Relevant bibliographies by topics / Mineral analyses

Academic literature on the topic 'Mineral analyses'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Mineral analyses"

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Sun, H., M. Nelson, F. Chen, and J. Husch. "Soil mineral structural water loss during loss on ignition analyses." Canadian Journal of Soil Science 89, no. 5 (November 1, 2009): 603–10. http://dx.doi.org/10.4141/cjss09007.

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Water loss from soil minerals has been known to cause errors in the determination of soil organic matter when the loss on ignition (LOI) method is used. Unfortunately, no known published studies reliably quantify the range of structural water in the soil. To do this, 15 common reference minerals were analyzed by LOI to obtain their individual water loss. In addition, 14 upland, loamy soil samples and 3 wetland/hydric soil samples with varied mineral contents were analyzed to collect their X-ray powder diffraction spectra. Based upon X-ray spectra peak intensities, the modal abundance of minerals in each soil sample was determined using the RockJock computer program. The resultant modal weight percentages of all identified minerals in each soil sample were then multiplied by the LOI value for each mineral to obtain the mineral structural water loss (SWL) of that soil sample. For the 17 soil samples analyzed, the range of mineral water loss is 0.56 to 2.45%. Depending on the LOI values of the soil samples, the SWL:LOI ratios range from 0.04 to around 1.00. The SWL:LOI ratios are particularly low for top wetland soil when the LOI value is higher. The ratios are lower for surface soil samples than for subsurface soil samples because of the high LOI values in surface soil samples. Understanding soil mineral water loss and its relation to the LOI patterns from various environments is important for the accurate evaluation of soil organic matter when the LOI method is used. Key words: Mineral, structural water, loss on ignition
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Jeong, G. Y., and E. P. Achterberg. "Chemistry and mineralogy of clay minerals in Asian and Saharan dusts and the implications for iron availability." Atmospheric Chemistry and Physics Discussions 14, no. 11 (June 17, 2014): 15735–70. http://dx.doi.org/10.5194/acpd-14-15735-2014.

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Abstract. Mineral dust supplied to remote ocean regions stimulates phytoplankton growth through delivery of micronutrients, notably iron (Fe). Although attention is usually paid to Fe (hydr)oxides as major sources of available Fe, Fe-bearing clay minerals are typically the dominant phase in mineral dust. The mineralogy and chemistry of clay minerals in dust particles, however, are largely unknown. We conducted microscopic identification and chemical analysis of the clay minerals in Asian and Saharan dust particles. Cross-sectional slices of dust particles were prepared by focused ion beam (FIB) techniques and analyzed by transmission electron microscopy (TEM) combined with energy dispersive X-ray spectroscopy (EDXS). TEM images of FIB slices revealed that clay minerals occurred as either nano-thin platelets or relatively thick plates. The nano-thin platelets included illite, smectite, illite–smectite mixed layers and their nanoscale mixtures (illite–smectite series clay minerals, ISCMs) which could not be resolved with an electron microbeam. EDXS chemical analysis of the clay mineral grains revealed that the average Fe content was 5.8% in nano-thin ISCM platelets assuming 14% H2O, while the Fe content of illite and chlorite was 2.8 and 14.8%, respectively. In addition, TEM and EDXS analyses were performed on clay mineral grains dispersed and loaded on microgrids. The average Fe content of clay mineral grains was 6.7 and 5.4% in Asian and Saharan dusts, respectively. A comparative X-ray diffraction analysis of bulk dusts showed that Saharan dust was more enriched in clay minerals than in Asian dust, while Asian dust was more enriched in chlorite. The average Fe / Si, Al / Si and Fe / Al molar ratios of the clay minerals, compared to previously reported chemistries of mineral dusts and leached solutions, indicated that dissolved Fe originated from clay minerals. Clay minerals, in particular nanocrystalline ISCMs and Fe-rich chlorite are important sources of available Fe in remote marine ecosystems. Further detailed analyses of the mineralogy and chemistry of clay minerals in global aerosols are required to determine the inputs of Fe available to surface ocean microbial communities.
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Jeong, G. Y., and E. P. Achterberg. "Chemistry and mineralogy of clay minerals in Asian and Saharan dusts and the implications for iron supply to the oceans." Atmospheric Chemistry and Physics 14, no. 22 (November 27, 2014): 12415–28. http://dx.doi.org/10.5194/acp-14-12415-2014.

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Abstract. Mineral dust supplied to remote ocean regions stimulates phytoplankton growth through delivery of micronutrients, notably iron (Fe). Although attention is usually paid to Fe (hydr)oxides as major sources of available Fe, Fe-bearing clay minerals are typically the dominant phase in mineral dust. The mineralogy and chemistry of clay minerals in dust particles, however, are largely unknown. We conducted microscopic identification and chemical analysis of the clay minerals in Asian and Saharan dust particles. Cross-sectional slices of dust particles were prepared by focused ion beam (FIB) techniques and analyzed by transmission electron microscopy (TEM) combined with energy dispersive X-ray spectroscopy (EDXS). TEM images of FIB slices revealed that clay minerals occurred as either nano-thin platelets or relatively thick plates. Chemical compositions and lattice fringes of the nano-thin platelets suggested that they included illite, smectite, illite–smectite mixed layers, and their nanoscale mixtures (illite–smectite series clay minerals, ISCMs) which could not be resolved with an electron microbeam. EDXS chemical analysis of the clay mineral grains revealed that the average Fe content was 5.8% in nano-thin ISCM platelets assuming 14% H2O, while the Fe content of illite and chlorite was 2.8 and 14.8%, respectively. In addition, TEM and EDXS analyses were performed on clay mineral grains dispersed and loaded on micro-grids. The average Fe content of clay mineral grains was 6.7 and 5.4% in Asian and Saharan dusts, respectively. A comparative X-ray diffraction analysis of bulk dusts showed that Saharan dust was more enriched in clay minerals than Asian dust, while Asian dust was more enriched in chlorite. Clay minerals, in particular nanocrystalline ISCMs and Fe-rich chlorite, are probably important sources of Fe to remote marine ecosystems. Further detailed analyses of the mineralogy and chemistry of clay minerals in global mineral dusts are required to evaluate the inputs of Fe to surface ocean microbial communities.
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Goldstein, J. I., P. G. Kotula, J. R. Michael, and G. R. Huss. "Mineral Analyses of Extraterrestrial Metal." Microscopy and Microanalysis 20, S3 (August 2014): 1674–75. http://dx.doi.org/10.1017/s1431927614010101.

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Sabine, P. A., M. T. Styles, and B. R. Young. "The nature and paragenesis of natural bredigite and associated minerals from Carneal and Scawt Hill, Co. Antrim." Mineralogical Magazine 49, no. 354 (December 1985): 663–70. http://dx.doi.org/10.1180/minmag.1985.049.354.05.

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AbstractBredigite is a constituent of the very high-temperature, low-pressure, exomorphic suite of Carneal, Co. Antrim. Although this mineral is very rare in nature, it is an important constituent of some slags and cement clinkers but there has been much controversy about its nature, most of the evidence having come from artificial materials. Chemical analysis of the Carneal mineral shows it to be remarkably similar to that from the type locality, Scawt Hill (also analysed here), and that it is an individual mineral species of generalized ionic composition (Ca,Na)14(Mg,Fe2+Fe3+Mn)2(Si,P)8O32. Ba (abundant in the original analysis of the slag mineral) is not a constituent. Accurate X-ray powder data of the natural mineral are given. Bredigite is not Ca2SiO4, nor is it part of a solid solution of variable composition between larnite and merwinite. Analyses are presented for the associated minerals larnite (allowing appraisal of its composition), spurrite, and spinels. The paragenesis is discussed.
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Son, Young-Sun, Byoung-Woon You, Eun-Seok Bang, Seong-Jun Cho, Kwang-Eun Kim, Hyunseob Baik, and Hyeong-Tae Nam. "Mapping Alteration Mineralogy in Eastern Tsogttsetsii, Mongolia, Based on the WorldView-3 and Field Shortwave-Infrared Spectroscopy Analyses." Remote Sensing 13, no. 5 (March 1, 2021): 914. http://dx.doi.org/10.3390/rs13050914.

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This study produces alteration mineral maps based on WorldView-3 (WV-3) data and field shortwave-infrared (SWIR) spectroscopy. It is supported by conventional analytical methods such as X-ray diffraction, X-ray fluorescence, and electron probe X-ray micro analyzer as an initial step for mineral exploration in eastern Tsogttsetsii, Mongolia, where access is limited. Distributions of advanced argillic minerals (alunite, dickite, and kaolinite), illite/smectite (illite, smectite, and mixed-layered illite-smectite), and ammonium minerals (buddingtonite and NH4-illite) were mapped using the decorrelation stretch, band math, and mixture-tuned-matched filter (MTMF) techniques. The accuracy assessment of the WV-3 MTMF map using field SWIR data showed good WV-3 SWIR data accuracy for spectrally predominant alteration minerals such as alunite, kaolinite, buddingtonite, and NH4-illite. The combination of WV-3 SWIR mineral mapping and a drone photogrammetric-derived digital elevation model contributed to an understanding of the structural development of the hydrothermal system through visualization of the topographic and spatial distribution of surface alteration minerals. Field SWIR spectroscopy provided further detailed information regarding alteration minerals such as chemical variations of alunite, crystallinity of kaolinite, and aluminum abundance of illite that was unavailable in WV-3 SWIR data. Combining WV-3 SWIR data and field SWIR spectroscopy with conventional exploration methods can narrow the selection between deposit models and facilitate mineral exploration.
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Fawcett, T. G., J. R. Blanton, S. N. Kabekkodu, and T. N. Blanton. "Mineral identification by elemental composition: a new tool within PDF-4 databases." Powder Diffraction 33, no. 2 (June 2018): 156–61. http://dx.doi.org/10.1017/s0885715618000404.

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The ICDD has developed a microanalysis tool to help scientists identify minerals from their elemental analyses, most typically micro-XRF or a microprobe analysis. Many minerals have characteristic elemental profiles that can often distinguish the mineral from others by their composition differences. In Release 2016 ICDD® PDF-4 databases 20 670 unique compositions have been identified out of 45 497 mineral and mineral-related entries. The application utilizes several common features of PDF® databases to enhance correct identification, most notably those formulas are expressed in weight and atomic percent, data sets are classified by mineral nomenclature and structural classifications, and most minerals have associated atomic and molecular structures. These crystal structures are very useful in determining compositional variants and solid solutions. The ICDD has developed algorithms that are analogous to the search/match processes used for powder diffraction identification. Data can be input as either the element or common oxide. To test the algorithm and graphics interfaces we compared results from the microanalysis module to published data from the Smithsonian Microbeam reference mineral collection. The software correctly identified 24/28 minerals by the highest merit score in the algorithm. In two cases, an isoelemental mineral was identified and in two other cases, the specimens had more elements than the reference standards hindering positive phase identification.
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Ayub, Syifa Afiza, Haylay Tsegab, Omeid Rahmani, and Amin Beiranvand Pour. "Potential for CO2 Mineral Carbonation in the Paleogene Segamat Basalt of Malaysia." Minerals 10, no. 12 (November 24, 2020): 1045. http://dx.doi.org/10.3390/min10121045.

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Geological storage of carbon dioxide (CO2) requires the host rock to have the capacity to permanently store CO2 with minimum post-storage monitoring. Mineral carbonation in geological formations is one of the most promising approaches to CO2 storage as the captured CO2 is converted into stable carbonated minerals (e.g., calcite and magnesite). In this study, we investigated the geochemical and mineralogical characteristics of Segamat basalt in the Central Belt of Malaysia and evaluated its potential for mineral carbonation by using laboratory analyses of X–ray fluorescence (XRF), X–ray diffraction analysis (XRD) and petrographic study. The XRF results showed that Segamat basalt samples contain a number of elements such as Fe (21.81–23.80 wt.%), Ca (15.40–20.83 wt.%), and Mg (3.43–5.36 wt.%) that can react with CO2 to form stable carbonated minerals. The XRD and petrographic results indicated that Segamat basalt contains the reactive mineral groups of pyroxene and olivine, which are suitable for the mineral carbonation process. The results of this study could help to identify the spatial distribution of elements and minerals in the Segamat basalt and to assess its mineral carbonation potential for geological storage in Malaysia.
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Jeen, Sung-Wook. "Sensitivity Analyses for Modeling Evolving Reactivity of Granular Iron for the Treatment of Trichloroethylene." Water 10, no. 12 (December 19, 2018): 1878. http://dx.doi.org/10.3390/w10121878.

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To better predict long-term performance of a remediation system, parameters of a numerical model should be constrained with care by calibrating with reliable experimental data. This study conducted sensitivity analyses for model parameters, which were shown to represent reasonably well the observed geochemical behaviors for the column experiments that evaluated evolving reactivity of granular iron for the treatment of trichloroethylene (TCE) resulting from precipitation of secondary minerals. The particular model parameters tested include iron corrosion rate, aragonite and Fe2(OH)2CO3 precipitation rates, and proportionality constants for each mineral. For sensitivity analyses, a specific parameter was systematically changed, while other parameters were fixed at the values for the base case. The ranges of parameters tested were determined based on the previous modeling study. The results showed that the most important and sensitive model parameters were secondary mineral precipitation rates. Also, not only absolute precipitation rate for each mineral but also relative precipitation rates among different minerals were important for system performance. With help of sensitivity analysis, the numerical model can be used as a predictive tool for designing an iron permeable reactive barrier (PRB) and can provide implications for the long-term changes in reactivity and permeability of the system.
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Weng, Yi-Tse, Chun-Chieh Wang, Cheng-Cheng Chiang, Heng Tsai, Yen-Fang Song, Shiuh-Tsuen Huang, and Biqing Liang. "In situ evidence of mineral physical protection and carbon stabilization revealed by nanoscale 3-D tomography." Biogeosciences 15, no. 10 (May 25, 2018): 3133–42. http://dx.doi.org/10.5194/bg-15-3133-2018.

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Abstract. An approach for nanoscale 3-D tomography of organic carbon (OC) and associated mineral nanoparticles was developed to illustrate their spatial distribution and boundary interplay, using synchrotron-based transmission X-ray microscopy (TXM). The proposed 3-D tomography technique was first applied to in situ observation of a laboratory-made consortium of black carbon (BC) and nanomineral (TiO2, 15 nm), and its performance was evaluated using dual-scan (absorption contrast and phase contrast) modes. This novel tool was then successfully applied to a natural OC–mineral consortium from mountain soil at a spatial resolution of 60 nm, showing the fine structure and boundary of OC, the distribution of abundant nano-sized minerals, and the 3-D organo-mineral association in situ. The stabilization of 3500-year-old natural OC was mainly attributed to the physical protection of nano-sized iron (Fe)-containing minerals (Fe oxyhydroxides including ferrihydrite, goethite, and lepidocrocite), and the strong organo-mineral complexation. In situ evidence revealed an abundance of mineral nanoparticles, in dense thin layers or nano-aggregates/clusters, instead of crystalline clay-sized minerals on or near OC surfaces. The key working minerals for C stabilization were reactive short-range-order (SRO) mineral nanoparticles and poorly crystalline submicron-sized clay minerals. Spectroscopic analyses demonstrated that the studied OC was not merely in crisscross co-localization with reactive SRO minerals; there could be a significant degree of binding between OC and the minerals. The ubiquity and abundance of mineral nanoparticles on the OC surface, and their heterogeneity in the natural environment may have been severely underestimated by traditional research approaches. Our in situ description of organo-mineral interplay at the nanoscale provides direct evidence to substantiate the importance of mineral physical protection for the long-term stabilization of OC. This high-resolution 3-D tomography approach is a promising tool for generating new insight into the interior 3-D structure of micro-aggregates, the in situ interplay between OC and minerals, and the fate of mineral nanoparticles (including heavy metals) in natural environments.
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Dissertations / Theses on the topic "Mineral analyses"

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Johansson, Fredrik. "Shear Strength of Unfilled and Rough Rock Joints in Sliding Stability Analyses of Concrete Dams." Doctoral thesis, Stockholm : Skolan för Arkitektur och samhällsbyggnad, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10450.

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Walker, Ryan Thomas. "Low-temperature Raman spectroscopic analyses of fluid inclusions from granitoid-related mineral deposits and comparisons with decrepitate analyses." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0013/MQ52490.pdf.

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Booth, Colin Anthony. "Sediment-source-linkages in the Gwendraeth Estuary, south Wales, based on mineral magnetic analyses." Thesis, University of Wolverhampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394037.

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Klichowicz, Michael. "Modeling of realistic microstructures on the basis of quantitative mineralogical analyses." OpenD, 2020. https://tubaf.qucosa.de/id/qucosa%3A72835.

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Diese Forschung zielt darauf ab, den Einsatz realistischer Mineralmikrostrukturen in Mineralverarbeitungssimulationen Simulationen von Aufbereitungsprozessen zu ermöglichen. Insbesondere Zerkleinerungsprozesse, wie z.B. das Brechen und Mahlen von mineralischen Rohmaterialien, werden stark von der mineralischen Mikrostruktur beeinflusst, da die Textur und die Struktur der vielen Körner und ihre mikromechanischen Eigenschaften das makroskopische Bruchverhalten bestimmen. Ein Beispiel: Stellen wir uns vor, wir haben ein mineralisches Material, das im Wesentlichen aus Körnern zweier verschiedener Mineralphasen, wie Quarz und Feldspat, besteht. Wenn die mikromechanischen Eigenschaften dieser beiden Phasen unterschiedlich sind, wird sich dies wahrscheinlich auf das makroskopische Bruchverhalten auswirken. Unter der Annahme, dass die Körner eines der Minerale bei geringeren Belastungen brechen, ist es wahrscheinlich, dass sich ein Riss durch einen Stein dieses Materials durch die schwächeren Körner ausbreitet. Tatsächlich ist dies eine wichtige Eigenschaft für die Erzaufbereitung. Um wertvolle Mineralien aus einem Erz zu gewinnen, ist es wichtig, sie aus dem kommerziell wertlosen Material, in dem sie vorkommen, zu befreien. Dazu ist es wichtig zu wissen und zu verstehen, wie das Material auf Korngrößenebene bricht. Um diesen Bruch simulieren zu können, ist es wichtig, realistische Modelle der mineralischen Mikrostrukturen zu verwenden. Diese Studie zeigt, wie solche realistischen zweidimensionalen Mikrostrukturen auf der Grundlage der quantitativen Mikrostrukturanalyse am Computer erzeugt werden können. Darüber hinaus zeigt die Studie, wie diese synthetischen Mikrostrukturen dann in die gut etablierte Diskrete-Elemente-Methode integriert werden können, bei der der Bruch von mineralischem Material auf Korngrößenebene simuliert werden kann.:List of Acronyms VII List of Latin Symbols IX List of Greek Symbols XV 1 Introduction 1 1.1 Motivation for using realistic microstructures in Discrete Element Method (DEM) 1 1.2 Possibilities for using realistic mineral microstructures in DEM simulations . 4 1.3 Objective and disposition of the thesis . . . . . . . . . . . . . . . . . . . . 7 2 Background 9 2.1 Discrete Element Method (DEM) . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1.1 Fundamentals of the Discrete Element Method (DEM) . . . . . . . . 9 2.1.2 Applications of DEM in comminution science . . . . . . . . . . . . . 21 2.1.3 Limitations of DEM in comminution science . . . . . . . . . . . . . . 26 2.2 Quantitative Microstructural Analysis . . . . . . . . . . . . . . . . . . . . . 29 2.2.1 Fundamentals of the Quantitative Microstructural Analysis . . . . . . 29 2.2.2 Applied QMA in mineral processing . . . . . . . . . . . . . . . . . . 49 2.2.3 Applicability of the QMA for the synthesis of realistic microstructures 49 3 Synthesis of realistic mineral microstructures for DEM simulations 51 3.1 Development of a computer-assisted QMA for the analysis of real and synthetic mineral microstructures . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.1.1 Fundamentals of the computer-assisted QMA . . . . . . . . . . . . 53 3.1.2 The requirements for the false-color image. . . . . . . . . . . . . . 54 3.1.3 The conversion of a given real mineral microstructure into a false-color image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 3.1.4 Implementation of the point, line, and area analysis . . . . . . . . . 59 3.1.5 Selection of appropriate QMA parameters for analyzing two-dimensional microstructures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 3.1.6 Summary of the principles of the adapted Quantitative Microstructural Analysis (QMA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 3.2 Analysis of possible strategies for the microstructure synthesis . . . . . . . . 71 3.3 Implementation of the drawing method . . . . . . . . . . . . . . . . . . . . 76 3.3.1 Drawing of a single grain . . . . . . . . . . . . . . . . . . . . . . . 77 XVIII List of Greek Symbols 3.3.2 Drawing of multiple grains, which form a synthetic microstructure . . 81 3.3.3 Synthesizing mineral microstructures consisting of multiple phases . 85 3.4 The final program for microstructure analysis and synthesis . . . . . . . . . 89 3.4.1 Synthesis and analysis of an example microstructure . . . . . . . . . 90 3.4.2 Procedure for generating a realistic synthetic microstructure of a given real microstructure . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 4 Validation of the synthesis approach 103 4.1 Methodical considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 4.1.1 The basic idea of the validation procedure . . . . . . . . . . . . . . 103 4.1.2 The experimental realizations . . . . . . . . . . . . . . . . . . . . . 108 4.2 Basic indenter test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 4.2.1 Considerations for the basic indenter test . . . . . . . . . . . . . . . 109 4.2.2 Realization and evaluation of the real basic indenter test . . . . . . . 114 4.2.3 Realization and evaluation of the simulated basic indenter test . . . 127 4.2.4 Conclusions on the basic indenter test . . . . . . . . . . . . . . . . . 138 4.3 Extended indenter test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 4.3.1 Basic considerations for the extended indenter test . . . . . . . . . . 139 4.3.2 Realization and evaluation of the real extended indenter test . . . . 142 4.3.3 Realization and evaluation of the simulated extended indenter test . 154 4.3.4 Conclusions on the extended indenter test . . . . . . . . . . . . . . 171 4.4 Particle bed test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 4.4.1 Basic considerations for the particle bed test . . . . . . . . . . . . . 173 4.4.2 Realization and evaluation of the real particle bed test . . . . . . . . 176 4.4.3 Realization and evaluation of the simulated particle bed test . . . . . 188 4.4.4 Conclusions on the particle bed test . . . . . . . . . . . . . . . . . . 203 5 Conclusions and directions for future development 205 6 References 211 List of Figures 229 List of Tables 235 Appendix 237
This research aims to make it possible to use realistic mineral microstructures in simulations of mineral processing. In particular, comminution processes, such as the crushing and grinding of raw mineral materials, are highly aff ected by the mineral microstructure, since the texture and structure of the many grains and their micromechanical properties determine the macroscopic fracture behavior. To illustrate this, consider a mineral material that essentially consists of grains of two diff erent mineral phases, such as quartz and feldspar. If the micromechanical properties of these two phases are diff erent, this will likely have an impact on the macroscopic fracture behavior. Assuming that the grains of one of the minerals break at lower loads, it is likely that a crack through a stone of that material will spread through the weaker grains. In fact, this is an important property for ore processing. In order to extract valuable minerals from an ore, it is important to liberate them from the commercially worthless material in which they are found. For this, it is essential to know and understand how the material breaks at grain-size level. To be able to simulate this breakage, it is important to use realistic models of the mineral microstructures. This study demonstrates how such realistic two-dimensional microstructures can be generated on the computer based on quantitative microstructural analysis. Furthermore, the study shows how these synthetic microstructures can then be incorporated into the well-established discrete element method, where the breakage of mineral material can be simulated at grain-size level.:List of Acronyms VII List of Latin Symbols IX List of Greek Symbols XV 1 Introduction 1 1.1 Motivation for using realistic microstructures in Discrete Element Method (DEM) 1 1.2 Possibilities for using realistic mineral microstructures in DEM simulations . 4 1.3 Objective and disposition of the thesis . . . . . . . . . . . . . . . . . . . . 7 2 Background 9 2.1 Discrete Element Method (DEM) . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1.1 Fundamentals of the Discrete Element Method (DEM) . . . . . . . . 9 2.1.2 Applications of DEM in comminution science . . . . . . . . . . . . . 21 2.1.3 Limitations of DEM in comminution science . . . . . . . . . . . . . . 26 2.2 Quantitative Microstructural Analysis . . . . . . . . . . . . . . . . . . . . . 29 2.2.1 Fundamentals of the Quantitative Microstructural Analysis . . . . . . 29 2.2.2 Applied QMA in mineral processing . . . . . . . . . . . . . . . . . . 49 2.2.3 Applicability of the QMA for the synthesis of realistic microstructures 49 3 Synthesis of realistic mineral microstructures for DEM simulations 51 3.1 Development of a computer-assisted QMA for the analysis of real and synthetic mineral microstructures . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.1.1 Fundamentals of the computer-assisted QMA . . . . . . . . . . . . 53 3.1.2 The requirements for the false-color image. . . . . . . . . . . . . . 54 3.1.3 The conversion of a given real mineral microstructure into a false-color image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 3.1.4 Implementation of the point, line, and area analysis . . . . . . . . . 59 3.1.5 Selection of appropriate QMA parameters for analyzing two-dimensional microstructures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 3.1.6 Summary of the principles of the adapted Quantitative Microstructural Analysis (QMA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 3.2 Analysis of possible strategies for the microstructure synthesis . . . . . . . . 71 3.3 Implementation of the drawing method . . . . . . . . . . . . . . . . . . . . 76 3.3.1 Drawing of a single grain . . . . . . . . . . . . . . . . . . . . . . . 77 XVIII List of Greek Symbols 3.3.2 Drawing of multiple grains, which form a synthetic microstructure . . 81 3.3.3 Synthesizing mineral microstructures consisting of multiple phases . 85 3.4 The final program for microstructure analysis and synthesis . . . . . . . . . 89 3.4.1 Synthesis and analysis of an example microstructure . . . . . . . . . 90 3.4.2 Procedure for generating a realistic synthetic microstructure of a given real microstructure . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 4 Validation of the synthesis approach 103 4.1 Methodical considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 4.1.1 The basic idea of the validation procedure . . . . . . . . . . . . . . 103 4.1.2 The experimental realizations . . . . . . . . . . . . . . . . . . . . . 108 4.2 Basic indenter test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 4.2.1 Considerations for the basic indenter test . . . . . . . . . . . . . . . 109 4.2.2 Realization and evaluation of the real basic indenter test . . . . . . . 114 4.2.3 Realization and evaluation of the simulated basic indenter test . . . 127 4.2.4 Conclusions on the basic indenter test . . . . . . . . . . . . . . . . . 138 4.3 Extended indenter test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 4.3.1 Basic considerations for the extended indenter test . . . . . . . . . . 139 4.3.2 Realization and evaluation of the real extended indenter test . . . . 142 4.3.3 Realization and evaluation of the simulated extended indenter test . 154 4.3.4 Conclusions on the extended indenter test . . . . . . . . . . . . . . 171 4.4 Particle bed test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 4.4.1 Basic considerations for the particle bed test . . . . . . . . . . . . . 173 4.4.2 Realization and evaluation of the real particle bed test . . . . . . . . 176 4.4.3 Realization and evaluation of the simulated particle bed test . . . . . 188 4.4.4 Conclusions on the particle bed test . . . . . . . . . . . . . . . . . . 203 5 Conclusions and directions for future development 205 6 References 211 List of Figures 229 List of Tables 235 Appendix 237
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Mamuse, Antony. "Spatial statistical estimation of undiscovered mineral endowment: case of komatiite-associated nickel sulphide resources, Kalgoorlie Terrane, Western Australia." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/449.

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The Kalgoorlie Terrane of the Yilgarn Craton, Western Australia, containing about 60% (~11 Mt) of the world’s known komatiite-hosted nickel sulphide resources, is the world’s best studied and economically most important province for this mineral deposit type. Although increasingly mature in terms of nickel exploration, the Kalgoorlie Terrane is believed to contain significant additional undiscovered nickel endowment. Using the data-rich Kalgoorlie Terrane, this thesis develops a benchmark methodology that combines geological knowledge with spatial analysis and mathematical-statistical methods to estimate undiscovered nickel resources.In the proposed methodology, nickel sulphide deposits are considered realisations of stochastic mineralisation processes and are analysed within the following framework. Komatiites in the Kalgoorlie Terrane constitute the full sample space or the permissive tract. Disjoint, naturally bound individual komatiite bodies that make up the sample space are used as the spatial analysis units. Some komatiite bodies within the sample space contain nickel sulphide deposits (mineralised) and others do not (unmineralised). In this study, the most explored mineralised komatiite bodies constitute local control areas against which nickel resources in the less explored komatiite bodies can be assessed. The concept of local control areas is analogous to the concept of global control areas which are well explored parts of permissive areas for particular deposit types worldwide.Spatial point pattern analyses showed that the spatial distribution of mineralised komatiite bodies within the sample space is clustered. In contrast, nickel sulphide deposits in individual komatiite bodies are either randomly distributed or dispersed, and not clustered. This absence of deposit clustering within individual komatiite bodies indicates that the intensity of the deposit pattern of each komatiite body may be adequately expressed as deposit density (number of deposits per km[superscript]2). In global quantitative resource assessments, regression analysis of the well established power law relationship between deposit density and size of global control areas provides a robust method for estimating the number of deposits.In this study a power law relationship reminiscent of that in global models was found between the sizes of control areas and deposit density. In addition, this study establishes another power law relationship between nickel endowment density (nickel metal per km[superscript]2) and the sizes of control areas. Deposit and endowment density regression models based on the two power laws suggested that, respectively, 59 to 210 (mean 114) nickel sulphide deposits and 3.0 to 10.0 Mt (mean 5.5 Mt) nickel metal remained undiscovered in demonstrably mineralised komatiite bodies within the Kalgoorlie Terrane. More emphasis is placed on endowment density which may be more intrinsic to the Kalgoorlie Terrane than deposit density because deposit counts are confounded by definitional ambiguities emanating from orebody complexities. Thus the spatial pattern of mineral deposits may not coincide with the spatial pattern of mineral endowment as demonstrated by spatial centrographic analyses in this study.To estimate the amount of undiscovered nickel metal in the entire Kalgoorlie Terrane and not just in the demonstrably mineralised komatiite bodies, Zipf’s law was applied. According to Zipf’s law, the size of the largest deposit is twice the size of the second, thrice the size of the third, four times the fourth, and so on. Based on the currently known size of Mt. Keith deposit, the largest nickel sulphide deposit in the Kalgoorlie Terrane, Zipf’s law indicates that the terrane is nearly mature in terms of nickel exploration and contains only about 3.0 Mt nickel metal in undiscovered resources. The collective implication of the regression and Zipf’s law estimates is that in the Kalgoorlie Terrane, no significant nickel resources are likely to be contained in the known komatiites that are presently not demonstrably mineralised. However if, as widely speculated, the actual size of Mt. Keith deposit is about twice the currently known size, Zipf’s law predicts 10.0 Mt nickel metal in undiscovered nickel endowment for the Kalgoorlie Terrane. The additional 7.0 Mt undiscovered nickel metal endowment is attributed to opening up of a new exploration search space through deeper resource delineation, within an otherwise nearly mature terrane.
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[Verfasser], Chen Xiaochao, and Uwe [Akademischer Betreuer] Ludewig. "Comprehensive analyses of DNA methylation profile, regulation on flowering, and seed mineral accumulation in Arabidopsis thaliana in response to zinc deficiency / Chen Xiaochao ; Betreuer: Uwe Ludewig." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2017. http://d-nb.info/1126556750/34.

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Cappello, Mariko'. "Petrographic and geochemical characterization of a sample taken from the beni bousera peridotite (Morocco)." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10833/.

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Il massiccio di Beni Bousera (Marocco) è formato da diverse unità geologiche composte prevalentemente da rocce metamorfiche molto simili a quelle che si trovano nel massiccio di Ronda (Spagna). Queste due catene montuose erano connesse prima dell’estensione (iniziata nel Miocene inferiore) che le ha separate lasciando il posto al mare di Alborán. Questo studio sarà incentrato soltanto sul massiccio marocchino, in particolare sull’unità peridotitica di Beni Bousera. Questa unità è stata suddivisa in quattro domini, ognuno dei quali ha specifiche caratteristiche petrologiche e geochimiche, che sono il risultato di diverse condizioni metamorfiche e di diversi regimi tettonici. L’obiettivo di questo lavoro è di caratterizzare, dal punto di vista petrologico, un campione che è stato prelevato dal massiccio di Beni Bousera, nella zona costiera del mare di Alborán e di determinare a quale dominio esso appartiene.
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Mohammed, Gihan. "Modélisation biogéochimique du système ”Irrigation-sol-plante-nappe” : Application à la durabilité du système de culture du foin de Crau." Thesis, Avignon, 2017. http://www.theses.fr/2017AVIG0691.

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Une nouvelle méthodologie fondée sur l’interfaçage de la géochimie et de la biologie a été utilisée pour étudier la durabilité d’un système d’agriculture irriguée face aux changements globaux (climat et urbanisation). L’étude de sa durabilité nécessite une vision dynamique spatio-temporelle de l’évolution d’un agrosystème irrigué, ici le système « irrigation – prairie (plante) – sol – nappe ». Pour cela, deux démarches sont utilisées : l’étude de terrain et la modélisation. L’étude de terrain comprend des suivis temporels et spatiaux de la qualité des eaux de surface, de la nappe phréatique et de la qualité du foin des prairies. La modélisation consiste en un modèle biogéochimique prenant en compte l’ensemble des compartiments réactionnels du système. Le fil directeur est constitué par les mécanismes d’acquisition de la composition chimique de l’eau lors de son transfert dans le sol depuis eau d’irrigation jusqu’à l’eau de nappe. Ces mécanismes sont étudiés du double point de vue de leurs bilans géochimiques et des réactions sol / solution. L’acquisition de données porte ainsi sur : (1) la composition chimique des eaux d’irrigation et des eaux souterraines de la nappe ; (2) la minéralogie des sols ; (3) la nature des engrais apporté ; (4) la quantité des éléments chimiques prélevés et exportés par les plantes. Le modèle biogéochimique consiste à interfacer le modèle de culture STICS et le modèle de géochimie PHREEQC. Ce modèle est capable de rendre compte de l’évolution des eaux lors de leur parcours dans le sol et de mettre en évidence les processus majeurs qui déterminent la qualité de l’eau ; en sortie, il permet d’établir des indicateurs géochimiques pertinents pour la gestion du système. Cette méthode est appliquée aux prairies irriguées en la Crau, au Sud de France. Le système d’irrigation gravitaire par les eaux de la Durance depuis le 16e siècle sur la Crau a construit un système agricole durable en amenant des alluvions sur les terres irriguées, sur lequel poussent les prairies (le foin de Crau (AOP)). De plus cette irrigation participe à plus de 70% au renouvellement des eaux de la nappe phréatique. L’analyse des données sur une longue durée (1960-2013), l’acquisition de données récentes et la modélisation montrent l’originalité et la durabilité de cet agrosystème irrigué et sa résilience face à une augmentation de température de 2°C, tant en ce qui concerne les rendements que la qualité du foin. Cependant dans la perspective des changements globaux, les prévisions tablent sur une disponibilité en eau pour l’irrigation en diminution, de plus des changements d’occupation du sol (10% de la surface totale), avec une réduction des prairies irriguées. Ceci risque de remettre en cause la durabilité de l’agrosystème irrigué et partant l’approvisionnement en eau à partir de la nappe de toute l’économie locale (300 000 habitants, les industries lourdes du site de Fos-sur-Mer)
A new methodology based on geochemistry and biology interfacing to study the sustainability of an irrigated agriculture system in the face of global changes (climate and urban sprawl). It requires construction of a spatio-temporal view of the ”irrigation - meadow (plant) - soil - groundwater” system evolution. Thereby two approaches are used : the field study and the modeling. The field study includes temporal and spatial survey of waters quality, plant quality and used fertilizers. The modeling consists of a biogeochemical model taking into account all the factors reaction of the system. The main theme is the mechanisms of acquiring the chemical composition of water during its transfer the soil horizon from irrigation water to groundwater. These mechanisms are studied from the double point of view of their geochemical balances and soil / solution reactions. The data acquisition thus relates to : (1) the chemical composition of irrigation water and groundwater ; (2) the soil mineralogy ; (3) the nature of the provided fertilizer ; (4) quantity of chemical elements uptaken by plants. The biogeochemical model consists in interfacing the crop model (STICS) and the geochemical model (PHREEQC). This model is able to perform the chemical evolution of waters during their pathway in the soil and to highlight the major processes that determine the water quality ; in output, it makes it possible to establish geochemical indicators relevant to the system management. The Crau is chosen as a demo area, South France, its grassland production is based on surface irrigation via channels withdrawn from the Durance River. Irrigation water is rich in minerals and trace elements thanks to alluvium brought, on which produce high quality hay that is regulated under appellation control since 1997. Additionally, this irrigation recharge the aquifer by 70% But it is threatened by global changes, which ultimately risks to compromising the sustainability of the irrigated grassland system. Data analysis over a long term (1960-2013), the acquisition of recent data and modeling show the originality and durability of this irrigated agrosystem and Its resilience to an increase in temperature by about 2°C, both in terms of yields and hay quality. However, according to future scenarios, declining of irrigation water is forecasted, and changes in land use by 10% of the total area, with a reduction in irrigated grassland areas. This may jeopardize the sustainability of the the irrigated agrosystem and thus the water supply for local use (300 000 inhabitants, the heavy industries of the Fos-sur-Mer site)
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Hynes, B. R. "Mineral taxation : a comparative analysis." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292260.

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Bosworth, Timothy Mark. "Sensors analysis of mineral insulating oil." Thesis, Cranfield University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392986.

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Books on the topic "Mineral analyses"

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Castor, Stephen B. Subsurface mineral resource analysis, Yucca Mountain, Nevada: Report of chemical analyses. [Reno, Nev.]: Nevada Bureau of Mines and Geology, 1993.

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Freeborn, W. Phelps. MINCLC: A FORTRAN program for recalculating mineral analyses. [Reston, Va.?]: Dept. of the Interior, U.S. Geological Survey, 1985.

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Freeborn, W. Phelps. MINCLC: A FORTRAN program for recalculating mineral analyses. [Reston, Va.?]: Dept. of the Interior, U.S. Geological Survey, 1985.

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Freeborn, W. Phelps. MINCLC: A FORTRAN program for recalculating mineral analyses. [Reston, Va.?]: Dept. of the Interior, U.S. Geological Survey, 1985.

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Crowson, Phillip. Minerals handbook: Statistics and analyses of the world's minerals industry. London: Macmillan, 1986.

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Luepke, Gretchen. Grain-size, heavy-mineral, and geochemical analyses of sediments from the Chuckchi. Washington, DC: Dept. of the Interior, 1989.

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Booth, Colin Anthony. Sediment - source - linkages in the Gwendraeth Estuary, South Wales, based on mineral magnetic analyses. Wolverhampton: University of Wolverhampton, 2002.

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Luepke, Gretchen. Grain-size, heavy-mineral, and geochemical analyses of sediments from the Chuckchi [i.e. Chukchi] Sea, Alaska. Washington: U.S. G.P.O., 1989.

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Dickinson, Kendell A. Preliminary chemical and mineralogical analyses of the major volcanic ash beds in the Oligocene Brule Formation, northwestern Nebraska. [Reston, Va.]: U.S. Dept. of Interior, U.S. Geological Survey, 1994.

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Rosa, Maria I. De. Analyses of mobile equipment fires for all U.S. surface and underground coal and metal/nonmetal mining categories, 1990-1999. Pittsburgh, PA: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 2004.

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Book chapters on the topic "Mineral analyses"

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Bégin, R., S. Massé, M. Rola-Pleszczynski, G. Drapeau, S. Péloquin, M. Geoffrey, J. Labbé, S. Gouin, Y. Desmarais, and M. Martel. "Bronchoalveolar and Lung Tissue Analyses in Asbestos-exposed Humans and Sheep." In In Vitro Effects of Mineral Dusts, 359–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70630-1_45.

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Danso, Felix. "Analyses of mineral resource governance and human development in Ghana." In Mineral Resource Governance and Human Development in Ghana, 53–96. Abingdon, Oxon: New York, NY: Routledge, 2020. | Series: Routledge studies in African development: Routledge, 2020. http://dx.doi.org/10.4324/9781003005537-4.

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Al-Dousari, Ali, and Muntha Bahbahani. "Mineralogy (XRD)." In Atlas of Fallen Dust in Kuwait, 95–119. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66977-5_4.

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Abstract The two main particle size components of the dust samples were subjected to mineralogical analysis to identify the mineral constituents and determine their frequency percentage in each textural class; the fine sand (particle size between 0.125 and 0.063 mm) and Mud (less than 0.063 mm). The average percentage of minerals was mapped out for each season i.e. March, June, September and December 2010 showing the high and low mineral concentration in areas in Kuwait covering the mineral concentrations of Calcite, Carbonate, clay minerals, dolomite, feldspars, and quartz.
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Nielsen, S. Suzanne. "Mineral Analysis." In Instructor’s Manual for Food Analysis: Second Edition, 31–33. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5439-4_10.

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Woods, Douglas W., Matthew R. Capriotti, Madison Pilato, Carolyn A. Doyle, Christopher J. McDougle, Beth Springate, Deborah Fein, et al. "Hair Mineral Analysis." In Encyclopedia of Autism Spectrum Disorders, 1474. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-1698-3_100654.

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Chen, Wengang, Yuzhou Gao, and Huichen Zhang. "XPS and SEM Analyses of Self-Repairing Film Formed by Mineral Particles as Lubricant Additives on the Metal Friction Pairs." In Advanced Tribology, 660–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03653-8_215.

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Pomeranz, Yeshajahu, and Clifton E. Meloan. "Ash and Minerals." In Food Analysis, 602–24. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-6998-5_35.

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Kendell, Ashley, and P. Willey. "Crow Creek Bone Bed Commingling: Relationship Between Bone Mineral Density and Minimum Number of Individuals and Its Effect on Paleodemographic Analyses." In Commingled and Disarticulated Human Remains, 85–104. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7560-6_6.

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Nielsen, S. Suzanne. "Study Questions Mineral Analysis." In Food Science Text Series, 57–61. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4615-0033-9_12.

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Brunton, George D. "Quantitative Rock Mineral Analysis." In Frontiers in Sedimentary Geology, 303–4. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-4428-8_33.

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Conference papers on the topic "Mineral analyses"

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Nied, Eric P., Jeffrey P. Bons, and Ryan K. Lundgreen. "Unpacking Inter-Mineral Synergies and Reactions During Dust Deposition in an Impingement Coolant Jet." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82304.

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Abstract This paper seeks to unpack the synergies that exist between minerals during deposition of the heterogeneous AFRL02 mixture in gas turbine engines and demonstrate that the contributions of each mineral cannot be considered independently of others. In each experiment, one gram of a mineral dust (0–10μm particle diameter distribution) was injected into an 894K, 57m/s coolant flow impinging normally on a Hastelloy X plate with a surface temperature of 1033K, 1144K, or 1255K. Capture efficiency measurements, deposit morphology analyses, and X-ray diffraction results are reported. Besides AFRL02, single mineral dusts, dual mineral dusts, and AFRL02-like dust blends lacking in one mineral were tested. The results of the experiments elucidate that the deposition behavior of single minerals indeed cannot explain the composite deposition of heterogeneous mixtures of minerals. For example, gypsum had the highest capture efficiency of any single mineral in ARFL02, and yet removing gypsum from AFRL02 counterintuitively raised the capture efficiency of that blend when compared to AFRL02. Quartz was found to erode albite deposits but stick to and build upon dolomite and halite deposits, even though quartz did not deposit significantly as a single mineral. Quartz also chemically reacted with gypsum and dolomite to form wollastonite and diopside, respectively. Finally, we found that the capture efficiency of each blend increased with plate temperature, but not according to the same trend. Results are interpreted through the lens of CaO-MgO-Al2O3-SiO2 eutectic chemistry, but the chemical pathways by which these eutectics come into existence is found to be of equal importance.
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Hadjadj, Yazid, Refat Atef Ghunem, and Issouf Fofana. "Decomposition Kinetics of Natural Ester and Mineral Oil from Thermogravimetric Analyses." In 2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP). IEEE, 2021. http://dx.doi.org/10.1109/ceidp50766.2021.9705355.

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Fahmi, Riza, Syafrizal, and Asep Saepuloh. "Identification technique of alteration zones on site Kutacane, South-East Aceh, verified by petrography and XRD analyses." In 2ND INTERNATIONAL CONFERENCE ON EARTH SCIENCE, MINERAL, AND ENERGY. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0007231.

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Prasetyadi, Carolus, Muhammad Gazali Rachman, Achmad Subandrio, and Mahap Maha. "Petroleum reservoir potential of Pacitan subvolcanic rocks based on qualitative and quantitative analyses of porosity & permeability." In 2ND INTERNATIONAL CONFERENCE ON EARTH SCIENCE, MINERAL, AND ENERGY. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0011732.

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Motyleva, Svetlana M., Murat S. Gins, Valentina K. Gins, Ivan M. Kulikov, Petr F. Kononkov, Viktir F. Pivovarov, and Sergei M. Medvedev. "SEM and EDX analyses for mineral inclusions in the leaves Amaranthus L." In MATERIALS CHARACTERIZATION USING X-RAYS AND RELATED TECHNIQUES. Author(s), 2019. http://dx.doi.org/10.1063/1.5089317.

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Daccak, Diana, Ana Rita F. Coelho, Cláudia Campos Pessoa, Inês Carmo Luís, Ana Coelho Marques, José C. Ramalho, Paula Scotti Campos, et al. "Fertilization with ZnO and ZnSO4: Mineral Analyses in Vitis vinifera Grapes cv. Fernão Pires." In IECHo 2022. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/iecho2022-12512.

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Khodadadzadeh, Mahdi, and Richard Gloaguen. "Upscaling High-Resolution Mineralogical Analyses to Estimate Mineral Abundances in Drill Core Hyperspectral Data." In IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2019. http://dx.doi.org/10.1109/igarss.2019.8898441.

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M. S. Elgendy, Ahmed, Simone Ricci, Elena I. Cojocariu, and Claudio Geloni. "A Streamlined Workflow From Experimental Analyses to Dynamic Geochemical Modelling." In SPE Europec featured at 82nd EAGE Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205128-ms.

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Abstract Dynamic-geochemical model is a powerful instrument to evaluate the geochemical effects on CO2storage capacity, injectivity and long-term containment. The study objective is to apply an integrated multi-step workflow to a carbon capture and storage (CCS) candidate field (offshore), namely hereinafter H field. From experimental analyses, a comprehensive real data-tailored reactive transport model (RTM) has been built to capture the dynamics and the geochemical phenomena (e.g., water vaporization, CO2solubility, mineral alteration) occurring during and after the CO2injection in sedimentary formations. The proposed integrated workflow couples lab activities and numerical simulations and it is developed according to the following steps: Mineralogical-chemical characterization (XRD, XRF and SEM-EDX experimental techniques) of field core samples; Data elaboration and integration to define the conceptual geochemical model; Synthetic brine reconstruction by means of 0D geochemical models; Numerical geochemical modelling at different complexity levels. Field rocks chosen for CO2injection have been experimentally characterized, showing a high content of Fe in clayey, micaceous and carbonate mineralogical phases. New-defined, site-specific minerals have been characterized, starting from real XRD, XRF and SEM-EDX data and by calculation of their thermochemical parameters with a proprietary procedure. They are used to reconstruct synthetic formation water chemical composition (at equilibrium with both rock mineralogy and gas phase), subsequently used in RTM. CO2injection is simulated using 2D radial reactive transport model(s) built in a commercial compositional reservoir simulator. The simulations follow a step-increase in the complexity of the model by adding CO2solubility, water vaporization and geochemical reactions. Geochemical processes impact on CO2storage capacity and injectivity is quantitatively analyzed. The results show that neglecting the CO2solubility in formation water may underestimate the max CO2storage capacity in H field by around 1%, maintaining the same pressure build-up profile. Sensitivities on the impact of formation water salinity on the CO2solubility are presented. In a one thousand years’ time-scale, changes in reservoir porosity due to mineral alteration, triggered by CO2-brine-rock interactions, seem to be minimal in the near wellbore and far field. However, it has been seen that water vaporization with the associated halite precipitation inclusion in the simulation models is recommended, especially at high-level of formation brine salinity, for a reliable evaluation of CO2injectivity related risks. The proposed workflow provides a new perspective in geochemical application for CCS studies, which relies on novel labs techniques (analyses automation), data digitalization, unification and integration with a direct connection to the numerical models. The presented procedure can be followed to assess the geochemical short-and long-term risks in carbon storage projects.
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Sadooni, Fadhil N., Hamad Al-Saad Al-Kuwari, Ahmad Sakhaee-Pour, Wael S. Matter, and Indra Gunawan. "Lithologic Characterization and Micropore Structures of Gas Shale Strata: An example from the Midra Shale of Western Qatar." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2021. http://dx.doi.org/10.29117/quarfe.2021.0024.

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Gas shale is the future hydrocarbon reservoir of Qatar. The Qatari geologic section has had important successions of gas shale at different geologic times including the Eocene Midra shale, the Cretaceous Ratawi and Nahr Umr, and the Paleozoic Qusaibah and Unayzah formations. Shale samples were collected from the outcrops of the Midra Shale in Dukhan and Umm Bab areas. Samples were subjected to geochemical analyses using XRD and RXF. Selected samples were examined under SEM and TEM microscopes. All the studied samples contain palygorskite as the main mineral and, in some cases, the only mineral present, as indicated by X-ray diffraction patterns. XRF analysis shows palygorskite range from ideal palygorskite (equal aluminum and magnesium content) to aluminous palygorskite where no magnesium is recorded. The most common other minor minerals are halite, quartz, calcite, and other clay minerals: illite, smectite and sepiolite. The palygorskite chain phyllo silicates results in a fibrous habit with channels running parallel to the fiber length. Images from Transmission Electron Microscopy (TEM) clearly show the presence of bundled lath-like crystals of palygorskite 5 to 20 nm in width and several micrometers in length. The Midra Shale was deposited in a shallow marine shelf that was subjected to clastic influx from the nearby land. Although, the Midra contains many elements that support deposition under marine conditions such as large foraminifera and shark teeth, the presence of fully developed shale horizons indicate a mixed marine-continental depositional setting. Most of the micropores are channels associated with the palygorskite laths as can be seen from the TEM images or some dissolution pores that resulted from halite and gypsum dissolution by meteoric water.
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McIntosh, Julia A., and Neil J. Tabor. "STRATIGRAPHIC AND CLAY MINERAL ANALYSES OF PERMIAN-TRIASSIC BOUNDARY SECTIONS FROM THE CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-317265.

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Reports on the topic "Mineral analyses"

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de Caritat, Patrice, Brent McInnes, and Stephen Rowins. Towards a heavy mineral map of the Australian continent: a feasibility study. Geoscience Australia, 2020. http://dx.doi.org/10.11636/record.2020.031.

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Heavy minerals (HMs) are minerals with a specific gravity greater than 2.9 g/cm3. They are commonly highly resistant to physical and chemical weathering, and therefore persist in sediments as lasting indicators of the (former) presence of the rocks they formed in. The presence/absence of certain HMs, their associations with other HMs, their concentration levels, and the geochemical patterns they form in maps or 3D models can be indicative of geological processes that contributed to their formation. Furthermore trace element and isotopic analyses of HMs have been used to vector to mineralisation or constrain timing of geological processes. The positive role of HMs in mineral exploration is well established in other countries, but comparatively little understood in Australia. Here we present the results of a pilot project that was designed to establish, test and assess a workflow to produce a HM map (or atlas of maps) and dataset for Australia. This would represent a critical step in the ability to detect anomalous HM patterns as it would establish the background HM characteristics (i.e., unrelated to mineralisation). Further the extremely rich dataset produced would be a valuable input into any future machine learning/big data-based prospectivity analysis. The pilot project consisted in selecting ten sites from the National Geochemical Survey of Australia (NGSA) and separating and analysing the HM contents from the 75-430 µm grain-size fraction of the top (0-10 cm depth) sediment samples. A workflow was established and tested based on the density separation of the HM-rich phase by combining a shake table and the use of dense liquids. The automated mineralogy quantification was performed on a TESCAN® Integrated Mineral Analyser (TIMA) that identified and mapped thousands of grains in a matter of minutes for each sample. The results indicated that: (1) the NGSA samples are appropriate for HM analysis; (2) over 40 HMs were effectively identified and quantified using TIMA automated quantitative mineralogy; (3) the resultant HMs’ mineralogy is consistent with the samples’ bulk geochemistry and regional geological setting; and (4) the HM makeup of the NGSA samples varied across the country, as shown by the mineral mounts and preliminary maps. Based on these observations, HM mapping of the continent using NGSA samples will likely result in coherent and interpretable geological patterns relating to bedrock lithology, metamorphic grade, degree of alteration and mineralisation. It could assist in geological investigations especially where outcrop is minimal, challenging to correctly attribute due to extensive weathering, or simply difficult to access. It is believed that a continental-scale HM atlas for Australia could assist in derisking mineral exploration and lead to investment, e.g., via tenement uptake, exploration, discovery and ultimately exploitation. As some HMs are hosts for technology critical elements such as rare earth elements, their systematic and internally consistent quantification and mapping could lead to resource discovery essential for a more sustainable, lower-carbon economy.
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Холошин, Ігор Віталійович, Наталя Борисівна Пантелєєва, Олександр Миколайович Трунін, Людмила Володимирівна Бурман, and Ольга Олександрівна Калініченко. Infrared Spectroscopy as the Method for Evaluating Technological Properties of Minerals and Their Behavior in Technological Processes. E3S Web of Conferences, 2020. http://dx.doi.org/10.31812/123456789/3929.

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Infrared spectroscopy (IR) is a highly effective method for the analysis of minerals, rocks and ores, capable of solving a whole range of problems when choosing innovative solutions for the technological processing of various types of mineral raw materials. The article considers the main directions of using the infrared spectroscopy method in assessing the technological properties of minerals and their behavior in technological processes: evaluation of the grade (quality) of mineral raw materials; analysis of the behavior of minerals in the technological process with prediction of their technological properties; analysis of changes in the structure and properties of minerals in technological processes; operational analysis of mineral substances at various stages of technological processing. The article illustrates all aspects of the use of infrared spectroscopy at various stages of studying the material composition of mineral raw materials in its enrichment assessment by specific examples of solving problems arising from the technological redistribution of various types of ore and non-metallic minerals.
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Schetselaar, E. M., G. Bellefleur, and P. Hunt. Integrated analyses of density, P-wave velocity, lithogeochemistry, and mineralogy to investigate effects of hydrothermal alteration and metamorphism on seismic reflectivity: a summary of results from the Lalor volcanogenic massive-sulfide deposit, Snow Lake, Manitoba. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/327999.

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We present herein a summary of integrated data analyses aimed at investigating the effects of hydrothermal alteration on seismic reflectivity in the footwall of the Lalor volcanogenic massive-sulfide (VMS) deposit, Manitoba. Multivariate analyses of seismic rock properties, lithofacies, and hydrothermal alteration indices show an increase in P-wave velocity for altered volcanic and volcaniclastic lithofacies with respect to their least-altered equivalents. Scanning electron microscopy-energy dispersive X-ray spectrometry analyses of drill-core samples suggest that this P-wave velocity increase is due to the high abundance of high P-wave velocity aluminous minerals, including cordierite, Fe-Mg amphibole, and garnet, which in volcanic rocks are characteristic of VMS-associated hydrothermal alteration metamorphosed in the amphibolite facies. A seismic synthetic profile computed from a simple amphibolite-facies mineral assemblage model, consisting of mafic-felsic host rock contacts, a sulfide ore lens, and a discordant hydrothermal conduit, show enhanced seismic reflections at conduit-host rock contacts in comparison to the equivalent greenschist facies mineral assemblage model. Collectively our results suggest that VMS footwall hydrothermal alteration zones metamorphosed under middle- to upper-amphibolite facies conditions have enhanced potential for seismic detection.
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Pe-Piper, G., K. Wallace, and D. J. W. Piper. Electron microprobe and scanning electron microscope mineral analyses of diagenetic minerals from Lower Cretaceous reservoir sandstone, Scotian Basin, offshore Nova Scotia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2019. http://dx.doi.org/10.4095/313654.

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Pe-Piper, G., D. J. W. Piper, and A. Imperial. Electron microprobe mineral analyses from Carboniferous to Cretaceous igneous rocks offshore southeastern Canada and northeastern U.S.A. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2018. http://dx.doi.org/10.4095/306386.

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Pringle, G. J. MINREP: a FORTRAN computer program to produce tables of mineral analyses with formulae and end members. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/204899.

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Pe-Piper, G., D. J. W. Piper, and A. Imperial. Electron microprobe mineral analyses from Neoproterozoic to Carboniferous igneous rocks of the Cobequid Highlands, Nova Scotia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2019. http://dx.doi.org/10.4095/313485.

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Smith, I. R., S. J. A. Day, R C Paulen, and D. G. Pearson. Chemical studies of kimberlite indicator minerals from stream sediment and till samples in the southern Mackenzie region (NTS 85B, C, F, G), Northwest Territories, Canada. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/329080.

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Till (n=196) and stream sediment (n=60) samples were collected in the area south and west of Great Slave Lake, Northwest Territories (NTS 85B, C, F, and G), over the course of 3 summer field seasons. Samples were processed to recover kimberlite and other indicator minerals. This report summarizes results of the kimberlite indicator mineral (KIM) studies, including measures of KIM mineral types, abundances, and chemistry (major, trace, and rare earth elements). KIMs were present in 24% of the samples collected, and only 183 KIM grains in total were recovered, of which Cr-pyrope garnets were the most abundant (65.6%). Chemical analyses revealed strong similarities to the Drybones Bay and Mud Lake kimberlites which are situated 50 to >100 km to the northeast, roughly aligned with prominent glacially streamlined landform flowsets in this field area. Results suggest there is little evidence for undetected kimberlite outcrop or sub-crop in the study area.
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Lougheed, H. D., M. B. McClenaghan, D. Layton-Matthews, and M. I. Leybourne. Indicator minerals in fine-fraction till heavy-mineral concentrates determined by automated mineral analysis: examples from two Canadian polymetallic base-metal deposits. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328011.

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Exploration under glacial sediment cover is a necessary part of modern mineral exploration in Canada. Traditional indicator methods use visual examination to identify mineral grains in the 250 to 2000 µm fraction of till heavy-mineral concentrates (HMC). This study tests automated mineralogical methods using scanning electron microscopy to identify indicator minerals in the fine (<250 µm) HMC fraction of till. Automated mineralogy of polished grains from the fine HMC enables rapid data collection (10 000-300 000 grains/sample). Samples collected near two deposits were used to test this method: four from the upper-amphibolite facies Izok Lake volcanogenic massive-sulfide deposit, Nunavut, and five from the Sisson granite-hosted W-Mo deposit, New Brunswick. The less than 250 µm HMC fraction of till samples collected down ice of each deposit contain ore and alteration minerals typical of their deposit type. Sulfide minerals occur mainly as inclusions in oxidation-resistant minerals, including minerals previously identified in each deposit's metamorphic alteration halo, and are found to occur farther down ice than the grains identified visually in the greater than 250 µm HMC fraction. This project's workflow expands the detectable footprint for certain indicator minerals and enhances the information that can be collected from till samples.
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Ritcey, D. H., C. A. Evenchick, and K. T. Ratcliffe. Geochemical and heavy mineral analyses of the Bowser Lake and Sustut groups, north central British Columbia, Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2006. http://dx.doi.org/10.4095/221569.

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