Relevant bibliographies by topics / Pathfinder elements

Academic literature on the topic 'Pathfinder elements'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Pathfinder elements"

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Korshunova, Vera, and Marina Charykova. "Mobile Forms of Gold and Pathfinder Elements in Surface Sediments at the Novye Peski Gold Deposit and in the Piilola Prospecting Area (Karelia Region)." Minerals 9, no. 1 (January 11, 2019): 34. http://dx.doi.org/10.3390/min9010034.

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The success of prospecting for gold deposit in overburdened areas based on the using of secondary dispersion haloes mostly depends on the chosen method of geochemical survey (sampling horizon, sample preparation for analysis, etc.). At the same time, the geochemistry of gold in the supergene zone is insufficiently studied, especially it’s migration and concentration in association with other elements in surface sediments due to weathering of gold-bearing ore. The main aim of the study presented in this paper is the determination of mobile forms of gold and pathfinder elements (As, Cu, Ni, Ag, Zn, Pb, Se, Sb, Mo, Bi, and Te) in podzol soil and moraine in the areas of Karelia region with known gold mineralization. As a result of conducted experiments it was determined that the main mobile forms of gold are water-soluble and bound to organic matter, while pathfinder elements bound preferably to Fe and Mn(hydr)oxides and to organic matter. As gold and some pathfinders bind with organic matter, this form was considered in more detail, and the elements’ interaction with humic and fulvic acids was investigated. In addition, it was determined that the studied elements are quite “mobile” because the percentage of the mobile form in their total content was mostly more than 50%. The main features of the elements’ migration and concentration were identified in surface sediments of the study areas.
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Fuge, R., M. J. Andrews, and C. C. Johnson. "Chlorine and iodine, potential pathfinder elements in exploration geochemistry." Applied Geochemistry 1, no. 1 (January 1986): 111–16. http://dx.doi.org/10.1016/0883-2927(86)90042-9.

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Godfray, Godson. "Geochemical evaluation of the in situ regolith at Madengi Hill, Dodoma, Tanzania: implications for bedrock mapping and delineating gold mineralization targets." Geochemistry: Exploration, Environment, Analysis 22, no. 1 (November 24, 2021): geochem2021–074. http://dx.doi.org/10.1144/geochem2021-074.

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Successful gold exploration projects depend on a piece of clear information on the association between gold, trace elements and mineralization controlling factors. The use of soil geochemistry has been an important tool in pinpointing exploration targets during the early stage of exploration. This study aimed to establish the gold distribution, the elemental association between gold and its pathfinder elements such as Cu, Zn, Ag, Ni, Co, Mn, Fe, Cd, V, Cr, Ti, Sc, In and Se, and identify lithologies contributing to the overlying residual soils. From cluster analysis, a high similarity level of 53.93% has been shown with Ag, Cd and Se at a distance level of 0.92. Au and Se have a similarity level of 65.87% and a distance level of 0.68; hence, is proposed to be the most promising pathfinder element. Principal component analysis (PCA), factor analysis (FA) and the Pearson's correlation matrix of transformed data of V, Cu, Ni, Fe, Mn, Cr and Co, and a stronger correlation between Pb and U, Th, Na, K, Sn, Y, Ta and Be shows that source gold mineralization might be associated with both hornblende gneisses interlayered with quartzite, tonalite and tonalitic orthogneiss. From the contour map and gridded map of Au and its pathfinder elements, it has been noted that their anomalies and generated targets are localized in the northern part of the area. The targets trend ESE–WNW, nearly parallel to the shear zones as a controlling factor of Au mineralization emplacement.Supplementary material: Concentration data for each of the 44 elements analysed are available at https://doi.org/10.6084/m9.figshare.c.5721965
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Williams, Kevin W., and Kurt M. Joseph. "Developing Data Link User-Interface Designs Using Pilot Conceptual Networks." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 42, no. 1 (October 1998): 77–79. http://dx.doi.org/10.1177/154193129804200118.

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One hundred and forty-eight pilots were asked to categorize a list of flight-related data elements that could be sent via data link from an FAA automated flight service station to an aircraft or vice versa. The categorization was used to construct a matrix of proximity values for each of the data-element pairs so that a conceptual network of the elements could be constructed using the Pathfinder algorithm developed by Schvaneveldt, Durso, and Dearholt (1985). Additionally, pilots were asked to judge each data element according to how useful the element was for the functions of communication, navigation, and surveillance within the general aviation (GA) flight environment. Elements scoring high on each of these flight-related functions were then subjected to a Pathfinder analysis. The conceptual networks that were created as a result of these analyses are discussed in relation to the development of data link user interfaces for the GA cockpit.
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Korshunova, V. A., E. D. Lodygin, M. V. Charykova, and S. N. Chukov. "Interaction of soil humic acids with gold ions and pathfinder elements." IOP Conference Series: Earth and Environmental Science 862, no. 1 (October 1, 2021): 012022. http://dx.doi.org/10.1088/1755-1315/862/1/012022.

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Grozdev, Valentin, Rossitsa Vassileva, and Irena Peytcheva. "The rare earth elements in zircons as pathfinder of geological events." Review of the Bulgarian Geological Society 83, no. 3 (December 2022): 93–96. http://dx.doi.org/10.52215/rev.bgs.2022.83.3.93.

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The usual main purpose of the zircon investigation is to determine the precise age of particular rocks, applying the U-Pb isotope method. In this study we attempt to reveal the vast potential of zircons in understanding the magmatic and modification processes, as well as the structure of the deeper Earth’s interior, using the analysis of the zircon population of the major volcanic variety in the Ruen tectono-magmatic zone, Kyustendil area, SW Bulgaria. The ascending magmas crosscut different rock types and units along their path to the Earth’s surface. Using the zircon crystal analysis, we may make consideration about the age and chemical characteristics of these units. The trace and rare earth element (REE) content of the zircons brings insights for the rock formation time and discloses characteristics of the deeper parts of the Earth’s crust.
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Joyce, Nicholas, Daniel Layton-Matthews, Kurt Kyser, Matthew Leybourne, Kevin Ansdell, Tom Kotzer, David Quirt, and Gerard Zaluski. "Alteration mineralogy and pathfinder element inventory in the footprint of the McArthur River unconformity-related uranium deposit, Canada." Canadian Mineralogist 59, no. 5 (September 1, 2021): 985–1019. http://dx.doi.org/10.3749/canmin.2000067.

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ABSTRACT Pathfinder elements associated with the exploration footprint of the McArthur River unconformity-related U deposit include U, radiogenic Pb, V, Ni, Co, Cu, Mo, As, Zn, and rare earth elements. In this study, the mineralogical and paragenetic context for their occurrence was established by integrating in situ mineral chemistry and laser ablation mass spectrometry chemical mapping of interstitial assemblages, detrital grains, and cements with whole-rock analyses of drill core samples from the diagenetically altered background and the hydrothermally altered sandstone host rocks. Diagenetically altered background sandstones contain a matrix assemblage of illite and dickite, with trace to minor aluminum-phosphate-sulfate (APS) minerals, apatite, and Fe-Ti oxide minerals. Aluminum-phosphate-sulfate minerals account for the majority of the Sr and light rare earth element concentrations, whereas early diagenetic apatite, monazite, and apatite inclusions in detrital quartz and detrital zircon contribute significant U and heavy rare earth elements to samples analyzed with an aggressive leach (partial digestion) such as aqua regia. Hydrothermally altered sandstone host rocks also contain variable assemblages of Al-Mg chlorite (sudoite), alkali-deficient tourmaline, APS minerals, kaolinite, illite, Fe-oxide, and sulfide minerals. Late pre-mineralization chlorite accounts for a significant portion of the observed Ni concentrations, whereas Co, Cu, Mo, and Zn occur predominantly in cryptic sub-micron sulfide and sulfarsenide inclusions within clay mineral aggregates and in association with Fe-Ti oxides. Elevated concentrations of U were observed in cryptic micro-inclusions associated with sulfides in quartz overgrowths, with Fe-Ti oxide micro-inclusions in kaolinite, and in post-mineralization Fe-oxide veins. The distribution of pathfinder elements throughout the deposit footprint appears to be less related to the primary dispersion of alteration minerals from the hydrothermal system than to the secondary dispersion of elements post-mineralization. Their occurrence throughout pre-, syn-, and post-mineralization assemblages further demonstrates the limitations to defining geochemical footprints from pathfinder element concentrations expressed in lithogeochemical data sets without structural, lithological, and mineralogical context.
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Balaram, V., and S. S. Sawant. "Indicator Minerals, Pathfinder Elements, and Portable Analytical Instruments in Mineral Exploration Studies." Minerals 12, no. 4 (March 23, 2022): 394. http://dx.doi.org/10.3390/min12040394.

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Until recently, the classic approach to mineral exploration studies was to bring the field samples/drill cores collected during field studies to the laboratory, followed by laborious analysis procedures to generate the analytical data. This is very expensive, time-consuming, and difficult for exploring vast areas. However, rapid technological advances in field-portable analytical instruments, such as portable visible and near-infrared spectrophotometers, gamma-ray spectrometer, pXRF, pXRD, pLIBS, and µRaman spectrometer, have changed this scenario completely and increased their on-site applications in mineral exploration studies. LED fluorimeter is a potential portable tool in the hydrogeochemical prospecting studies of uranium. These instruments are currently providing direct, rapid, on-site, real-time, non-destructive, cost-effective identification, and determination of target elements, indicator minerals and pathfinder elements in rock, ore, soil, sediment, and water samples. These portable analytical instruments are currently helping to obtain accurate chemical and mineralogical information directly in the field with minimal or no sample preparation and providing decision-making support during fieldwork, as well as during drilling operations in several successful mineral exploration programs. In this article, the developments in these portable devices, and their contributions in the platinum group elements (PGE), rare earth elements (REE), gold, base metals, and lithium exploration studies both on land and on the ocean bed, have been summarized with examples.
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Osei, K. P., M. Affam, C. Kusi-Manu, and D. T. Kwapong. "Multivariate Statistical Evaluation of Geochemical Data from Quartz Vein-Associated Gold Mineralisation at the Badukrom Prospect within the Tarkwaian Base." Ghana Mining Journal 21, no. 1 (June 30, 2021): 22–30. http://dx.doi.org/10.4314/gm.v21i1.3.

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The Kawere conglomerate at the base of the Tarkwaian Group in the Iduapriem Mine appears to show good prospect for hydrothermal gold mineralisation evidenced by major structures mapped from magnetic and Airborne Electromagnetic (AEM) geophysical data. Detailed geological mapping and sampling at Badukrom target which lies within the Kawere rocks confirm the presence of multiple structures as well as quartz veins indicative of potential hydrothermal gold mineralisation. Follow up soil sampling conducted within the area revealed a strong anomalous trend from the southern portion. Two diamond drilled (DD) holes pushed to delineate the extent of the anomalous zones returned narrow veins of significant gold intersections. Twenty-five (25) samples of the Badukrom hydrothermal Au mineralisation intersects were sent for analysis to ascertain the optimum pathfinder element suite for the hydrothermal targets within the Iduapriem concession. A total of fifty-nine elements were analysed via ICP-MS and ICP-OES. Multivariate statistical evaluation was carried out on the results to understand the geochemical associations of Au and the other elements to aid future exploration programmes planned for the hydrothermal targets. Multivariate analysis of the geochemical data using Pearson product-moment of correlation suggests a stronger positive correlation of gold with Iron, Antimony, Sulphur, Chromium, Vanadium respectively. However, the Spearman Rank correlation data indicates that, the optimum pathfinder elements for hydrothermal Au are: As, Sb and Te. Keywords: Tarkwaian Base, Statistical Evaluation, Hydrothermal Mineralisation, Geochemical Data
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Carocci, Eleonora, Christian Marignac, Michel Cathelineau, Laurent Truche, Andreï Lecomte, and Filipe Pinto. "Rutile from Panasqueira (Central Portugal): An Excellent Pathfinder for Wolframite Deposition." Minerals 9, no. 1 (December 24, 2018): 9. http://dx.doi.org/10.3390/min9010009.

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Abundant W-rich rutile in the tourmalinized wall-rocks from the Panasqueira W-deposit appears to be a marker of the onset of the main wolframite depositing event. Rutile displays spectacular zoning, both sector (SZ) and oscillatory (OZ). An extensive set of compositional data obtained on crystals, beforehand studied using back-scattered electron images and X-ray maps, was used to address (i) the effects of SZ on differential trapping of minor elements, and (ii) the significance of the OZ in deciphering fluid sources and fluid circulation dynamics. Particular attention was paid to Sn, W (Nb, Ta) concentrations in rutile as pathfinders of the W deposition. Concerning the sector zoning, W is more incorporated than (Nb, Ta) onto more efficient faces, whereas Sn contents are nearly not impacted. The net effect of the sector zoning is thus a progressive increase of the relative weight of Sn from pyramid to prism faces, in combination with a less significant increase in the relative weight of Nb + Ta. The oscillatory zoning concerns most minor elements: W, Nb (Ta), Fe, V, Cr and Sn. In the frequent doublets, the clear bands are in general enriched in W relatively to the dark ones, whereas the inverse is true for Nb and Ta. The doublets may be viewed as the result of the successive influx of (i) a W-rich, Nb + Ta poor fluid, abruptly replaced by (or mixed to) (ii) a Nb + Ta-rich and W-poor fluid. The Nb + Ta-rich fluid could be in turn related to a rare-metal granite layer observed atop of the Panasqueira granite.
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Dissertations / Theses on the topic "Pathfinder elements"

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Fulcher, Jared T. "A DESIGN PATHFINDER WITH MATERIAL CORRELATION POINTS FOR INFLATABLE SYSTEMS." UKnowledge, 2014. http://uknowledge.uky.edu/me_etds/39.

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The incorporation of inflatable structures into aerospace systems can produce significant advantages in stowed volume to mechanical effectiveness and overall weight. Many applications of these ultra-lightweight systems are designed to precisely control internal or external surfaces, or both, to achieve desired performance. The modeling of these structures becomes complex due to the material nonlinearities inherent to the majority of construction materials used in inflatable structures. Furthermore, accurately modeling the response and behavior of the interfacing boundaries that are common to many inflatable systems will lead to better understanding of the entire class of structures. The research presented involved using nonlinear finite element simulations correlated with photogrammetry testing to develop a procedure for defining material properties for commercially available polyurethane-coated woven nylon fabric, which is representative of coated materials that have been proven materials for use in many inflatable systems. Further, the new material model was used to design and develop an inflatable pathfinder system which employs only internal pressure to control an assembly of internal membranes. This canonical inflatable system will be used for exploration and development of general understanding of efficient design methodology and analysis of future systems. Canonical structures are incorporated into the design of the phased pathfinder system to allow for more universal insight. Nonlinear finite element simulations were performed to evaluate the effect of various boundary conditions, loading configurations, and material orientations on the geometric precision of geometries representing typical internal/external surfaces commonly incorporated into inflatable pathfinder system. The response of the inflatable system to possible damage was also studied using nonlinear finite element simulations. Development of a correlated material model for analysis of the inflatable pathfinder system has improved the efficiency of design and analysis techniques of future inflatable structures.
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Kunicka, Beata Iwona. "Spacecraft dynamic analysis and correlation with test results : Shock environment analysis of LISA Pathfinder at VESTA test bed." Thesis, Luleå tekniska universitet, Rymdteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62910.

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The particular study case in this thesis is the shock test performed on the LISA Pathfinder satellite conducted in a laboratory environment on a dedicated test bed: Vega Shock Test Apparatus (VESTA). This test is considered fully representative to study shock levels produced by fairing jettisoning event at Vega Launcher Vehicle, which induces high shock loads towards the satellite. In the frame of this thesis, some transient response analyses have been conducted in MSC Nastran, and a shock simulation tool for the VESTA test configuration has been developed. The simulation tool is based on Nastran Direct Transient Response Analysis solver (SOL 109), and is representative of the upper composite of Vega with the LISA Pathfinder coupled to it. Post-processing routines of transient response signals were conducted in Dynaworks which served to calculate Shock Response Spectra (SRS). The simulation tool is a model of forcing function parameters for transient analysis which adequately correlates with the shock real test data, in order to understand how the effect of shock generated by the launcher is seen in the satellite and its sub-systems. Since available computation resources are limited the parameters for analysis were optimised for computation time, file size, memory capacity,  and model complexity. The forcing function represents a release of the HSS clamp band which is responsible for fairing jettisoning, thus the parameters which were studied are mostly concerning the modelling of this event. Among many investigated, those which visibly improved SRS correlation are radial forcing function shape, implementation of axial impulse, clamp band loading geometry and refined loading scheme. Integration time step duration and analysis duration were also studied and found to improve correlation.  From each analysis, the qualifying shock environment was then derived by linear scaling in proportion of the applied preload, and considering a qualification margin of 3dB. Consecutive tracking of structural responses along shock propagation path exposed gradual changes in responses pattern and revealed an important property that a breathing mode (n = 0) at the base of a conical Adapter translates into an axial input to the spacecraft. The parametrisation itself was based on responses registered at interfaces located in near-field (where the clamp band is located and forcing function is applied) and medium-field with respect to the shock event location. Following shock propagation path, the final step was the analysis of shock responses inside the satellite located in a far-field region, which still revealed a very good correlation of results. Thus, it can be said that parametrisation process was adequate, and the developed shock simulation tool can be qualified. However, due to the nature of shock, the tool cannot fully replace VESTA laboratory test, but can support shock assessment process and preparation to such test. In the last part of the thesis, the implementation of some finite element model improvements is investigated. Majority of the panels in spacecraft interior exhibited shock over-prediction due to finite element model limitation. Equipment units modelled as lump masses rigidly attached with RBE2 elements to the panel surface are a source of such local over-predictions. Thus, some of the units were remodelled and transient responses were reinvestigated. It was found that remodelling with either solid elements, or lump mass connected to RBE3 element and reinforced by RBE2 element, can significantly improve local transient responses. This conclusion is in line with conclusions found in ECSS Shock Handbook.
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Thomas, B. J. "Trace elements in magnetite and hematite for improving pathfinder element selection of the Hillside copper mineralisation, Yorke Peninsula." Thesis, 2010. http://hdl.handle.net/2440/106278.

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The Hillside deposit is located in the southern part of the Olympic Province on the Gawler Craton, South Australia. This area has a history of IOCG-U style deposits, including the world class Olympic Dam deposit. Several other deposits and prospects have also been identified within this Olympic Dam domain. The Hillside deposit was discovered in the 1800s but recent work by Rex Minerals has expanded the mineralisation zone and have categorised this deposit as part of the IOCG-U family. A prominent characteristic of the Hillside IOCG mineralisation is the conversion of magnetite to hematite which in previous works on IOCG-U deposits was shown to be related to the mineralisation process. Two main mineralizing episodes can be distinguished, an earlier one was extremely Fe rich and allowed the formation of magnetite and pyrite. The second stage of mineralisation involved the injection of copper mineralizing fluids concurrent with the widespread replacement of magnetite by hematite. Analysis of the iron oxides was carried out using optical methods as well as trace element and rare earth element analysis by Electron Probe Micro Analysis and Laser Ablation ICP MS. The trace elements were used to identify compositional signature variations between the different iron oxide minerals. The rare earth element analysis showed a distinct overall enrichment in the hematite samples compared to the magnetite. The trace element analysis showed that several elements are distributed differently between the two oxides and sulphides. These elements include Cr, Zn, V, Ti, Ni, Pb and Co which show anomalies in both the oxides and sulphides. A variation between what elements are enriched is dependent on the mineral they are found within. This is suggested to reflect changes in composition of the mineralising fluid from the early magnetite-pyrite to the late hematite-chalcopyrite stage. The sulphides showed that chalcopyrite was enriched in several trace elements compared to pyrite. Sulphur isotope data were derived for pyrite and chalcopyrite also to characterise the source of the fluids. There was no systematic difference between chalcopyrite and pyrite. The data did show negative values between -2.6 δ34S and -6.6 δ34S which indicates that the source of the sulphur is most likely magmatic. This study gives an indication into the change in conditions that caused the replacement of magnetite by hematite and therefore the changes that caused mineralisation. An element signature was also collected to identify the difference between the iron oxides that will help in future works on this deposit.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2010
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Lockheed, A. E. "Finding blind orebodies: geochemical exploration for large nickel-copper and PGE sulphides on the Western Gawler Craton." Thesis, 2003. http://hdl.handle.net/2440/123524.

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The search for economically viable ore deposits focuses increasingly on deeply buried deposits. This study was designed to highlight specific mafic/ultramafic igneous bodies in the western Gawler Craton, near Streaky Bay, South Australia, through the analysis of the behaviour of pathfinder elements within the regolith above anomalous aeromagnetic targets. In particular, the possibility of developing a rapid and inexpensive means of characterising the intrusions at depth by looking within the calcareous sediments located within the top two to twelve metres of regolith was evaluated. Data from 26 of the 53 holes drilled were analysed, covering an area of approximately 214 km2. This area covers a diverse lithological basement including ultramafics, gabbros, granitoids and felsic gneisses and is located near a strong magnetic anomaly. Given the significant difference in basement lithology of the target bodies (mafic to ultramafic) versus the variably magnetic felsic to intermediate granitoids, pathfinder elements including Ni, Cu, Cr, Mn and V, which are elevated in mafic to ultramafic rocks, were targeted. Depth plots and ratios of the transition elements are shown with simple graphing techniques are used to illustrate the behaviour of geochemical signatures throughout the profile and to display any correlation between basement rocks and the regolith. There was no discernible anomaly in any trace metals throughout the calcrete of the uppermost regolith unit. Calcrete pathfinder element abundances are uniformly low, which is to be expected, as the sediments are up to 75% carbonate, and any basement detrital signature is highly diluted. In the majority of holes, however, an abrupt increase in these element values occurred at the base of the calcrete or a few metres deeper within ferruginous sediments. The increase in values occurred in Ni, Cu and Cr, but was most prominent in V. This pattern is reflected in the plots for the basement saprolitic material. Unfortunately, sampling of the oxidised zones requires expensive and time­consuming air-core drilling through up to twelve metres of calcrete, and in places soft, unconsolidated sands. More detailed geochemical analyses of the calcrete layers in the 26 holes were undertaken to try to establish a method of identifying the basement lithology from the calcrete chemical data. Absolute abundances of pathfinder elements are too low in the calcrete to be useful in distinguishing differences in basement lithology. While calcareous sediments may contain subtle geochemical indicators of the differences in basement lithology, it alone is not adequate to confidently predict the basement lithology for drilling. Below the calcrete, within the oxidised zone, the geochemical anomalies are large enough to confidently conclude whether the basement is mafic or felsic.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2003
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Books on the topic "Pathfinder elements"

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Hanley, Jacob James. Distribution of the halogens in Sudbury breccia matrix as pathfinder elements for footwall Cu-Pge mineralization at the Fraser Cu Zone, Barnet main copper zone, and surrounding margin of the Sudbury igneous complex, Onapine-Levack area, Ontario, Canada. 2002.

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Free-suspension residual flexibility testing of space station Pathfinder: Comparison to fixed-base results. [Washington, DC: National Aeronautics and Space Administration, 1998.

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United States. National Aeronautics and Space Administration., ed. Free-suspension residual flexibility testing of space station Pathfinder: Comparison to fixed-base results. [Washington, DC: National Aeronautics and Space Administration, 1998.

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United States. National Aeronautics and Space Administration., ed. Free-suspension residual flexibility testing of space station Pathfinder: Comparison to fixed-base results. [Washington, DC: National Aeronautics and Space Administration, 1998.

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United States. National Aeronautics and Space Administration., ed. Free-suspension residual flexibility testing of space station Pathfinder: Comparison to fixed-base results. [Washington, DC: National Aeronautics and Space Administration, 1998.

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Book chapters on the topic "Pathfinder elements"

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Luis Manrique Carreño, John. "Geochemistry Applied to the Exploration of Mineral Deposits." In Geochemistry [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.103941.

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Geochemistry can be applied to the exploration of mineral deposits, for which it is necessary to understand the fundamentals of geochemical prospecting, the geochemical dispersion of elements based on their chemical properties. This chapter presents the basics of geochemical prospecting including: element mobility depending on ionic potential, pH, and Eh, with examples of Cu mobility during supergenic alteration of a primary sulfide deposit, a brief overview of sampling/geochemical prospecting methods, as well as a case study of the geochemical prospecting study carried out in the vanadium (V), uranium (U), and zinc (Zn) sedimentary mineral deposit of Puyango, Ecuador, in which anomalous and subanomalous values were detected in rock samples of various pathfinder elements of V and U.
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Iversen, Gunnar. "A Sámi in Hollywood: Nils Gaup’s Transnational and Generic Negotiations." In Nordic Film Cultures and Cinemas of Elsewhere, 157–68. Edinburgh University Press, 2019. http://dx.doi.org/10.3366/edinburgh/9781474438056.003.0012.

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This chapter examines Norwegian film director Nils Gaup, who made several international productions, starting with the adventure film Shipwrecked (Håkon Håkonson, 1990), co-produced by Disney. Gaup’s international films are rich examples of the circulation and appropriation of ideas in inter- and transnational genre films. Shipwrecked and Tashunga/North Star (1996) constitute attempts to create a Euro-Hollywood production that reimagines the adventure film or the western genre. The genre elements of the Western were honed by Gaup in his Oscar-winning film about an ancient Sámi legend Ofelaš (Pathfinder, 1987); Gaup has since made several feature length films set in Sápmi that evoke well-known Hollywood genre stipulations, such as the historical epic Kautokeino-Oppøret (The Kautokeino Rebellion, 2008) and Glassdukkene (Glass Dolls, 2014). Shipwrecked and Tashunga are Gaup’s most ambitious attempts to negotiate between international genre elements and aspects of Sámi or Norwegian culture.
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Conference papers on the topic "Pathfinder elements"

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Chakraborty, Rupsa, Gabor Kereszturi, Patricia Durance, Reddy Pullanagari, Salman Ashraf, and Chris Anderson. "Biogeochemical Exploration of Gold Mineralization and its Pathfinder Elements Using Hyperspectral Remote Sensing." In IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2020. http://dx.doi.org/10.1109/igarss39084.2020.9323737.

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A. Veshev, S., N. A. Voroshilov, K. I. Stepanov, G. N. Mikhailov, A. P. Savitsky, and O. F. Putikov. "Experience in the Search for Hydrocarbons by Investigating Forms of Occurrences of Pathfinder Elements." In 61st EAGE Conference and Exhibition. European Association of Geoscientists & Engineers, 1999. http://dx.doi.org/10.3997/2214-4609.201408042.

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Vetturi, David, Matteo Lancini, and Ileana Bodini. "How Geometrical Tolerances Affect the Measurement of Reciprocal Alignment of Two Different Assemblies: A Case Study." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24759.

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Often a designer has the problem to apply a suitable system of geometrical and dimensional tolerances to an assembly. The right solution is not unique, in fact it depends on the chosen parameters. If the tolerances have to be optimized, some important parameters have to be taken into account, e.g. the efficiency of each prescription, or if this last is reachable, or it can be verified and how much the realization costs. The authors opinion is that a statistical approach based on the Monte Carlo Method is very useful when the tolerances chains are complex. This paper shows an application of this method in order to verify the functional alignment between two assemblies and a critical analysis of the uncertainty in phase both of the component design and test. This study has been developed thanks to the strict requirements imposed by ESA (European Space Agency) on the components that Thales Alenia Space has to realize within the LISA Pathfinder experiment. The very critical aspect of this work is to reciprocally align two cylindrical elements of two different assemblies. The specifications require 100 μm as maximum linear displacement and 300 μrad as maximum angular displacement. Moreover this prescriptions have to be verified also when the two elements are independently moving. To be able to reach such strict accuracy level the components have been assembled in an ISO 100 class cleanroom and the work space was a 3D Coordinate-Measuring Machine (CMM). The cylindrical elements have a 10 mm diameter, so the value of the measurement uncertainty associated with the alignment check is fundamental. Starting from the different uncertainty sources, the measurability and verifiability of the alignment have been considered and evaluated. The overall uncertainty has been assessed by numerical simulations which have taken into account the dimensional, geometrical and form tolerances as well as the instrumental uncertainty of the 3D CMM. This estimation has been positively validated by a session of repeated measurements. Numerical simulations have also allowed performing a sensitivity analysis, in order to give information about which sources more contribute to the overall uncertainty.
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Feinberg, Lee D., Ritva Keski-Kuha, Charlie Atkinson, Andrew Booth, and Tony Whitman. "James Webb Space Telescope (JWST) Optical Telescope Element (OTE) Pathfinder status and plans." In SPIE Astronomical Telescopes + Instrumentation, edited by Jacobus M. Oschmann, Mark Clampin, Giovanni G. Fazio, and Howard A. MacEwen. SPIE, 2014. http://dx.doi.org/10.1117/12.2054782.

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Feinberg, Lee D., Ritva Keski-Kuha, Charlie Atkinson, and Scott C. Texter. "Use of a pathfinder optical telescope element for James Webb Space Telescope risk mitigation." In SPIE Astronomical Telescopes + Instrumentation, edited by Jacobus M. Oschmann, Jr., Mark C. Clampin, and Howard A. MacEwen. SPIE, 2010. http://dx.doi.org/10.1117/12.855800.

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PARIKH, PARESH, SHAHYAR PIRZADEH, RAINALD LOHNER, and CLYDE GUMBERT. "Numerical solutions on a Pathfinder and other configurations using unstructured grids and a finite element solver." In 27th Aerospace Sciences Meeting. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1989. http://dx.doi.org/10.2514/6.1989-362.

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Barrote, Vitor, Ashlea Wainwright, and Oliver Nebel. "Monazite, Accessory (to the) Regional Manager: Simultaneous multi-isotopic and elemental analysis of monazite as pathfinder for VHMS mineralization." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.5666.

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Tinker, Michael L., and Malcolm A. Cutchins. "Model Correlation Issues in Residual Flexibility Testing." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-4262.

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Abstract Application of the free-suspension residual flexibility modal test method raises some interesting issues and problems for the correlation of finite element models to test data. This paper presents a discussion of some of those issues as related to testing and analysis of two structures. One of these test articles is the International Space Station Pathfinder, a large structure similar in size and weight to the Space Station Resource Node. The approach used by the authors to correlate models to residual flexibility data is presented, along with mode shape and frequency response results which illustrate the structural dynamic behavior of the models before and after the updating process. Frequency response functions (FRF) for the regions of the structure that interface with the environment (a test fixture or another structure) are shown to be the primary tools for model correlation that distinguish or characterize the residual flexibility approach. A number of critical issues related to use of the structure interface FRF for correlating the model are then identified and discussed, including (1) the requirement of prominent stiffness lines, (2) overcoming problems with measurement noise which makes the antiresonances or minima in the functions difficult to identify, and (3) the use of interface stiffness and lumped mass perturbations to bring the analytical responses into agreement with test data. It is shown that good comparison of analytical-to-experimental FRF is the key to obtaining good agreement of the residual flexibility values.
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Reports on the topic "Pathfinder elements"

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Plouffe, A., and S. P. Williams. Regional till geochemistry, gold and pathfinder elements, northern Nechako River, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1998. http://dx.doi.org/10.4095/210023.

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Jones, R. Criticality safety evaluation for pathfinder fuel elements in model No. RA-3 shipping containers. Office of Scientific and Technical Information (OSTI), February 1990. http://dx.doi.org/10.2172/7229657.

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Jones, R. R. Criticality safety evaluation for Pathfinder fuel elements in Model No. RA-3 shipping containers: Revision 1. Office of Scientific and Technical Information (OSTI), January 1989. http://dx.doi.org/10.2172/6432432.

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Hulbert, L. J. A geochemical investigation of mafic-ultramafic intrusions for metallogenic pathfinder elements in the La Ronge-Lynn Lake greenstone belt: an overview. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/205418.

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Dunn, C. E., and N. L. Hastings. Biogeochemical survey of the Fraser Lake area using outer bark of Lodgepole pine (NTS 93K02/03): base metals, gold, and pathfinder elements, central British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1999. http://dx.doi.org/10.4095/210374.

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Dunn, C. E., and N. L. Hastings. Biogeochemical survey of the Ootsa-François lakes area using outer bark of Lodgepole Pine (NTS 93F/13, 14, and part of 12), base metals and pathfinder elements, north central British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1998. http://dx.doi.org/10.4095/209913.

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Dunn, C. D., and N. L. Hastings. Biogeochemical survey of the Nechako River area using outer back of Lodgepole pine (NTS 93 F/9, 93 F/10, 93 F/15, 93 F/16 and parts of 93 F/11, 93 F/14, 93 K/1 and 93 K/2), base metals, silver, and pathfinder elements, central British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/211475.

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Ames, D. E., and M. G. Houlé. Targeted Geoscience Initiative 4: Canadian nickel-copper-platinum group elements-chromium ore systems -- fertility, pathfinders, new and revised models. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/296674.

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Training service providers on emergency contraception: Lessons learned from an OR study. Population Council, 2002. http://dx.doi.org/10.31899/rh2002.1004.

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The Bangladesh Directorate of Family Planning in collaboration with the Population Council, Pathfinder International, and John Snow, Inc. is conducting an operations research project to test the feasibility of introducing emergency contraceptive pills (ECP) in the national family planning (FP) program and to answer operational questions on implementing the use of ECP efficiently. In Bangladesh, 1.2 million births are unplanned and the number of menstrual regulation/abortions is increasing. ECP could be a good reproductive health intervention for women since it gives them a chance to avoid unwanted pregnancy. ECP does not induce abortion. In fact, it helps in reducing the number of abortions. In Bangladesh, emergency contraception is relatively new and there is general lack of knowledge even among doctors. Thus, training providers will be a critical element for the introduction of ECP. The present feasibility study, detailed in this research update, has been undertaken to answer operational questions that need to be addressed while introducing ECP in the national FP program. The study has been carried out in two districts, Tangail and Mymensingh.
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