Relevant bibliographies by topics / Trace element thermometry

Academic literature on the topic 'Trace element thermometry'

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

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Journal articles on the topic "Trace element thermometry"

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Pickles, Jonathan R., Jonathan D. Blundy, and Richard A. Brooker. "Trace element thermometry of garnet-clinopyroxene pairs." American Mineralogist 101, no. 6 (June 2016): 1438–50. http://dx.doi.org/10.2138/am-2016-5427.

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Abbott, Richard N. "Trace element thermometry of garnet-clinopyroxene pairs, revisited." American Mineralogist 103, no. 7 (July 1, 2018): 1169–71. http://dx.doi.org/10.2138/am-2018-6487.

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Zaccarini, Federica, Giorgio Garuti, George L. Luvizotto, Yuri de Melo Portella, and Athokpam K. Singh. "Testing Trace-Element Distribution and the Zr-Based Thermometry of Accessory Rutile from Chromitite." Minerals 11, no. 7 (June 22, 2021): 661. http://dx.doi.org/10.3390/min11070661.

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Trace element distribution and Zr-in-rutile temperature have been investigated in accessory rutile from stratiform (UG2, Merensky Reef, Jacurici), podiform (Loma Peguera), and metamorphic chromitites in cratonic shields (Cedrolina, Nuasahi). Rutile from chromitite has typical finger-print of Cr-V-Nb-W-Zr, whose relative abundance distinguishes magmatic from metamorphic chromitite. In magmatic deposits, rutile precipitates as an intercumulus phase, or forms by exsolution from chromite, between 870 °C and 540 °C. The Cr-V in rutile reflects the composition of chromite, both Nb and Zr are moderately enriched, and W is depleted, except for in Jacurici, where moderate W excess was a result of crustal contamination of the mafic magma. In metamorphic deposits, rutile forms by removal of Ti-Cr-V from chromite during metamorphism between 650 °C and 400 °C, consistent with greenschist-amphibolite facies, and displays variable Cr-Nb, low V-Zr, and anomalous enrichment in W caused by reaction with felsic fluids emanating from granitoid intrusions. All deposits, except Cedrolina, contain Rutile+PGM composite grains (<10 µm) locked in chromite, possibly representing relics of orthomagmatic assemblages. The high Cr-V content and the distinctive W-Nb-Zr signature that typifies accessory rutile in chromitite provide a new pathfinder to trace the provenance of detrital rutile in placer deposits.
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Crow, Carolyn A., Kevin D. McKeegan, and Desmond E. Moser. "Coordinated U–Pb geochronology, trace element, Ti-in-zircon thermometry and microstructural analysis of Apollo zircons." Geochimica et Cosmochimica Acta 202 (April 2017): 264–84. http://dx.doi.org/10.1016/j.gca.2016.12.019.

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Zhu, Ren Z., Pei Ni, Jun Y. Ding, Guo G. Wang, Ming S. Fan, and Su N. Li. "Metasomatic Processes in the Lithospheric Mantle Beneath the No. 30 Kimberlite (Wafangdian Region, North China Craton)." Canadian Mineralogist 57, no. 4 (July 15, 2019): 499–517. http://dx.doi.org/10.3749/canmin.1800066.

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AbstractThis paper presents the first major and trace element compositions of mantle-derived garnet xenocrysts from the diamondiferous No. 30 kimberlite pipe in the Wafangdian region, and these are used to constrain the nature and evolution of mantle metasomatism beneath the North China Craton (NCC). The major element data were acquired using an electron probe micro-analyzer and the trace element data were obtained using laser ablation inductively coupled plasma-mass spectrometry. Based on Ni-in-garnet thermometry, equilibrium temperatures of 1107–1365 °C were estimated for peridotitic garnets xenocrysts from the No. 30 kimberlite, with an average temperature of 1258 °C, and pressures calculated to be between 5.0 and 7.4 GPa. In a CaO versus Cr2O3 diagram, 52% of the garnets fall in the lherzolite field and 28% in the harzburgite field; a few of the garnets are eclogitic. Based on rare earth element patterns, the lherzolitic garnets are further divided into three groups. The compositional variations in garnet xenocrysts reflect two stages of metasomatism: early carbonatite melt/fluid metasomatism and late kimberlite metasomatism. The carbonatite melt/fluids are effective at introducing Sr and the light rare earth elements, but ineffective at transporting much Zr, Ti, Y, or heavy rare earth elements. The kimberlite metasomatic agent is highly effective at element transport, introducing, e.g., Ti, Zr, Y, and the rare earth elements. Combined with compositional data for garnet inclusions in diamonds and megacrysts from the Mengyin and Wafangdian kimberlites, we suggest that these signatures reflect a two-stage evolution of the sub-continental lithospheric mantle (SCLM) beneath the NCC: (1) early-stage carbonatite melt/fluid metasomatism resulting in metasomatic modification of the SCLM and likely associated with diamond crystallization; (2) late-stage kimberlite metasomatism related to the eruption of the 465 Ma kimberlite.
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de Winter, Niels J., Johan Vellekoop, Robin Vorsselmans, Asefeh Golreihan, Jeroen Soete, Sierra V. Petersen, Kyle W. Meyer, Silvio Casadio, Robert P. Speijer, and Philippe Claeys. "An assessment of latest Cretaceous <i>Pycnodonte vesicularis</i> (Lamarck, 1806) shells as records for palaeoseasonality: a multi-proxy investigation." Climate of the Past 14, no. 6 (June 8, 2018): 725–49. http://dx.doi.org/10.5194/cp-14-725-2018.

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Abstract. In order to assess the potential of the honeycomb oyster Pycnodonte vesicularis for the reconstruction of palaeoseasonality, several specimens recovered from late Maastrichtian strata in the Neuquén Basin (Argentina) were subject to a multi-proxy investigation, involving scanning techniques and trace element and isotopic analysis. Combined CT scanning and light microscopy reveals two calcite microstructures in P. vesicularis shells (vesicular and foliated calcite). Micro-XRF analysis and cathodoluminescence microscopy show that reducing pore fluids were able to migrate through the vesicular portions of the shells (aided by bore holes) and cause recrystallization of the vesicular calcite. This renders the vesicular portions not suitable for palaeoenvironmental reconstruction. In contrast, stable isotope and trace element compositions show that the original chemical composition of the foliated calcite is well-preserved and can be used for the reconstruction of palaeoenvironmental conditions. Stable oxygen and clumped isotope thermometry on carbonate from the dense hinge of the shell yield sea water temperatures of 11°C, while previous TEX86H palaeothermometry yielded much higher temperatures. The difference is ascribed to seasonal bias in the growth of P. vesicularis, causing warm seasons to be underrepresented from the record, while TEX86H palaeothermometry seems to be biased towards warmer surface water temperatures. The multi-proxy approach employed here enables us to differentiate between well-preserved and diagenetically altered portions of the shells and provides an improved methodology for reconstructing palaeoenvironmental conditions in deep time. While establishing a chronology for these shells was complicated by growth cessations and diagenesis, cyclicity in trace elements and stable isotopes allowed for a tentative interpretation of the seasonal cycle in late Maastrichtian palaeoenvironment of the Neuquén Basin. Attempts to independently verify the seasonality in sea water temperature by Mg ∕ Ca ratios of shell calcite are hampered by significant uncertainty due to the lack of proper transfer functions for pycnodontein oysters. Future studies of fossil ostreid bivalves should target dense, foliated calcite rather than sampling bulk or vesicular calcite. Successful application of clumped isotope thermometry on fossil bivalve calcite in this study indicates that temperature seasonality in fossil ostreid bivalves may be constrained by the sequential analysis of well-preserved foliated calcite samples using this method.
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Tobelko, D. P., M. V. Portnyagin, S. P. Krasheninnikov, E. N. Grib, and P. Yu Plechov. "Compositions and formation conditions of primitive magmas of the Karymsky volcanic center, Kamchatka: evidence from melt inclusions and trace-element thermobarometry." Петрология 27, no. 3 (May 19, 2019): 258–81. http://dx.doi.org/10.31857/s0869-5903273258-281.

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This paper reports the results of a study of naturally and experimentally quenched melt inclusions in magnesian olivine (Fo77–89) from a basalt sample from the Karymsky volcanic center, which is located in the middle segment of the Eastern Volcanic Front of Kamchatka. The conditions of parental magma formation were estimated using modern methods of trace-element thermometry. Based on direct H2O measurements in inclusions and thermometry of coexisting olivine and spinel, it was shown that the parent melts contained at least 4.5 wt % H2O and crystallized at a temperature of 1114 ± 27°C and an oxygen fugacity of DQFM = 1.5 ± 0.4. The obtained estimates of H2O content and crystallization temperature are among the first and currently most reliable data for the Eastern Volcanic Front of Kamchatka. The primary melt of the Karymsky volcanic center was derived from peridotitic material and could be produced by ~12–17% melting of an enriched MORB source (E-DMM) at ~1230–1250°C and ~1.5 GPa. Our estimates of mantle melting temperature beneath Kamchatka are slightly lower than values reported previously and up to 50°C lower than the dry peridotite solidus, which indicates the influence of a slab-derived hydrous melt. The combined approach to the estimation of the initial H2O content of melt employed in this study can provide a more reliable data in future investigations, and its application will probably to decrease the existing temperature estimates for the mantle wedge above subduction zones.
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Kelsey, David E., and Martin Hand. "On ultrahigh temperature crustal metamorphism: Phase equilibria, trace element thermometry, bulk composition, heat sources, timescales and tectonic settings." Geoscience Frontiers 6, no. 3 (May 2015): 311–56. http://dx.doi.org/10.1016/j.gsf.2014.09.006.

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Reguir, Ekaterina, Anton Chakhmouradian, Barrett Elliott, Ankar Sheng, and Panseok Yang. "Zircon Macrocrysts from the Drybones Bay Kimberlite Pipe (Northwest Territories, Canada): A High-Resolution Trace Element and Geochronological Study." Minerals 8, no. 11 (October 25, 2018): 481. http://dx.doi.org/10.3390/min8110481.

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Zircon macrocrysts in (sub)volcanic silica-undersaturated rocks are an important source of information about mantle processes and their relative timing with respect to magmatism. The present work describes variations in trace element (Sc, Ti, Y, Nb, lanthanides, Hf, Ta, Pb, Th, and U) and isotopic (U-Pb) composition of zircon from the Drybones Bay kimberlite, Northwest Territories, Canada. These data were acquired at a spatial resolution of ≤100 µm and correlated to the internal characteristics of macrocrysts (imaged using cathodoluminescence, CL). Six types of zircon were distinguished on the basis of its luminescence characteristics, with the majority of grains exhibiting more than one type of CL response. The oscillatory-zoned core and growth sectors of Drybones Bay zircon show consistent variations in rare-earth elements (REE), Hf, Th, and U. Their chondrite-normalized REE patterns are typical of macrocrystic zircon and exhibit extreme enrichment in heavy lanthanides and a positive Ce anomaly. Their Ti content decreases slightly from the core into growth sectors, but the Ti-in-zircon thermometry gives overlapping average crystallization temperatures (820 ± 26 °C to 781 ± 19 °C, respectively). There is no trace element or CL evidence for Pb loss or other forms of chemical re-equilibration. All distinct zircon types are concordant and give a U-Pb age of 445.6 ± 0.8 Ma. We interpret the examined macrocrysts as products of interaction between a shallow (<100 km) mantle source and transient kimberlitic melt.
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Ngoniri, Alexis Hamdja, Habib Dadjo Djomo, Timoleon Ngnotue, Patrick Ayonta Kenne, Ghislain Ngassam Mbianya, Sylvestre Ganno, and Jean Paul Nzenti. "Zircon Trace Element Geochemistry and Ti-in-Zircon Thermometry of the Ngazi-Tina Pan-African Post-Collisional Granitoids, Adamawa Cameroon." International Journal of Geosciences 12, no. 04 (2021): 307–28. http://dx.doi.org/10.4236/ijg.2021.124017.

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Dissertations / Theses on the topic "Trace element thermometry"

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Gaehl, A. "An improved understanding of Zr-in-rutile thermometry in application to ultrahigh temperature metamorphic rocks." Thesis, 2016. http://hdl.handle.net/2440/120938.

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Zirconium in rutile (ZIR) concentrations were analysed in samples from two localities in ultrahigh temperature (UHT: >900°C) metamorphic terranes: Anakapalle, Eastern Ghats Province, India (~1030 °C), and Ayatollah Island, Napier Complex, Antarctica (~1050 °C). ZIR temperatures from analyses of these rocks were categorised according to their microstructural setting—inclusion versus grain boundary—and distance from xenocrystic zircon. ZIR temperatures from three of four samples were all or mostly well below UHT conditions—up to 400 °C in some cases. However, upon reintegrating exsolved zirconium back into rutile grains the distribution of ZIR temperatures in all samples becomes bimodal, more typical of the global UHT ZIR thermometry dataset. There is no obvious trend in the ZIR concentration or temperature data relating to the proximity of rutile to xenocrystic zircon, or to the microstructural setting of rutile, suggesting that rutile and zircon (and quartz) communicate over sufficiently long length scales during the prograde and retrograde history. Stunted Si diffusion does not appear to have been a dominant factor in determining ZIR concentrations and temperatures (contrast with Taylor-Jones & Powell, 2015), as there are no known examples of rutile grains preserving peak (i.e. >1000 °C) temperatures that have not exsolved zircon. The major consequence is that ZIR thermometry may almost never preserve the peak UHT conditions in regional terranes where cooling is prolonged. The bimodal ZIR concentration and temperature distribution may relate to a subtle, undetected microstructural control on access to Si and Zr reservoirs combined with different timing of growth of different rutile grains.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2016
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Triebold, Silke. "The geochemistry of detrital rutile - Implications for sedimentary provenance studies and the reconstruction of metamorphic conditions." Doctoral thesis, 2011. http://hdl.handle.net/11858/00-1735-0000-0006-B2FE-F.

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Book chapters on the topic "Trace element thermometry"

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Evans, Hugh L. "Cognitive Complications of Mercury Exposure." In Cognitive and Behavioral Abnormalities of Pediatric Diseases. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780195342680.003.0072.

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Mercury (Hg) is a nonessential metal that has been used in a variety of industrial procedures and pharmaceutical preparations over centuries, resulting in hot spots of environmental contamination and unwanted toxicity in people who were occupationally exposed or were treated with mercury compounds (Clarkson and Magos 2006; Evans 1998). Mercury exists in three different chemical forms, each having a different profile of toxicity. The central nervous system (CNS) is considered to be the target organ for organic mercury and elemental mercury. The kidneys are considered to be the target organ of inorganic mercury. The most widespread current exposure of children is to organic mercury from ingestion of seafood, most of which is in the form of methylmercury, the most severely neurotoxic form of mercury (Clarkson and Magos 2006). Maternal consumption of seafood, although nutritionally beneficial, has been associated with elevated mercury levels in maternal blood and hair, and with deleterious outcomes in their infants. Mothers can transit mercury to their fetus through their blood supply or to their infant through maternal milk. Children also are exposed to mercury in regions where gold is mined (Bose-O’Reilly et al. 2008). Other sources of exposures have been reviewed by Clarkson and Magos (2006). Over the past two decades in the United States, mercury has been increasingly restricted by the U.S. Environmental Protection Agency, and it has been removed from consumer products (where it had been used as a fungicide). Current efforts are under way to encourage consumers to trade their mercury thermometers for newer models that do not use mercury. Mercury has no essential nutritional role, so any amount of mercury in the body can be considered undesirable. For practical purposes, since mercury is present at some level almost everywhere on Earth, the key question is at what dose or concentration in the body can mercury-induced toxicity be documented? Continuing improvements in chemical measurement has resulted in the determining of mercury in lower concentrations. This has been matched by advances in neurological measurements and statistical analyses, resulting in the extrapolation of lower “safe” levels of mercury levels in drinking water, hair, and blood.
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Conference papers on the topic "Trace element thermometry"

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Hartley, Elena Sohn, Ines Pereira, Hugo Moreira, F. Zeb Page, and Craig Storey. "PETROLOGY AND TRACE ELEMENT THERMOMETRY OF GARNET-QUARTZITE FROM THE CATALINA SCHIST." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-282181.

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Castro, Adrian E., Oliver M. Wolfe, and Frank S. Spear. "CHALLENGING THE EQUILIBRIUM PARADIGM: QUARTZ-IN-GARNET RAMAN INCLUSION BAROMETRY AND TRACE ELEMENT THERMOMETRY REVEAL OVERSTEPPED GARNET NUCLEATION ACROSS TECTONIC REGIMES." In Joint 53rd Annual South-Central/53rd North-Central/71st Rocky Mtn GSA Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019sc-325727.

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Castro, Adrian E., and Frank S. Spear. "LAWSONITE REVISITED: INSIGHTS FROM INTEGRATED QUIG RAMAN BAROMETRY, TRACE ELEMENT THERMOMETRY, AND OS THERMODYNAMIC MODELLING OF GARNET INCLUSIONS IN LAWSONITE PSEUDOMORPHS FROM SYROS, GREECE." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-301427.

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Ayonta Kenne, Patrick, Sylvestre Ganno, Timoleon Ngnotue, and Jean Paul Nzenti. "Zircon trace element geochemistry and Ti-in-zircon thermometry of the Linté Pan-African post-collisional granitoids, Central Cameroon: Constraints on the genesis of host magma and tectonic implications." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.3252.

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Cruz-Uribe, Alicia M., Maureen Feineman, Thomas Zack, and Dorrit E. Jacob. "ASSESSING TRACE ELEMENT (DIS)EQUILIBRIUM AND THE APPLICATION OF SINGLE ELEMENT THERMOMETERS IN METAMORPHIC ROCKS." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-287145.

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Silin, Nicola´s, Dari´o F. Delmastro, and Luis E. Juanico´. "Fuel Element Mixing Promoter Evaluation Using a Thermal Tracing Technique." In 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49126.

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A new thermal tracing technique for the direct measurement of enthalpy mixing between coupled subchannels was used for the performance measurement of different mixing promoters used in nuclear fuel elements (FEs). This new technique allows direct enthalpy mixing measurements through the use of small thermal traces generated by means of a sophisticated superficial heater developed together with a high precision thermometry system. The results show the feasibility of this technique to the direct measurement of interchannel mixing parameter required for numerical codes that are usually employed to study the thermo-hydraulic behavior of new fuel elements designs. In the present work the technique is applied to the quantitative study of the performance of mixing vanes for a compact bundle of rods in completely turbulent flow using water as fluid at ambient conditions. Due to its simplicity this method seems feasible to be a useful fuel element design tool. The experimental results shown asymmetric behaviors not previously reported.
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