Relevant bibliographies by topics / Ore geochemistry

Academic literature on the topic 'Ore geochemistry'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Ore geochemistry"

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de Boorder, H. "Geochemistry of sedimentary ore deposits." Earth-Science Reviews 22, no. 3 (November 1985): 241–42. http://dx.doi.org/10.1016/0012-8252(85)90063-7.

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Wolf, Karl H. "Geochemistry of sedimentary ore deposits." Chemical Geology 48, no. 1-4 (March 1985): 355–59. http://dx.doi.org/10.1016/0009-2541(85)90058-0.

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Ridge, J. D. "Geochemistry of sedimentary ore deposits." Sedimentary Geology 44, no. 1-2 (May 1985): 176–78. http://dx.doi.org/10.1016/0037-0738(85)90041-7.

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Price, Jonathan G. "SEG Presidential Address: I Never Met a Rhyolite I Didn’t Like – Some of the Geology in Economic Geology." SEG Discovery, no. 57 (April 1, 2004): 1–13. http://dx.doi.org/10.5382/segnews.2004-57.fea.

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ABSTRACT Rhyolites and their deep-seated chemical equivalents, granites, are some of the most interesting rocks. They provide good examples of why it is important to look carefully at fresh rocks in terms of fıeld relationships, mineralogy, petrography, petrology, geochemistry, and alteration processes. Because of their evolved geochemisty, they commonly are important in terms of ore-forming processes. They are almost certainly the source of metal in many beryllium and lithium deposits and the source of heat for many other hydrothermal systems. From other perspectives, rhyolitic volcanic eruptions have the capacity of destroying civilizations, and their geochemistry (e.g., high contents of radioactive elements) is relevant to public policy decision-making.
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Landais, P. "Organic geochemistry of sedimentary uranium ore deposits." Ore Geology Reviews 11, no. 1-3 (June 1996): 33–51. http://dx.doi.org/10.1016/0169-1368(95)00014-3.

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Zamana, L., and L. Taskina. "GEOCHEMISTRY OF DRAINAGE WATER OF GOLD-ORE DEPOSITS OF DARASUN ORE FIELD." Postgraduate. Supplement to “Transbaikal State University Journal” 12, no. 2 (2018): 41–47. http://dx.doi.org/10.21209/2074-9155-2018-12-2-41-47.

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Pavlenko, Yu. "Predictive geochemistry of ore gold in Eastern Transbaikalia." Transbaikal State University Journal 26, no. 10 (2020): 6–14. http://dx.doi.org/10.21209/2227-9245-2020-26-10-6-14.

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The subject of the research is the methods of forecasting the Eastern Transbaikalia - a large mining region of Russia, in which the main internal and external criteria for ore content are established by modern geological mapping at a scale of 1:1,000,000. The article considers endogenous geochemical criteria for gold concentration in the Earth’s crust of the region, which constitute a mandatory methodological method for predicting gold ore objects at any scale. The aim of the work is to clarify the achieved level of knowledge about the mineralogical and geochemical criteria for gold concentration in the course of the evolution of the Earth’s crust up to the formation of industrial deposits and the isolation of ore formations. The methodology of the study is to systematize a huge amount of factual material concerning the processes of natural concentration of gold, to analyze its representativeness, to assess the completeness and reliability of published and stock information used to clarify the mineralogical and geochemical criteria for predicting ore gold. Using the chemical properties of gold, the forms of finding gold, amount of it in the forming geological complexes and natural environments, their evolution, distribution in structural and tectonic zones, some causes of concentration and mineralogical and geochemical prediction criteria are considered. Special attention is paid to the need to study and account for nanoscale (dispersed) gold. As the main ore-formation units of gold mineralization, standardized ore formations are defined with a division into gold ore proper, complex gold-bearing and gold-bearing and geological and industrial types of deposits. There are 15 geological and industrial types, of which 13 are transbaikal deposits standards and two are attracted from other regions. These types of deposits differ in the number of objects related to them. Due to some similarity in the composition of ore matter, geological and industrial types differ in the most important classification characteristics for the forecast. Areas of distribution of direct and indirect mineralogical and geochemical features grouped into mineralogical and geochemical forecast criteria are promising for endogenous concentration of gold mineralization
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Peng, Zhenan, Makoto Watanabe, Kenichi Hoshino, and Yasuhiro Shibata. "Ore mineralogy of tin-polymetallic (Sn-Sb-FePb-Zn-Cu-Ag) ores in the Dachang tin field, Guangxi, China and their implications for the ore genesis." Neues Jahrbuch für Mineralogie - Abhandlungen 175, no. 2 (December 1, 1999): 125–51. http://dx.doi.org/10.1127/njma/175/1999/125.

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Tornos, Fernando, and Daniel Arias. "Sulphur and lead isotope geochemistry of the Rubiales Zn-Pb ore deposit (NW Spain)." European Journal of Mineralogy 5, no. 4 (July 22, 1993): 763–74. http://dx.doi.org/10.1127/ejm/5/4/0763.

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Smith, M. "Geochemistry of Skarn and Ore Formation in Dolomites." Mineralogical Magazine 63, no. 4 (1999): 613–14. http://dx.doi.org/10.1180/minmag.1999.063.4.07.

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Dissertations / Theses on the topic "Ore geochemistry"

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Lundkvist, Anders. "The process water geochemistry of the Kiirunavaara magnetite ore." Licentiate thesis, Luleå tekniska universitet, 1998. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26157.

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Unger, Derick Lee Saunders James A. Hames W. "Geochronology and geochemistry of Mid-Miocene Bonanza low-sulfidation epithermal ores of the northern Great Basin, USA." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Geology_and_Geography/Thesis/Unger_Derick_6.pdf.

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Tanner, Dominique. "In situ mineral geochemistry as a guide to ore-forming processes." Phd thesis, Canberra, ACT : The Australian National University, 2014. http://hdl.handle.net/1885/125140.

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Isotopic and trace element analyses are essential to our understanding ore-forming processes, but traditionally these techniques have required bulk digestion of rocks and minerals. Recent advances in in situ microanalytical techniques permit us to analyse samples on a mineral-by mineral basis and probe the chemistry of individual growth bands in minerals, providing a near-continuous record in any zoned mineral. This thesis is composed of five studies using the in situ geochemistry of 'gangue' (non-ore) minerals to elucidate cryptic ore-forming processes that are obscured using conventional analyses. The first half of this thesis presents coupled isotopic and trace element analyses in quartz and pyrite from magmatic-hydrothermal Cu-Au deposits. These studies revealed complex chemical zonation, providing a detailed record of cryptic fluid chemistry and depositional processes. A distinct isotopic signature and residual metastable silica hydrates in quartz microcrystals from the El Indio deposit, Chile provided the first evidence for silica maturation in a high-temperature environment and the first evidence for non-equilibrium isotope fractionation in quartz. The second half of this thesis focuses on the trace element chemistry of minerals from the Bellevue Core, a ~3 km drillcore intersecting the upper half of the Bushveld Complex, South Africa - the largest known repository of platinum-group elements (PGEs). These studies revealed a prospective PGE horizon and provide the first evidence for extensive equilibration of plagioclase in cumulate rocks.
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Sharman, Elizabeth. "Application of multiple sulfur isotope analysis to Archean ore-forming processes." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104747.

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Identification of sulfur sources in an ore-forming system is important as it provides a greater understanding of how a mineral deposit forms and how best to explore for that particular type of deposit. It can also aid in the understanding of the ocean and atmosphere chemistry at the time of formation. Mass independent sulfur isotope fractionation in the Archean atmosphere provides a fingerprint for identifying non-magmatic sources of sulfur. This makes sulfur multiple isotope measurements a powerful tool for deconvolving ore-forming processes in the Archean. This thesis presents three applications of multiple sulfur isotope analysis for investigation of ore forming processes in the Archean. The first study evaluates proposed models for formation of volcanogenic massive sulfide (VMS) deposits during the Neo- and Mesoarchean, which demand little to no contribution of seawater sulfate to the ore-forming system. This is in contrast to Phanerozoic VMS systems where evidence for a seawater sulfate component is clear. We re-evaluate these models in the context of the ~2.7 Ga Noranda Camp of the Abitibi subprovince, Québec, using a combination of multiple sulfur isotope and trace element data. Sulfide samples analysed for this study have Δ33S values between -0.59 and -0.03 ‰. We interpret these negative values to reflect a sulfur component that originated in the seawater sulfate reservoir. Incorporation of this component appears to have increased during the collapse and subsequent evolution of the Noranda caldera. Higher concentrations of Se in samples with Δ33S values close to 0 ‰, and higher Fe/(Fe + Zn) values in sphalerite, are indicative of higher temperatures of formation.The second study is an investigation of sulfur sources that contributed to the formation of Cu- and Au-rich VMS deposits of the ~2.7 Ga Doyon-Bouquet-LaRonde (DBL) mining camp, also within the Abitibi subprovince. This subgroup of deposits has previously been interpreted as having a significant magmatic-hydrothermal source of ore fluids and metals. Multiple sulfur isotope analysis of deposits within the DBL mining camp, with the exception of one minor lens, indicates a very clear igneous-magmatic affinity (Δ33SV-CDT = 0.14 to +0.04 ‰), with little to no contribution from any surficial source of sulfur. In contrast, sulfide that formed at or very near the paleo-seafloor exhibits a distinct component of sulfur from the seawater sulfate reservoir (Δ33SV-CDT = 1.43 to 0.34 ‰). This study highlights the isotopic difference between the Noranda VMS deposits and those of the DBL. In addition, a lack of variation in Δ33S values between ore lenses which exhibit aluminous alteration and those that do not calls into question the characteristics with which to identify those VMS deposits that required dominant contribution of magmatic fluids.The final study examines sulfur sources within the Platreef, the main PGE bearing horizon of the Northern Limb of the Bushveld Igneous Complex (BIC), South Africa. The Platreef has a high percentage of sulfides relative to the analogous Merensky Reef in the eastern and western limbs of the BIC. It is in direct contact with underlying Neoarchean to Paleoproterozoic sediments, which are potential local sources of sulfur. However, Δ33S analysis of the Platreef sulfides identifies heterogeneous crustal sulfur contribution to the system both prior to and post-emplacement throughout the length of the Platreef.This thesis clearly demonstrates that multiple sulfur isotope analysis is a powerful tool for the identification of sulfur sources in ore forming processes of the Archean, and those involving Archean rocks, and can be applied to a range of problems and deposit types. It also highlights important issues for future consideration, including the role of seawater sulfate in the formation of Archean VMS deposits, and the characteristics of the parent magma of the BIC.
L'identification des sources de soufre dans la minéralisation est importante car elle permet de comprendre les processus et de définir la meilleure méthode d'exploration. Elle peut aussi aider à la compréhension de la chimie des océans et de l'atmosphère lors de sa formation. Le fractionnement indépendant de la masse des isotopes du soufre dans l'atmosphère de l'Archéen fournit une emprunte unique permettant d'identifier les sources de soufre non magmatiques. La nature chimique conservatrice des signatures du Δ33S en fait un outil puissant pour la déconvolution des processus minéralisateurs Archéen.Cette thèse présente trois applications de l'analyse multiple des isotopes du soufre dans l'investigation des processus de minéralisation à l'Archéen. La première étude teste les modèles de formation des sulfures massifs volcanogènes (SMV) Néo- et Mésoarchéen récemment proposés ne requérant peu ou pas d'apport de sulfate marin par rapport aux systèmes SMV du Phanérozoïque et contemporains où le sulfate marin joue un rôle important. Ces modèles sont réévalués en utilisant le camp de Noranda (~2.7 Ga), sous-province de l'Abitibi, et en combinant l'utilisation de données provenant de l'analyse des isotopes du soufre et des éléments traces.Les sulfures analysés pour cette étude ont des valeurs de δ34SV-CDT entre -14.90 et +2.49 ‰, et des valeurs de Δ33SV-CDT entre -0.59 et -0.03 ‰. Selon notre interprétation, les valeurs négatives de Δ33S sont dues à l'incorporation de soufre provenant de l'eau de mer. La proportion de soufre marin aurait augmenté durant l'affaissement et l'évolution subséquente de la caldera de Noranda. Des concentrations plus élevées de Se combinées à des valeurs près de 0 ‰ et d'un haut ratio Fe/(Fe + Zn) dans les sphalérites indiquent une température de formation élevée.La deuxième étude est une investigation des sources de soufre ayant contribuées à la formation des SMV riches en Cu et en Au du camp minier Doyon-Bousquet-LaRonde (DBL; ~2.7 Ga), aussi dans la sous-province de l'Abitibi. Une source magmatique-hydrothermale de fluides minéralisateurs importante était l'interprétation donnée pour ce sous-groupe. À l'exception d'une lentille mineure, l'analyse isotopique multiple des dépôts du camp minier DBL indiquent clairement une affinité ignée-magmatique (Δ33SV-CDT = 0.14 to +0.04 ‰), avec peu ou pas de contribution de soufre provenant de la surface. Par contre, les sulfures formés sur le plancher océanique ou près de celui-ci exhibe une contribution distinctive des sulfates marins (Δ33SV-CDT = 1.43 to 0.34 ‰). D'un autre côté, l'absence de variation des valeurs du Δ33S entre des lentilles minéralisées avec une altération alumineuse et celles ne démontrant pas cette altération remet en question les l'identification des dépôts de type SMV ayant une contribution importante ou dominante de fluides magmatiques. La dernière étude examine les sources de soufre du Platreef – horizon riche en éléments du groupe platine (EGP) du flanc nord du Complexe Igné Bushveld (CIB) en Afrique du Sud. Le Platreef contient un haut pourcentage de sulfures par rapport au dépôt analogue Merensky Reef des flancs est et ouest du CIB. Il est en contact direct avec les sédiments Néoarchéens à Paléoprotérozoïques qui sont une source potentielle de soufre locale. D'un autre côté, les analyses du Δ33S des sulfures du Platreef permettent d'identifier une contribution de soufre hétérogène provenant de la croûte terrestre, avant et après la mise en place du gisement.Cette étude démontre clairement que l'analyse multiple des isotopes du soufre est un outil puissant dans l'identification des sources de soufre des processus minéralisateurs de l'Archéen, ainsi que ceux impliquant des roches archéennes, et cette approche peut être appliquée à un éventail de problèmes et types de dépôt. Aussi, elle soulève des questions importantes sur le rôle du sulfate marin dans la formation des dépôts SMV de l'Archéen et les caractéristiques du magma du CIB.
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Archibald, Sandy M. "The role of vapour in the transport and deposition of metals in ore-forming systems /." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82821.

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The solubility of gold and copper chloride in liquid-undersaturated, HCl-bearing water vapour was investigated experimentally at elevated temperatures and pressures. Experimental results show that the solubility of gold and copper is significant, increasing at higher fHCl and fH2O for gold, and at higher fH2O for copper. These increases are attributed to the formation of hydrated gas species, with a metal:chlorine ratio of 1. Hydration numbers vary from 5 at 300°C to 3 at 360°C for gold, and from 7.6 at 280°C, to 6.0 at 300°C, and 6.1 at 320°C for copper; the results reflect the presence of trimer [Cu3Cl3•(H2O)n] or tetramer [Cu4Cl4•(H2O)n] species. Results indicate that solubility for both vapour species is retrograde, i.e., it decreases with increasing temperature, and formed via the reactions: Ausolid+m·HClgas+n·H2 Ogas=AuClm·H2 Ogasn+m 2·Hgas2 3CuClsolid+n·H2Ogas= Cu3Cl3·H2O gasn
Calculations based on the solubility data indicate an economic high-sulphidation Au deposit (e.g., Nansatsu, Japan; 36 tonnes) could form in ~30,000 years, whereas a porphyry copper deposit (e.g., 50 million tonnes at 0.5% Cu) could form in as little as ~20,500 years, assuming transport only in the vapour phase.
Precious- and base-metal-rich composite scales, containing up to 111 ppm Au and 628 ppm Ag, occur in surface pipes at the Momotombo geothermal field, Nicaragua. Polysulphide scale fragments, comprising chalcopyrite, sphalerite, galena, electrum and hessite grains in a matrix of amorphous silica, formed as a result of cooling and ligand loss induced by boiling, during fluid ascent in well MT-36. Secondary bornite, stromeyerite and chalcocite/digenite replaced chalcopyrite through the addition of Cu and Ag and an increase in fO2 . A drop in pH due to well closure resulted in replacement of primary and secondary sulphides by tetrahedrite.
Reaction-path modelling using the program CHILLER simulates deposition of minerals from the reconstructed deep geothermal fluid, at temperature intervals (depths) along excess enthalpy and isoenthalpic boiling paths. These simulations accurately reproduce the paragenetic sequence of base- and precious-metal mineralization in the scales. The modelling indicates excess enthalpy boiling results in metal precipitation at greater depths than would be expected for isoenthalpic boiling, and that at Momotombo this occurs through the destabilisation of bisulphide complexes in response to loss of CO2 and H2 S during phase separation.
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Jiang, Shao-Yong. "Chemical and boron isotopic compositions of tourmaline from sedex-type and metaevaporite ore deposits." Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294950.

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Way, Bryan C. "Geology and Geochemistry of Sedimentary Ferromanganese Ore Deposits, Woodstock, New Brunswick, Canada." Thesis, Fredericton: University of New Brunswick, 2012. http://hdl.handle.net/1882/44600.

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The Early-Silurian Woodstock Fe-Mn Deposits are a series of six, northeasttrending, low grade manganiferous-iron deposits in western New Brunswick that collectively represent the largest Mn resource in North America (194,000,000 tonnes; 13% Fe and 9% Mn). Recent expansion of Route 95 has allowed a more detailed local stratigraphy, mineralogy, and geochemistry of the Fe-Mn deposits within the context of the regional stratigraphy to ascertain the genesis of these deposits. Geological mapping during the field seasons of 2008 and 2009 has revealed six Lithofacies Associations (O, I, II, III, IV, V) within the area, that, generally, are lying conformably on top of each other. However complications due to folding and interbedding have resulting in juxtaposition of the lithofacies associations so they are not always in stratigraphic order. These lithofacies associations are composed of a turbidite-rich section of blue grey calcareous sandstone (O) overlain by black pyritic mudstone (I), associated mineralized and nonmineralized green (II) and red siltstone (III), and laminated to massive grey green calcareous sandstone (IV and V). Na/Mg ratios, chondrite-normalized REE patterns, and mineralogical evidence of rapid changes in ocean redox conditions suggest the Fe-Mn mineralized lithofacies were formed in the offshore zone of a continental shelf on a stable cratonic margin. Al-Fe-Mn ternary and SiO2/Al2O3 binary plots developed from archived drill core data indicate the Fe-Mn mineralization was initially derived from hydrogenous-detrital sources without any indication of a hydrothermal input as a source of Fe and Mn.
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Levitan, Denise Madeline. "Statistical Analysis of the Environmental Geochemistry of an Unmined Uranium Ore Deposit." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/64782.

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An evaluation of the geochemistry of the environment prior to large-scale changes enables scientists and other stakeholders to assess both baseline conditions and the potential impact of those changes to the environment. One area in which documentation of pre-development geochemistry is particularly important is in the exploitation of ore deposits. Ore deposits consist of concentrations of elements or minerals that are enriched enough to be of potential economic value. Their unusual geochemistry often leaves a signature on the environment that can both aid in location an economic resource and present environmental management challenges during its lifecycle. Coles Hill, Virginia, represents one such site. The Coles Hill property is the location of uranium-enriched rock, commonly referred to as the Coles Hill uranium deposit. This dissertation outlines study design, sampling, and statistical analysis methods that can be used in the geochemical characterization of a potential resource extraction site. It presents three studies on geoenvironmental media at Coles Hill. The first study discusses sampling strategies and statistical analysis to address variability in geology, hydrology and climate for baseline assessment and presents an example of such an assessment at Coles Hill. Results suggest a localized environmental impact of the deposit but that differences in bedrock geology within the area surrounding the deposit could also be responsible for some of the variation. This study also emphasizes the importance of consideration of data below analytical detection limits and describes methods for doing so. The second study compares the geochemistry of soil samples collected at Coles Hill with reference data collected by the U.S. Geological Survey using multivariate statistical techniques. Differences are used to suggest potential pathfinder elements such as light rare earth elements to aid in exploration for similar deposits. The third study uses multivariate statistical analysis to examine differences among rocks, soils, and stream sediments to infer important geochemical processes involved in weathering of the deposit. Overall, the results of these studies can aid in the development of future environmental site studies at Coles Hill and elsewhere.
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Meadows, Holly Rachael. "Mineral Geochemistry, Deformation and Ore Fluid Evolution in the Capricorn Orogen, WA." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/69391.

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The Capricorn Orogen, Western Australia, has a complex history spanning over a billion years. Regional deformation, metamorphism and magmatism has induced migration of ore fluids into local ore deposits. Mineral geochemistry records the chemical environment of ore precipitation and is employed to determine the source of fluids and age of mineral growth. Integration of mineral geochemistry into complex geological systems is used to identify overprinting fluid and deformation events, and evaluate the formation of ore.
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Rempel, Kirsten U. "The solubility and speciation of molybdenum in water vapour at elevated temperatures and pressures : implications for ore genesis." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82411.

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The solubility of molybdenum trioxide in liquid-undersaturated water vapour has been investigated experimentally at 300, 320, and 360°C and 48 to 163 bars. Results of these experiments show that the solubility of MoO3 in the vapour phase is between 1 and 23 ppm, which is 19-20 orders of magnitude higher than that in a water-free system. Molybdenum solubilities increase linearly with fH2O , indicating that the metal forms a gaseous hydrated complex of the type MoO3·nH2O by the reaction: MoO3g+nH 2Og=MoO3· nH2Og A1 The hydration number, n, is interpreted to have a value of 2.6 at 300ºC, 2.5 at 320ºC, and 3.0 at 360ºC. Values of log K for this reaction are 16.9 at 300ºC, 16.5 at 320ºC, and 12.5 at 360ºC.
Calculations based on the extrapolated solubility of MoO 3 in equilibrium with molybdenite at 600ºC and 500 bars, using average H2O and total S fluxes of actively degassing volcanoes, with fO2 and fS2 controlled by the assemblage hematite-magnetite-pyrite, indicate that the vapour phase can transport sufficient Mo in about 900,000 years (within the life of some geothermal systems) to form a deposit of 336 Mt, with an average grade of 0.087% Mo (e.g., the Endako Mo-porphyry deposit, Canada).
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Books on the topic "Ore geochemistry"

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Stanton, R. L. Ore elements in arc lavas. Oxford: Clarendon Press, 1994.

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Nash, J. Thomas. Geochemical signatures of ore deposits and mineralized rocks in the Cedar Mountains, Mineral and Nye Counties, Nevada. [Reston, Va.?]: U.S. Dept. of the Interior, Geological Survey, 1985.

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Folger, Peter F. Geochemical survey of the Baird Mountains 1p0sX3p0s quadrangle, Northwest Alaska. [Reston, Va.?]: U.S. Dept. of the Interior, U.S. Geological Survey, 1992.

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Tu Guangchi xue shu wen ji. Beijing: Ke xue chu ban she, 2010.

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Nash, J. Thomas. Geochemical signatures of ores and altered rocks in the Gilbert District, Esmeralda County, Nevada. [Reston, Va.?]: U.S. Dept. of the Interior, Geological Survey, 1985.

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Nash, J. Thomas. Geochemical signatures of ores and altered rocks in the Gilbert District, Esmeralda County, Nevada. [Reston, Va.?]: U.S. Dept. of the Interior, Geological Survey, 1985.

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United States Geological Survey. Geochemical studies in Alaska by the U.S. Geological Survey, 1989. Denver, CO: U.S. Geological Survey, 1991.

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Frisken, James G. Interpretation of reconnaissance geochemical data from the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska peninsula, Alaska. Denver, CO: Dept. of the Interior, U.S. Geological Survey, 1992.

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Nash, J. Thomas. Geochemical signatures of ores and altered rocks in the Gilbert District, Esmeralda County, Nevada. [Reston, Va.?]: U.S. Dept. of the Interior, Geological Survey, 1985.

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Sheridan, Douglas M. Chemical data concerning Proterozoic ores and rocks from the Sedalia mine area, Chaffee County, Colorado. Denver, Colo: U.S. Dept. of the Interior, Geological Survey, 1988.

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Book chapters on the topic "Ore geochemistry"

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Barbieri, Mario. "Geochemistry of Barium." In Nonmetalliferous Stratabound Ore Fields, 9–15. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-6554-9_2.

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Dahlkamp, Franz J. "Geochemistry and Minerochemistry of Uranium." In Uranium Ore Deposits, 17–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02892-6_3.

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Uliana, Daniel, M. Manuela M. Lé Tassinari, Henrique Kahn, and Marco Antonio Angora. "Process Mineralogy of Lateritic Nickel Ore." In Springer Geochemistry/Mineralogy, 71–80. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13948-7_8.

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Azarnova, Liudmila. "Bolshetagninskoe Deposit Microcline–Pyrochlore Ore Process Mineralogy." In Springer Geochemistry/Mineralogy, 223–32. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13948-7_23.

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Lecumberri-Sanchez, Pilar, and Robert J. Bodnar. "Halogen Geochemistry of Ore Deposits: Contributions Towards Understanding Sources and Processes." In Springer Geochemistry, 261–305. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-61667-4_5.

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Wells, M. A., and E. R. Ramanaidou. "Raman Spectroscopic Core Scanning for Iron Ore and BIF Characterization." In Springer Geochemistry/Mineralogy, 387–96. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13948-7_39.

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Hong, Qiuyang, Lili Zhang, and Bo Li. "The Occurrence of Sc, Co, and Ni in Lithiophorite-type Manganese Ore." In Springer Geochemistry/Mineralogy, 151–58. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13948-7_16.

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Jones, D. G., and J. A. Plant. "Geochemistry of Shales." In Metallogenic models and exploration criteria for buried carbonate-hosted ore deposits—a multidisciplinary study in eastern England, 65–94. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4899-7184-5_6.

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Çiftçi, Emin, Abdurrahman Lermi, and Bülent Yalçınalp. "Ore Mineral Textures of Late Cretaceous Volcanogenic Massive Sulfide Deposits of Turkey: Proposed Paragenetic Sequence." In Springer Geochemistry/Mineralogy, 91–97. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13948-7_10.

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Ohmoto, Hiroshi. "Chapter 14. STABLE ISOTOPE GEOCHEMISTRY of ORE DEPOSITS." In Stable Isotopes in High Temperature Geological Processes, edited by John W. Valley, Hugh P. Taylor, and James R. O’Neil, 491–560. Berlin, Boston: De Gruyter, 1986. http://dx.doi.org/10.1515/9781501508936-019.

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Conference papers on the topic "Ore geochemistry"

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Maibam, B., S. F. Foley, and D. E. Jacob. "Geochemistry of Chromian Spinels from the Indo-Myanmar Ophiolite Belt of Northeastern India." In Proceedings of the Workshop on Magmatic Ore Deposits. Geological Society of India, 2015. http://dx.doi.org/10.17491/cgsi/2014/63395.

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Manikyamba, C., and Abhishek Saha. "PGE Geochemistry of Komatiites from Neoarchean Sigegudda Greenstone Terrane, Western Dharwar Craton, India." In Proceedings of the Workshop on Magmatic Ore Deposits. Geological Society of India, 2015. http://dx.doi.org/10.17491/cgsi/2014/63398.

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Mirza, Azimuddin. "GEOCHEMISTRY OF IRON ORE DEPOSITS FROM THE SINGHBHUM-ORISSA CRATON (INDIA)." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b13/s3.042.

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Satyanarayanan, M., S. P. Singh, D. S. Sarma, and V. Balaram. "Geochemistry of PGE-Bearing Ultramafic Rocks from Ikauna in Madawara Complex, Bundelkhand Craton, Central India." In Proceedings of the Workshop on Magmatic Ore Deposits. Geological Society of India, 2015. http://dx.doi.org/10.17491/cgsi/2014/63397.

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Zamana, L. V., L. V. Taskina, and L. V. Zamana. "Geochemistry of Drainage Water of Darasun Ore Field Gold Deposits (Eastern Transbaikalia, Russia)." In Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" dedicated to the 85th anniversary of H.I. Ibragimov (ISEES 2019). Paris, France: Atlantis Press, 2019. http://dx.doi.org/10.2991/isees-19.2019.130.

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Fontaine, Joseph Edward, Samuel Fontaine, and G. Nelson Eby. "GEOCHEMISTRY OF ORE MINERALS AND CALCITE FROM THE FRANKLIN AND STERLING HILL ZINC MINES." In 53rd Annual GSA Northeastern Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018ne-310671.

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Sunder Raju, P. V., R. K. W. Merkle, R. H. Sawkar, and K. T. Vidyadharan. "Geology and Geochemistry of Ultramafic-Mafic Rocks from Antarghatta Belt, Western Dharwar Craton, Karnataka: Implications for PGE Mineralization and Future Targets." In Proceedings of the Workshop on Magmatic Ore Deposits. Geological Society of India, 2015. http://dx.doi.org/10.17491/cgsi/2014/63399.

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Subramanyam, K. S. V., V. Balaram, U. V. B. Reddy, Parijat Roy, and S. S. Sawant. "Trace, REE and PGE Geochemistry of the Mesoproterozoic Boggulakonda Gabbroic Rocks in the High-Grade Terrain Adjoining Nellore Schist Belt, South East India." In Proceedings of the Workshop on Magmatic Ore Deposits. Geological Society of India, 2015. http://dx.doi.org/10.17491/cgsi/2014/63400.

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Utevsky, Elinor S., John H. Dilles, Nansen H. Olson, and Adam J. R. Kent. "GEOCHEMISTRY OF CENOZOIC PLUTONIC ROCKS IN THE WESTERN CASCADES: TRACERS OF ARC EVOLUTION & ORE GENESIS." In 115th Annual GSA Cordilleran Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019cd-329847.

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Palma Lira, Gisella, Fernando Barra, Martin Reich, Adam Simon, and Rurik Romero Núñez. "Magmatic-hydrothermal ore-forming processes revealed by magnetite geochemistry of Chilean iron oxide-apatite (IOA) deposits." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.7122.

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Reports on the topic "Ore geochemistry"

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Jonasson, I. R., E M Hillary, M. D. Hannington, P. Mercier-Langevin, and D. Diekrup. Trace-element geochemistry of ore-mineral separates from selected Canadian base-metal deposits. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2020. http://dx.doi.org/10.4095/326134.

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Jonasson, I. R., D. E. Ames, and A. G. Galley. Sulphide ore geochemistry database for volcanogenic massive sulphide deposits of the Paleoproterozoic Flin Flon Belt and Sherridon area, Manitoba and Saskatchewan. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2009. http://dx.doi.org/10.4095/248125.

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Lawley, C., B. Dubé, S. Jackson, Z. Yang, P. Mercier-Langevin, and D. Vaillancourt. Sulfide paragenesis and LA-ICP-MS arsenopyrite geochemistry at the Meliadine Gold District, Nunavut: implications for Re-Os arsenopyrite geochronology and ore deposit genesis. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2014. http://dx.doi.org/10.4095/293938.

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Jamieson, H. E., and J. W. Lydon. Geochemistry of a fossil ore-solution aquifer: chemical exchange between rock and hydrothermal fluid recorded in the lower portion of research drill hole CY-2a, Agrokipia, Cyprus. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/122592.

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Kidder, J. A., M. B. McClenaghan, M I Leybourne, M. W. McCurdy, P. Pelchat, D. Layton-Matthews, C. E. Beckett-Brown, and A. Voinot. Geochemical data for stream and groundwaters around the Casino Cu-Au-Mo porphyry deposit, Yukon (NTS 115 J/10 and 115 J/15). Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328862.

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This open file reports geochemical data for stream and groundwater samples collected around the Casino porphyry Cu-Au-Mo deposit, one of the largest and highest-grade deposits of its kind in Canada. The calc-alkaline porphyry is hosted in a Late Cretaceous quartz monzonite and associated breccias in the unglaciated region of west central Yukon. Water chemistry around the deposit was investigated because: (i) the deposit has not yet been disturbed by mining; (ii) the deposit was known to have metal-rich waters in local streams; and (iii) the deposit has atypically preserved ore zones. Stream water samples were collected at 22 sites and groundwater samples were collected from eight sites. Surface and groundwaters around the Casino deposit are anomalous with respect to Cd (up to 5.4 µg/L), Co (up to 64 µg/L), Cu (up to 1657 µg/L), Mo (up to 25 µg/L), As (up to 17 µg/L), Re (up to 0.7 µg/L), and Zn (up to 354 µg/L) concentrations. The stable isotopes of O and H of the groundwaters are essentially identical to the surface waters and plot close to the local and global meteoric water lines, indicating that the waters represent modern recharge, consistent with the generally low salinities of all the waters (total dissolved solids range from 98 to 1320 mg/L). Sulfur and Sr isotopes are consistent with proximal waters interacting with the Casino rocks and mineralization; a sulfide-rich bedrock sample from the deposit has delta-34S = -1.2 permille and proximal groundwaters are only slightly heavier (-0.3 to 3.1 permille). These geochemical and isotopic results indicate that surface water geochemistry is a suitable medium for mineral exploration for porphyry-style mineralization in the Yukon, and similar unglaciated regions in Canada. The atypical geochemical signature (Mo, Se, Re, As, Cu) of these types of deposits are typically reflected in the water chemistry and S isotopes provide a more local vectoring tool.
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Lane, L. S., K. M. Bell, and D. R. Issler. Overview of the age, evolution, and petroleum potential of the Eagle Plain Basin, Yukon. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/326092.

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New mapping, biostratigraphy, geochemistry, and organic petrology results have led to new insights into the structural evolution, depositional history, and resource potential of the Eagle Plain Basin. Apatite fission-track modelling resolves at least two distinct heating-cooling cycles and suggests that sediment was sourced from the east, as well as from the south. A recently identified marine-slope setting in the west of the basin represents a new petroleum play. Advances in understanding the age and depositional history of the Eagle Plain Group derive from new fossil localities, a new bentonite age, and detrital zircon data. Initiated in the Cenomanian, or possibly latest Albian, deposition continued until the late Maastrichtian, although post-Coniacian deposits may have been subsequently eroded, or bypassed across southern parts of the basin. New petroleum resource appraisals include new petroleum exploration-play concepts, as well as qualitative assessments of unconventional oil and gas potential.
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Jacques, I. J., A. J. Anderson, and S. G. Nielsen. The geochemistry of thallium and its isotopes in rare-element pegmatites. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328983.

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The Tl isotopic and trace element composition of K-feldspar, mica, pollucite and pyrite from 13 niobium-yttrium-fluorine (NYF)-type and 14 lithium-cesium-tantalum (LCT)-type rare-element pegmatites was investigated. In general, the epsilon-205Tl values for K-feldspar in NYF- and LCT-type pegmatites increases with increasing magmatic fractionation. Both NYF and LCT pegmatites display a wide range in epsilon-205Tl (-4.25 to 9.41), which complicates attempts to characterize source reservoirs. We suggest 205Tl-enrichment during pegmatite crystallization occurs as Tl partitions between the residual melt and a coexisting aqueous fluid or flux-rich silicate liquid. Preferential association of 205Tl with Cl in the immiscible aqueous fluid may influence the isotopic character of the growing pegmatite minerals. Subsolidus alteration of K-feldspar by aqueous fluids, as indicated by the redistribution of Cs in K-feldspar, resulted in epsilon-205Tl values below the crustal average (-2.0 epsilon-205Tl). Such low epsilon-205Tl values in K-feldspar is attributed to preferential removal and transport of 205Tl by Cl-bearing fluids during dissolution and reprecipitation. The combination of thallium isotope and trace element data may be used to examine late-stage processes related to rare-element mineralization in some pegmatites. High epsilon-205Tl and Ga in late-stage muscovite appears to be a favorable indicator of rare-element enrichment LCT pegmatites and may be a useful exploration vector.
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Lacerda Silva, P., G. R. Chalmers, A. M. M. Bustin, and R. M. Bustin. Gas geochemistry and the origins of H2S in the Montney Formation. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329794.

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The geology of the Montney Formation and the geochemistry of its produced fluids, including nonhydrocarbon gases such as hydrogen sulfide were investigated for both Alberta and BC play areas. Key parameters for understanding a complex petroleum system like the Montney play include changes in thickness, depth of burial, mass balance calculations, timing and magnitudes of paleotemperature exposure, as well as kerogen concentration and types to determine the distribution of hydrocarbon composition, H2S concentrations and CO2 concentrations. Results show that there is first-, second- and third- order variations in the maturation patterns that impact the hydrocarbon composition. Isomer ratio calculations for butane and propane, in combination with excess methane estimation from produced fluids, are powerful tools to highlight effects of migration in the hydrocarbon distribution. The present-day distribution of hydrocarbons is a result of fluid mixing between hydrocarbons generated in-situ with shorter-chained hydrocarbons (i.e., methane) migrated from deeper, more mature areas proximal to the deformation front, along structural elements like the Fort St. John Graben, as well as through areas of lithology with higher permeability. The BC Montney play appears to have hydrocarbon composition that reflects a larger contribution from in-situ generation, while the Montney play in Alberta has a higher proportion of its hydrocarbon volumes from migrated hydrocarbons. Hydrogen sulphide is observed to be laterally discontinuous and found in discrete zones or pockets. The locations of higher concentrations of hydrogen sulphide do not align with the sulphate-rich facies of the Charlie Lake Formation but can be seen to underlie areas of higher sulphate ion concentrations in the formation water. There is some alignment between CO2 and H2S, particularly south of Dawson Creek; however, the cross-plot of CO2 and H2S illustrates some deviation away from any correlation and there must be other processes at play (i.e., decomposition of kerogen or carbonate dissolution). The sources of sulphur in the produced H2S were investigated through isotopic analyses coupled with scanning electron microscopy, energy dispersive spectroscopy, and mineralogy by X-ray diffraction. The Montney Formation in BC can contain small discrete amounts of sulphur in the form of anhydrite as shown by XRD and SEM-EDX results. Sulphur isotopic analyses indicate that the most likely source of sulphur is from Triassic rocks, in particular, the Charlie Lake Formation, due to its close proximity, its high concentration of anhydrite (18-42%), and the evidence that dissolved sulphate ions migrated within the groundwater in fractures and transported anhydrite into the Halfway Formation and into the Montney Formation. The isotopic signature shows the sulphur isotopic ratio of the anhydrite in the Montney Formation is in the same range as the sulphur within the H2S gas and is a lighter ratio than what is found in Devonian anhydrite and H2S gas. This integrated study contributes to a better understanding of the hydrocarbon system for enhancing the efficiency of and optimizing the planning of drilling and production operations. Operators in BC should include mapping of the Charlie Lake evaporites and structural elements, three-dimensional seismic and sulphate ion concentrations in the connate water, when planning wells, in order to reduce the risk of encountering unexpected souring.
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Kuster, K., C. M. Lesher, and M. G. Houlé. Geology and geochemistry of mafic and ultramafic bodies in the Shebandowan mine area, Wawa-Abitibi terrane: implications for Ni-Cu-(PGE) and Cr-(PGE) mineralization, Ontario and Quebec. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329394.

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The Shebandowan Ni-Cu-(PGE) deposit occurs in the Shebandowan greenstone belt in the Wawa-Abitibi terrane. This deposit is one of a few economic Ni-Cu-(PGE) deposits in the Superior Province and one of a very few deposits worldwide that contains both Ni-Cu-(PGE) and Cr-(PGE) mineralization. The mafic-ultramafic successions in the area comprise abundant flows and sills of tholeiitic basalt and lesser Al-undepleted komatiite (MgO >18 wt%, Al2O3/TiO2 = 15-25), the latter indicating separation from mantle sources at shallow levels. Siliceous high-Mg basalts (MgO 8-12 wt%, SiO2 > 53 wt%, TiO2 < 1.2 wt%, La/Sm[MN] < 1-2) are relatively abundant in the area and likely represent crustally contaminated komatiites. Ultramafic bodies in the Shebandowan mine area comprise at least three or four komatiitic sills (A-B, C, D) and at least two komatiitic flows (E, F), all of which are altered to serpentinites or talc-carbonate schists with relict igneous chromite and rare relict igneous orthopyroxene-clinopyroxene. Unit A-B contains pentlandite-pyrrhotite-chalcopyrite-pyrite-magnetite mineralization, occurring as massive sulfides, sulfide breccias, or stringers, and subeconomic chromite mineralization in contorted massive bands varying from a few millimetres up to 10 metres thick. The localization of massive and semi-massive Ni-Cu-(PGE) ores along the margins of Unit A and the paucity of disseminated and net-textured ores suggest tectonic mobilization. Chromite is typically zoned with Cr-Mg-Al-rich (chromite) cores and Fe-rich (ferrichromite/magnetite) rims due to alteration and/or metamorphism, but rarely contains amoeboid magnetite cores. The thickness of chromite in Unit B is too great to have crystallized in cotectic proportion from the komatiitic magma and a model involving dynamic upgrading of magnetite xenoliths derived from interflow oxide facies iron formations is being tested.
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McClenaghan, M. B., W. A. Spirito, S. J. A. Day, M. W. McCurdy, and R. J. McNeil. Overview of GEM surficial geochemistry and indicator mineral surveys and case studies in northern Canada. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330473.

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As part of the Geo-mapping for Energy and Minerals (GEM) program between 2008 and 2020, the Geological Survey of Canada carried out reconnaissance-scale to deposit-scale geochemical and indicator mineral surveys and case studies across northern Canada. In these studies, geochemical methods were used to determine the concentrations of 65 elements in lake sediment, stream sediment, stream water, lake water and till samples across approximately 1,000,000 km2 of northern Canada. State-of the-art indicator methods were used to examine the indicator mineral signatures in regional-scale stream sediment and till surveys. This research identified areas with anomalous concentrations of elements and/or indicator minerals that are indicative of bedrock mineralization, developed new mineral exploration models and protocols, trained a new generation of geoscientists and transferred knowledge to northern communities. The most immediate impact of the GEM surveys has been the stimulation of mineral exploration in Canada's north, focussing exploration efforts into high mineral potential areas identified in GEM regional-scale surveys. Regional- and deposit-scale studies demonstrated how transport data (till geochemistry, indicator minerals) and ice flow indicator data can be used together to identify and understand complex ice flow and glacial transport. Detailed studies at the Izok Lake, Pine Point, Strange Lake, Amaruq deposits and across the Great Bear Magmatic Zone demonstrate new suites of indicator minerals that can now be used in future reconnaissance- and regional-scale stream sediment and till surveys across Canada.
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