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Showing 1 to 19 of 19 for “"Ore Deposit"”.
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A textural and chemical analysis of the Hanson Lake ore deposit, Saskatchewan
The Hanson Lake ore body was a small (156,000 tons), massive lens with sharp ore-wall rock contacts and a homogeneous mineralogy. The major sulfide minerals were sphalerite and galena. Textures of the sulfide and gangue minerals indicate that the ore body had undergone deformation and …
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Statistical Analysis of the Environmental Geochemistry of an Unmined Uranium Ore Deposit
… 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 …
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The Marcona - Mina Justa District, South-Central Perú: Implications for the Genesis and Definition of the Iron Oxide-Copper (-Gold) Ore Deposit Clan
… largest concentration of iron oxide-copper-gold deposits in the Central Andes. Hydrothermal activity occurred episodically from 177 to 95 Ma and was controlled by NE-striking faults. At Marcona, emplacement of massive magnetite orebodies with subordinate, overprinted magnetite-sulphide …
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The Dispersions of Copper, Lead and Zinc in the Soils and Juniper Trees Associated With a Shallow Lead-Zinc Ore Deposit: a Potential Environmental Problem
… in surficial materials near a shallow lead-zinc ore deposit. Geophysical procedures were used to determine the extent of the ore deposit while geochemical procedures were used to study the metal dispersion in the soils and portions of juniper trees. A rectangular grid was established adjacent to …
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A Comparison of Geochemistry, Carbonate Mineralogy, and Argillic Alteration between the Dome Prospect and the Main Au Resource of the Donlin Creek Project in Southwest Alaska
… relationship between these two dissimilar ore deposit types. The precious-metal mineral assemblage is composed of auriferous arsenopyrite-pyrite ± stibnite, realgar, and native arsenic intimately associated with Fe-dolomite. Crystallization of euhedral arsenopyrite on porous …
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A thermochemical study of the ore deposits of the Milliken mine, New Lead Belt, Missouri
<p>"The ore body at the Milliken mine is a typical Mississippi Valleytype ore deposit. Mineralization is in a dolostone and structures are subtle, but very important ore controls. The major mineralogy is simple, predominately galena, luminescent hydrothermal dolomite, sphalerite and chalcopyrite. …
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Pyrite porphyroblast paragenesis at the Cherokee Mine, Ducktown, Tennessee
… iron-rich, stratabound, massive sulfide ore at the Cherokee Mine, Ducktown, Tennessee. These porphyroblasts contain abundant inclusions of sphalerite, calcite, and micas that are used to determine the paragenesis of the porphyroblasts and the metamorphic history of the ore deposit. The …
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The rates of oxidation of galena and sphalerite in acidic ferric chloride solutions
… similar to that expected in a weathering ore deposit . The specific surface area of the run solids was determined by N₂ BET procedure and the surface textures observed by SEM. The amount of Fe³⁺ converted to Fe²⁺ by the oxidation reaction was determined using an Eh electrode. Solid …
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An investigation into the floatability of platinum group arsenides and tellurides under varying collector and solution chemistries
… platinum group minerals (PGM) in the Platreef ore deposit. It has been found that there are major losses of these minerals during flotation, with most of the losses attributed to sperrylite (PtAs2). This study has investigated the use of collectors with greater electron-donating properties such …
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Sediment-hosted Zn-Pb-Ag (+ Cu) deposits in the Mount Isa region: An epigenetic approach to mineralisation
… contains numerous sediment-hosted Zn-Pb-Ag-Cu deposits. Previous research on these deposits has resulted in two contrasting metallogenic models: (1) Zn-Pb-Ag mineralisation was formed during the deposition of the host Urquhart Shale at ca. 1655 Ma and was overprinted by Cu mineralisation at ca. …
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Evidence for rapid epithermal mineralization and coeval bimodal volcanism, Bruner Au-Ag property, NV USA
… relationships at the underexplored Miocene-age Bruner low-sulfidation epithermal Au-Ag deposit are elucidated using field and laboratory studies. Bruner is located in central Nevada within the Great Basin extensional province, near several major volcanic trends (Western …
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Application of platinum-group element (PGE) geochemistry to select geological problems
Porphyry deposits produce nearly 75% of the world's Cu, 95% of its Mo and 35% of its Au. These deposits are related to subduction zones, and their tectonic setting is a critical factor in determining their occurrence. However, not all porphyries give rise to economic mineralisation. Over 90% are …
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Application of platinum-group element (PGE) geochemistry to select geological problems
Porphyry deposits produce nearly 75% of the world's Cu, 95% of its Mo and 35% of its Au. These deposits are related to subduction zones, and their tectonic setting is a critical factor in determining their occurrence. However, not all porphyries give rise to economic mineralisation. Over 90% are …
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Structural geology and geochemistry of sedimentary rock-hosted gold in the eastern Nadaleen Trend, Yukon Territory, Canada
… within the eastern Nadaleen Trend. Major Au deposits within the eastern Nadaleen Trend occur within moderately to steeply S- to SSW-plunging anticlines and not within folds in other orientations or synclines. The orientation of the folds that host Au is oblique to the regional trend and they …
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Recognising cryptic alteration surrounding the Mount Isa Copper Deposits: Implications for controls on fluid flow, and mineral exploration
… system responsible for forming this world-class orebody. This study demonstrates the utility of several different approaches to identify and map cryptic alteration haloes associated with copper mineralisation at Mount Isa. Bulk geochemical techniques, such as carbon and oxygen stable isotope …
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Emerging stable isotope techniques in hydrothermal research: new methods applied to carbonates and hydrous minerals in ore deposits and geothermal fields
… thermometry in geothermal fields and mineral deposits (iii) Application of carbonate and hydrous mineral isotope tools in epithermal precious metal deposits A novel approach to measure δ2H and δ18O in hydrous minerals is presented in Chapters 3-4. Measurement was carried out on …
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The Porgera gold deposit, Papua New Guinea : geology, geochemistry and geochronology
The Porgera gold deposit, located in the highlands of Papua New Guinea (PNG), contains ~410 tonnes Au and ~890 tonnes Ag, distributed between a large lower-grade ore zone (78.6 million tonnes, 3.5 g/tonne Au, 9.9 g/tonne Ag), and a smaller highgrade zone (5.0 million tonnes, 26.5 g/tonne Au, 22.1 …
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The Porgera gold deposit, Papua New Guinea : geology, geochemistry and geochronology
The Porgera gold deposit, located in the highlands of Papua New Guinea (PNG), contains ~410 tonnes Au and ~890 tonnes Ag, distributed between a large lower-grade ore zone (78.6 million tonnes, 3.5 g/tonne Au, 9.9 g/tonne Ag), and a smaller highgrade zone (5.0 million tonnes, 26.5 g/tonne Au, 22.1 …
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Trace Elements and Sulfur Isotope Variations in Endowed and Non-Endowed Porphyry Systems of the Dawson Range Mineral Belt, Yukon Territory
… isotope analyses to distinguish between endowed deposits and non-endowed occurrences. The remote location, poor access, and extensive glacial deposits complicate exploration efforts. The study analyzed fifty-six samples from eight porphyry systems, classifying them into endowed deposits (Casino, …