1-20 OF 799 RESULTS FOR

gold

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 January 2025
American Mineralogist (2025) 110 (1): 82–92.
...Dennis Sugiono; Laure Martin; Nicolas Thébaud; Denis Fougerouse; Crystal K. LaFlamme; Marco Fiorentini; Laura Petrella; Paul Guagliardo; Steve Reddy; Si-Yu Hu; Alexandra Suvorova Abstract In orogenic systems, pyrite hosts both free-native and lattice-bound gold. The processes governing gold habit...
FIGURES
First thumbnail for: Arsenic in pyrite acts as a catalyst for dissoluti...
Second thumbnail for: Arsenic in pyrite acts as a catalyst for dissoluti...
Third thumbnail for: Arsenic in pyrite acts as a catalyst for dissoluti...
Journal Article
Published: 13 December 2024
Geochemistry: Exploration, Environment, Analysis (2024) 24 (4): geochem2024-029.
...Mohammad Ebdali; Ardeshir Hezarkhani The Janja region is located 30 kilometres NW of Sefidabeh city in Sistan and Baluchistan province, Iran. Considering the evidence of gold mineralization, it is necessary to identify the promising mineral areas in this region. Clustering is an important method...
FIGURES
First thumbnail for: Comparison of clustering methods in determining <s...
Second thumbnail for: Comparison of clustering methods in determining <s...
Third thumbnail for: Comparison of clustering methods in determining <s...
Journal Article
Published: 01 December 2024
American Mineralogist (2024) 109 (12): 2060–2072.
... methodology selections of further detailed petrological exploration. Here, we present a novel application of Swin Transformer, a deep learning algorithm to classify mineral phases such as arsenopyrite, chalcopyrite, gold, pyrite, and stibnite in images captured by optical microscopy. To speed up the training...
FIGURES
First thumbnail for: The application of “transfer learning” in optical ...
Second thumbnail for: The application of “transfer learning” in optical ...
Third thumbnail for: The application of “transfer learning” in optical ...
Journal Article
Published: 01 November 2024
Russ. Geol. Geophys. (2024) 65 (11): 1302–1315.
... experiment silver gold tin sphalerite hydrothermal systems The possibility of Au and Ag incorporation in significant amounts in In-bearing sphalerite at high temperatures (> 700 °C) following the scheme Me + + In 3+ ↔ 2Zn 2+ (Me + = Au + , Ag + , Cu + ) is shown in ( Tonkacheev et al., 2019...
FIGURES
First thumbnail for: Origin of Au-Ag Mineralization in Sphalerite Ores ...
Second thumbnail for: Origin of Au-Ag Mineralization in Sphalerite Ores ...
Third thumbnail for: Origin of Au-Ag Mineralization in Sphalerite Ores ...
Journal Article
Published: 01 August 2024
Russ. Geol. Geophys. (2024) 65 (8): 910–926.
..., which made it possible to construct 2D and 3D models of interphase boundaries. In the first case, thin layers of gold NPs (~30 nm thick), iron (~50 nm thick), and copper (~50 nm thick) were deposited onto quartz crystals less than 40 μm in size by magnetron sputtering, i.e., all metals were...
FIGURES
First thumbnail for: Behavior of <span class="search-highlight">Gold</s...
Second thumbnail for: Behavior of <span class="search-highlight">Gold</s...
Third thumbnail for: Behavior of <span class="search-highlight">Gold</s...
Journal Article
Published: 23 July 2024
Geochemistry: Exploration, Environment, Analysis (2024) 24 (3): geochem2023-068.
...Don I. Cummings; Andy Orr; Francis MacDonald The Regnault gold deposit in Quebec, Canada, was discovered by Kenorland Minerals North America Ltd in 2020 following identification of a gold-in-till dispersal train. In 2022, two non-traditional media – eskers and organic lake-bottom mud (gyttja...
FIGURES
First thumbnail for: <span class="search-highlight">Gold</span> in eske...
Second thumbnail for: <span class="search-highlight">Gold</span> in eske...
Third thumbnail for: <span class="search-highlight">Gold</span> in eske...
Journal Article
Published: 18 June 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (3): 429–455.
.... Most of the mineralization is characterized by the replacement of ankerite by quartz in veins, minor sulfides, and variable amounts of native gold, or consists of sheared mafic rocks intensely replaced with silica, biotite, arsenopyrite, and pyrrhotite ( Blais et al. 2015 ). Hydrothermal alteration...
FIGURES
First thumbnail for: <span class="search-highlight">Gold</span> Mineral...
Second thumbnail for: <span class="search-highlight">Gold</span> Mineral...
Third thumbnail for: <span class="search-highlight">Gold</span> Mineral...
Journal Article
Published: 01 June 2024
South African Journal of Geology (2024) 127 (2): 271–284.
...A. Hofmann Abstract The exceptional gold mineralisation in quartz pebble conglomerates of the Witwatersrand Basin is attributed to a combination of factors. These factors are linked to the co-evolution of the atmosphere, hydrosphere, lithosphere and biosphere, at a very specific time in Archaean...
FIGURES
First thumbnail for: Factors responsible for Witwatersrand <span class=...
Second thumbnail for: Factors responsible for Witwatersrand <span class=...
Third thumbnail for: Factors responsible for Witwatersrand <span class=...
Journal Article
Journal: Elements
Published: 01 June 2024
Elements (2024) 20 (3): 205.
Journal Article
Published: 01 June 2024
American Mineralogist (2024) 109 (6): 1106–1117.
... metamorphism forearc phase equilibria gold Sulfur is a minor component of the Earth’s crust but has a wide range of oxidation states (2– to 6+) and affinity for chalcophile elements, making its behavior of significant interest in metamorphic systems and ore deposits. In marine siliciclastic...
FIGURES
First thumbnail for: Pyrite stability and chalcophile element mobility ...
Second thumbnail for: Pyrite stability and chalcophile element mobility ...
Third thumbnail for: Pyrite stability and chalcophile element mobility ...
Journal Article
Journal: Economic Geology
Published: 01 May 2024
Economic Geology (2024) 119 (3): 525–550.
... deposit, followed by discovery of the Altan Nar and Bayan Khundii epithermal gold deposits along with several prospects and advanced exploration projects. These discoveries form the core of the emerging Khundii (“Valley”) metallogenic province, ~50 × 100 km in size, located within a single island-arc...
FIGURES
First thumbnail for: Epithermal <span class="search-highlight">Gold</sp...
Second thumbnail for: Epithermal <span class="search-highlight">Gold</sp...
Third thumbnail for: Epithermal <span class="search-highlight">Gold</sp...
Journal Article
Published: 01 May 2024
Russ. Geol. Geophys. (2024) 65 (5): 623–637.
...N.V. Astakhova; O.N. Kolesnik; A.S. Astakhov; X. Shi; L. Hu; A.V. Alatortsev Abstract ––We studied the distribution of gold, silver, and platinum group elements (Pd, Pt, Rh, Ir, and Ru) in two bottom sediment cores of the southern Chukchi Sea. It is shown that the Holocene pelite–silty sediments...
FIGURES
First thumbnail for: Precious Metals in the Holocene Sediments of the C...
Second thumbnail for: Precious Metals in the Holocene Sediments of the C...
Third thumbnail for: Precious Metals in the Holocene Sediments of the C...
Journal Article
Published: 30 April 2024
Scottish Journal of Geology (2024) 60 (1): sjg2023-023.
..., the porphyry that crops out is unlikely to have provided the mineralizing fluids associated with the mineralization. A concealed intrusion or granitic dykes within the porphyry may be the source of the magmatic–hydrothermal fluids. The age data indicate that the Tomnadashan mineralization is coeval with gold...
FIGURES
First thumbnail for: A reinterpretation of the mineralization processes...
Second thumbnail for: A reinterpretation of the mineralization processes...
Third thumbnail for: A reinterpretation of the mineralization processes...
Journal Article
Published: 25 April 2024
Mineralogical Magazine (2024) 88 (5): 565–575.
... to 15 μm in size, associated with nickeltyrrellite, tyrrellite, berzelianite, hakite-(Zn), hakite-(Cd), eucairite, clausthalite, and gold in calcite gangue. In reflected light, kvačekite is white with a faint yellowish shade; bireflectance, pleochroism and anisotropy are absent. Internal reflections...
FIGURES
First thumbnail for: Kvačekite, NiSbSe, a new selenide mineral from Buk...
Second thumbnail for: Kvačekite, NiSbSe, a new selenide mineral from Buk...
Third thumbnail for: Kvačekite, NiSbSe, a new selenide mineral from Buk...
Journal Article
Published: 22 April 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (2): 253–306.
...B. Jane Barron; Lawrence M. Barron; Karsten Goemann Abstract A Cu- and Rh-enriched magmatic ore system is defined by abundant PGM (platinum group mineral) inclusions in forty-four Pt-Fe alloy nuggets from the Camumbi River gold placer, northwest Ecuador. Isoferroplatinum is depleted in Rh, Os...
FIGURES
First thumbnail for: Inclusions in Placer Pt-Fe Alloy Nuggets, Northwes...
Second thumbnail for: Inclusions in Placer Pt-Fe Alloy Nuggets, Northwes...
Third thumbnail for: Inclusions in Placer Pt-Fe Alloy Nuggets, Northwes...
Journal Article
Journal: Geosphere
Published: 12 April 2024
Geosphere (2024) 20 (3): 647–677.
... that occurred concurrent with or prior to extensional tectonism, such as the origins of Carlin-type gold deposits or sources of sodic-calcic alteration. As such, determination of the geometry, slip, and timing of normal faults in the Hilltop and Lewis mining districts is essential to reconstructing the pre...
FIGURES
First thumbnail for: Contrasting constraints on the temporal and spatia...
Second thumbnail for: Contrasting constraints on the temporal and spatia...
Third thumbnail for: Contrasting constraints on the temporal and spatia...
Journal Article
Published: 21 March 2024
Mineralogical Magazine (2024) 88 (4): 421–429.
... ., 2015 ). However, there is an important distinction to be made between those minerals that have a large number of discreet and potentially highly valuable occurrences such as gold and those that make up a significant volume of geological material exposed at or near the Earth's surface, such as feldspar...
FIGURES
First thumbnail for: Abundances, distributions and patterns of discover...
Second thumbnail for: Abundances, distributions and patterns of discover...
Third thumbnail for: Abundances, distributions and patterns of discover...
Journal Article
Published: 19 March 2024
Geochemistry: Exploration, Environment, Analysis (2024) 24 (1): geochem2023-061.
... similar C1-chondrite normalized REE distributions, with REE patterns indicating significant enrichment of LREE relative to HREE and similar (La)N/(Sm)N and (Gd)N/(Yb)N ratios. These characteristics are similar to those of the gold ores, copper ores, altered rock and bedrock near the ore bodies...
FIGURES
First thumbnail for: Geogas prospecting for igneous ore deposits covere...
Second thumbnail for: Geogas prospecting for igneous ore deposits covere...
Third thumbnail for: Geogas prospecting for igneous ore deposits covere...
Journal Article
Published: 23 January 2024
Geochemistry: Exploration, Environment, Analysis (2024) 24 (1): geochem2023-043.
...) This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License ( http://creativecommons.org/licenses/by/4.0/ ) clay fraction geochemistry UltraFine+ gold copper lithium Pilbara Yilgarn regolith CSIRO MIRWA M0462 and M0462a As part...
FIGURES
First thumbnail for: Multi-element geochemical analyses on ultrafine so...
Second thumbnail for: Multi-element geochemical analyses on ultrafine so...
Third thumbnail for: Multi-element geochemical analyses on ultrafine so...
Journal Article
Published: 18 January 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (1): 95–105.
...Alexandre R. Cabral; Antônio A.S. Gomes, Jr.; Stephanie Lohmeier; Richard Wirth; Anja Schreiber Abstract One alluvial grain of gold, recovered from a placer deposit in the platiniferous Au-Pd belt of Minas Gerais, at Fazenda Limeira, is distinguished by inclusions, between approximately 2 and 10 µm...
FIGURES
First thumbnail for: <span class="search-highlight">Gold</span>-Bearing...
Second thumbnail for: <span class="search-highlight">Gold</span>-Bearing...
Third thumbnail for: <span class="search-highlight">Gold</span>-Bearing...