Search Results - "Richards, Jeremy P."

Giant ore deposits formed by optimal alignments and combinations of geological processes by Richards, Jeremy P.

“…Giant ore deposits are priority targets for mining companies. A review of the characteristics of several giant porphyry and epithermal deposits worldwide…”
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High Sr/Y magmas reflect arc maturity, high magmatic water content, and porphyry Cu±Mo±Au potential; examples from the Tethyan arcs of central and eastern Iran and western Pakistan by Richards, Jeremy P, Spell, Terry, Rameh, Esmaeil, Razique, Abdul, Fletcher, Tim

“…The temporal and geochemical evolution of arc magmatism that culminated in porphyry Cu±Mo±Au deposit formation has been studied in three separate Neo-Tethyan…”
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Oxidized sulfur-rich arc magmas formed porphyry Cu deposits by 1.88 Ga by Meng, Xuyang, Kleinsasser, Jackie M., Richards, Jeremy P., Tapster, Simon R., Jugo, Pedro J., Simon, Adam C., Kontak, Daniel J., Robb, Laurence, Bybee, Grant M., Marsh, Jeffrey H., Stern, Richard A.

“…Most known porphyry Cu deposits formed in the Phanerozoic and are exclusively associated with moderately oxidized, sulfur-rich, hydrous arc-related magmas…”
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The oxidation state, and sulfur and Cu contents of arc magmas: implications for metallogeny by Richards, Jeremy P.

“…Global data for measured Fe2O3/FeO ratios and Cu contents in unaltered volcanic and intrusive arc rocks indicate that, on average, they are slightly more…”
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Extent of underthrusting of the Indian plate beneath Tibet controlled the distribution of Miocene porphyry Cu–Mo ± Au deposits by Wang, Rui, Richards, Jeremy P., Hou, Zengqian, Yang, Zhiming

“…Miocene igneous rocks in the 1,600 km-long E–W Gangdese belt of southern Tibet form two groups separated at longitude ∼89° E. The eastern group is…”
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Petrology and geochemistry of calc-alkaline volcanic and subvolcanic rocks, Dalli porphyry copper-gold deposit, Markazi Province, Iran by Ayati, Farimah, Yavuz, Fuat, Asadi, Hooshang H., Richards, Jeremy P., Jourdan, Fred

“…Early Miocene igneous rocks associated with the Dalli porphyry ore body are exposed within the Urumieh-Dokhtar Magmatic Arc (UDMA). The Dalli porphyry Cu-Au…”
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A shake-up in the porphyry world? by Richards, Jeremy P

“…Porphyry Cu deposits form in the shallow crustal parts of arc magmatic systems, which root in the mantle wedge, evolve in lower crustal MASH (melting,…”
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Porphyry copper deposit formation in arcs; what are the odds? by Richards, Jeremy P

“…Arc magmas globally are H2O-Cl-S-rich and moderately oxidized (ΔFMQ = +1 to +2) relative to most other mantle-derived magmas (ΔFMQ≤0). Their relatively high…”
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High Sr/Y arc magmas and porphyry Cu±Mo±Au deposits; just add water by Richards, Jeremy P

“…Porphyry Cu±Mo±Au deposits are commonly associated with intermediate composition arc-related igneous rocks with high Sr/Y (and La/Yb) ratios, and such rocks…”
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The Late Miocene–Quaternary Antofalla volcanic complex, southern Puna, NW Argentina: Protracted history, diverse petrology, and economic potential by Richards, Jeremy P., Ullrich, Thomas, Kerrich, Robert

“…The Antofalla volcanic complex (AVC) is located on the southern Puna plateau of NW Argentina, ∼100 km east of the main axis of the Cordillera Occidental…”
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Origin of postcollisional magmas and formation of porphyry Cu deposits in southern Tibet by Wang, Rui, Weinberg, Roberto F., Collins, William J., Richards, Jeremy P., Zhu, Di-cheng

“…The recent discovery of large porphyry copper deposits (PCDs) associated with Miocene (22–12 Ma) granitoid magmas in the eastern section of the…”
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Platinum-Group Element Geochemistry of the Escondida Igneous Suites, Northern Chile: Implications for Ore Formation by Hao, Hongda, Campbell, Ian H, Richards, Jeremy P, Nakamura, Eizo, Sakaguchi, Chie

“…Abstract Platinum-group element (PGE) geochemistry may be used to constrain the timing of sulfide saturation in magmas, which influences the Cu and Au…”
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Hydrothermal evolution of the Copler porphyry-epithermal Au deposit, Erzincan Province, central eastern Turkey by Imer, Ali, Richards, Jeremy P, Muehlenbachs, Karlis

“…The Copler Au deposit (measured and indicated resource of 122.8 million tonnes at 1.7 g/t Au, 4.8 g/t Ag, and 0.1 wt % Cu) is centered around shallow-level…”
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Geochronology, geochemistry, and zircon Hf isotopic compositions of Mesozoic intermediate–felsic intrusions in central Tibet: Petrogenetic and tectonic implications by Li, Jin-Xiang, Qin, Ke-Zhang, Li, Guang-Ming, Richards, Jeremy P., Zhao, Jun-Xing, Cao, Ming-Jian

“…Mesozoic intermediate–felsic intrusions are widely distributed in the southern Qiangtang terrane, central Tibet. Zircon U–Pb dating shows that these intrusions…”
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Tectono-magmatic precursors for porphyry Cu-(Mo-Au) deposit formation by Richards, Jeremy P

“…Porphyry Cu-(Mo-Au) deposits are relatively rare but reproducible products of subduction-related magmatism. No unique processes appear to be required for their…”
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The role of Indian and Tibetan lithosphere in spatial distribution of Cenozoic magmatism and porphyry Cu–Mo deposits in the Gangdese belt, southern Tibet by Wang, Rui, Richards, Jeremy P., Zhou, Li-min, Hou, Zeng-qian, Stern, Richard A., Creaser, Robert A., Zhu, Jing-jing

“…The 1600km-long Gangdese magmatic belt features extensive Paleocene–Eocene I-type intrusive rocks and coeval volcanic successions, abundant but more localized…”
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Contrasting tectonic settings and sulfur contents of magmas associated with Cretaceous porphyry Cu±Mo±Au and intrusion-related iron oxide Cu-Au deposits in northern Chile by Richards, Jeremy P, López, Gloria P, Zhu, Jing-Jing, Creaser, Robert A, Locock, Andrew J, Mumin, A. Hamid

“…Porphyry Cu ± Mo ± Au and iron oxide copper-gold (IOCG) deposits share many similarities (e.g., Fe, Cu, and Au contents), but also have important differences…”
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Elevated magmatic sulfur and chlorine contents in ore-forming magmas at the Red Chris porphyry Cu-Au deposit, northern British Columbia, Canada by Zhu Jingjing, Zhu Jingjing, Richards, Jeremy P, Rees, Chris, Creaser, Robert, DuFrane, S. Andrew, Locock, Andrew, Petrus, Joseph A, Lang, Jürgen

“…The Red Chris porphyry Cu-Au deposit is located in the Stikinia island-arc terrane in northwest British Columbia. It is hosted by the Red Stock, which has five…”
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Increasing magmatic oxidation state from Paleocene to Miocene in the eastern Gangdese Belt, Tibet; implication for collision-related porphyry Cu-Mo ± Au mineralization by Wang, Rui, Richards, Jeremy P, Hou Zengqian, Hou Zengqian, Yang Zhiming, Yang Zhiming, Gou Zhengbin, Gou Zhengbin, DuFrane, S. Andrew

“…In the Gangdese belt of southern Tibet, Paleocene-Eocene magmas record the final stage of Neo-Tethyan subduction and are associated with few economic porphyry…”
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Characteristics of late Cenozoic volcanism along the Archibarca lineament from Cerro Llullaillaco to Corrida de Cori, northwest Argentina by Richards, Jeremy P, Villeneuve, Michael

“…The Archibarca lineament is one of several NW–SE-trending transverse lineaments that cut across the Central Andes of Argentina and Chile. Central Andean, Late…”
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