Results 151 to 160 of about 856,506 (210)

Unveiling the metallogenic continuum of an Archean craton. [PDF]

Nat Commun
Demmer M, Ezad I, Fiorentini M.
europepmc   +1 more source

Integrated ore classification using stand-alone and hybridised machine learning algorithms. [PDF]

Sci Rep
Gholami Vijouyeh A, Kadkhodaie A, Siahcheshm K, Asadi A, Hosseinzadeh M.   +4 more
europepmc   +1 more source

Zircon LA-ICP-MS U-Pb Ages and the Hf Isotopic Composition of the Ore-Bearing Porphyry from the Yanghuidongzi Copper Deposit, Heilongjiang, China, and Its Geological Significance

Minerals (Basel, Switzerland), 2019
The Yanghuidongzi copper deposit is a typical porphyry copper deposit located at the eastern margin of the Xing’anling-Mongolian Orogenic Belt (XMOB). While much attention have been paid to the ore-forming age of the deposit and the magma source of
Hongli Pang
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The michiquillay porphyry copper deposit

Mineralium Deposita, 1974
Michiquillay is a mineralized intrusive quartz monzonite porphyry displaying typical porphyry copper alteration zones as found in metallized intrusives of that composition. From the interior outward these are the phyllic, argillic and propylitic zones. The potassic zone is not exposed at the surface.
V.F. Hollister, E.B. Sirvas
openaire   +1 more source

The formation of porphyry copper deposits

Acta Geochimica, 2016
Copper is a moderately incompatible chalcophile element. Its behavior is strongly controlled by sulfides. The speciation of sulfur is controlled by oxygen fugacity. Therefore, porphyry Cu deposits are usually oxidized (with oxygen fugacities > ΔFMQ +2) (Mungall 2002; Sun et al. 2015).
Weidong Sun, Jin-tuan Wang, Li-peng Zhang, Chan-chan Zhang, He Li, Ming-xing Ling, Xing Ding, Cong-ying Li, Hua-ying Liang   +8 more
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How to make porphyry copper deposits

Earth and Planetary Science Letters, 2020
Abstract Much of the world's economic copper resources are hosted in porphyry copper deposits (PCDs), shallow level magmatic intrusions associated mostly with thick ( > 45 km ) magmatic arcs, such as mature island arcs and continental arcs. However, a well-known, but unresolved paradox, is that arc magmas traversing thick crust, particularly ...
Cin-Ty A. Lee, Ming Tang
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Porphyry Copper Deposit Density

Economic Geology, 2005
Estimating numbers of undiscovered mineral deposits has been a source of unease among economic geologists yet is a fundamental task in considering future supplies of resources. Estimates can be based on frequencies of deposits per unit of permissive area in control areas around the world in the same way that grade and tonnage frequencies are models of ...
D. A. Singer, V. I. Berger, W. D. Menzie, B. R. Berger   +3 more
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Porphyry copper deposits

Geological Society, London, Special Publications, 1977
Summary Porphyry copper deposits are large crustal sulphur anomalies containing copper and other metals. Much of the sulphur is oxidized and, along with a major portion of the copper, deposited from fluids evolved from certain calc-alkaline melts of intermediate composition.
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The Sar Cheshmeh porphyry copper deposit

Economic Geology, 1975
The Sar Cheshmeh porphyry copper, located in southern Iran, was mined in ancient times, "rediscovered" about 1966, explored during 1966-1969, and will be in full production in 1977 at a rate of 40,000 tons of ore per day. Mineralization is associated with a late Tertiary granodiorite porphyry stock, cut by a series of genetically related intramineral ...
G. C. Waterman, R. L. Hamilton
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Porphyry–copper deposits of Bulgaria

International Geology Review, 1983
(1983). Porphyry–copper deposits of Bulgaria. International Geology Review: Vol. 25, No. 2, pp. 178-188.
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