Results 171 to 180 of about 4,358 (226)
Some of the next articles are maybe not open access.
Porphyry and Related Deposits of Northern Eurasia
Geology of Ore Deposits, 2023It is hard to overestimate the economic importance of the ore deposits of the “porphyry family” and related ones, in particular, epithermal, in the modern world. These deposits are represented by industrial concentrations of a wide range of metals, mainly copper, gold, molybdenum, tin, etc.
I. V. Vikentyev, N. S. Bortnikov
openaire +1 more source
Fluid inclusions technique for porphyry deposit exploration: The Rosario porphyry Cu-Mo deposit
2023Porphyry ore deposits are the largest source of copper, molybdenum, gold, and silver in the world. Various exploration techniques have been developed due to their importance as a source of metals. A special focus has been devoted to understanding the processes of hydrothermal fluids as mineralization drivers. Fluid inclusions provide direct information
Sebastian Avalos, Nicolas Avalos
openaire +1 more source
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.
openaire +1 more source
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.
openaire +1 more source
The michiquillay porphyry copper deposit
Mineralium Deposita, 1974Michiquillay 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
Porphyry Copper Deposit Density
Economic Geology, 2005Estimating 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 +3 more
openaire +1 more source
Origin of phenocrysts in mineralized porphyries of porphyry copper deposits
2005The genetic mechanism of phenocrysts in mineralized porphyries of the Yulong porphyry copper deposit, Tibet, China, has been studied in the context of fluid inclusions in quartz and K-feldspar phenocrysts, phenocryst textures and mineral crystal textures.
Wenming Chen, Jifu Sheng
openaire +1 more source
Porphyry tin deposits in Bolivia
Economic Geology, 1975Tin production from the central and southern parts of the Bolivian tin province has been derived largely from lode systems associated with high-level, late Tertiary stocks of intermediate composition. This paper proposes that several of these stocks, including those at the major Llallagua, Potosi, Oruro, and Chorolque mineralized centers, geological ...
R. H. Sillitoe, C. Halls, J. N. Grant
openaire +1 more source
The formation of porphyry copper deposits
Acta Geochimica, 2016Copper 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 +8 more
openaire +1 more source
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.
openaire +1 more source
Preface: Porphyry deposits in the Eurasian continent
Journal of Asian Earth Sciences, 2014Compared to the porphyry deposit systems in North and South America, and the Southwest Pacific Islands, the porphyry deposits in the Eurasian continent are much less known. The porphyry systems in the Eurasian continent are distributed throughout a large span of geological history, from the Mesoproterozoic to the Cenozoic. In the Phanerozoic, there are
Jingwen Mao +3 more
openaire +1 more source