Results 181 to 190 of about 1,165,786 (215)

A Group of Papers on Porphyry Cu Deposits: Introduction

Economic Geology, 2010
The five papers that follow this brief introduction focus on giant porphyry Cu systems. Porphyry Cu deposits are some of the larger and better understood ore deposits on earth. Studies on porphyry Cu deposits published in Economic Geology in the past two years indicate that interest in these deposits continues on a wide range of topics, including ...
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Clay Mineralogy and Zonation in the Campana Mahuida Porphyry Cu Deposit, Neuquen, Argentina: Implications for Porphyry Cu Exploration

Economic Geology, 2007
Analysis of clay mineralogy and illite crystallinity in the clay-size fraction (
M. Franchini, A. Impiccini, L. Meinert, G. Grathoff, I. B.A. Schalamuk   +4 more
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The La Fortuna Cu-Au porphyry deposit, Chile

2005
La Fortuna is a newly-discovered porphyry deposit that occurs at the southern end of the Eocene-Oligocene metallogenic province in northern Chile. This paper describes the geological features of the deposit, and comments on the implications for mineral exploration.
Piotr Paleczek, Waldo Cuadra, Michael Donnelly, Robert Page   +3 more
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The Porphyry Cu-(Mo-Au) Deposit at Altar (Argentina)

2014
The Altar porphyry Cu-(Mo-Au) deposit occurs in the Miocene to early Pliocene copper belt of the high Andes of western Argentina, close to the Chilean border. A cluster of late Miocene porphyries intruded a more extensive complex of early Miocene rhyolitic to andesitic volcanic and subvolcanic rocks.
Zwahlen, Carmen, Cioldi, Stefania, Wagner, Thomas, Rey, Roger, Heinrich, Christoph A.   +4 more
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Exploration potential of Cu isotope fractionation in porphyry copper deposits

Journal of Geochemical Exploration, 2009
Abstract We examined the copper isotope ratio of primary high temperature Cu-sulfides, secondary low temperature Cu-sulfides (and Cu-oxides) as well as Fe-oxides in the leach cap, which represent the weathered remains of a spectrum of Cu mineralization, from nine porphyry copper deposits.
Ryan Mathur, Spencer Titley, Fernando Barra, Susan Brantley, Marc Wilson, Allison Phillips, Francisco Munizaga, Victor Maksaev, Jeff Vervoort, Garret Hart   +9 more
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The Dinkidi Cu-Au porphyry : geology of the Didipio region and paragenesis of the Dinkidi Cu-Au porphyry deposit

2002
The Dinkidi Cu-Au porphyry deposit is located in northern Luzon, Philippines. The 110 Mt deposit is characterised by high gold grades (ave. 1.2 g/t Au and 0.5% Cu) and is one of only a few alkaline porphyry deposits to have been discovered outside British Columbia. Alkaline magmatism in northern Luzon is related to the Late Oligocene rifting event that
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Formation mechanism of dwarfish Cu-Au porphyry deposits of Macedonia

Doklady Earth Sciences, 2010
Regularities in the distribution and formation mechanism of giant Cu porphyry deposits have been discussed by many authors. Most recent works are dedicated to the problem of their formation [1]. The deposits of Macedonia discussed in this communica tion usually contain up to 150 000 t of copper with the Buchim deposits likely being the smallest ...
A. V. Volkov, T. Serafimovski, V. Stefanova, A. A. Sidorov   +3 more
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Geology of the Ox Lake Cu - Mo porphyry deposit

2010
The Ox Lake copper-molybdenum deposit is locallized in the margin and contact zone of a Late Cretaceous granodiorite porphyry. Hazelton Group rocks, including a lower Felsic Tuff, a middle Andesitic Tuff and an upper Sandstone-SiItstone, are country rocks in the area.
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Copper inclusions in sheet silicates from porphyry Cu deposits

Nature, 1988
Economic geologists have studied the Cu contents of biotite for at least a quarter of a century as potential guides for exploration and as clues to the genesis of porphyry copper deposits1–12. These earlier studies used bulk analytical techniques, and a common, although cautious, assumption was that Cu substituted for Fe in the octahedral sites of the ...
Eugene S. Ilton, David R. Veblen
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Zircon Hf‐O Isotopes of the Gangdese Porphyry Cu Deposits: Implication for Generation of Porphyry Cu Deposits in Collisional Orogenic Setting

Acta Geologica Sinica - English Edition, 2014
Qiuyun LI, Zengqian HOU, Zhiming YANG, Yuanchuan ZHENG, Feng YU, Rui WANG   +5 more
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