Results 181 to 190 of about 9,544 (227)

Porphyry type deposits associated with adakite magmas: Case study of porphyry Cu-Au and Cu-Mo deposits in mongolia

Ifost, 2013
Major porphyry type deposits are spatially and temporally associated with adakitic magmas. Such magmas show high Sr/Y, high Al2O3, and high La/Yb geochemical signature. Case study of late Devonian Oyu Tolgoi and Carboniferous Shuteen deposits show that porphyry Cu-Au are associated with oxidized, high Sr/Y mafic-inermediate adakitic magma.
O. Gerel, B. Batkhishig, B. Munkhtsengel, A. Chimedtseren   +3 more
openaire   +1 more source

Porphyry-Cu Deposits of Turkey

2019
Turkey, located within the western Tethyan-Eurasian Belt contains numerous porphyry copper deposits formed by the subduction, collision and post-collisional events during the closure of NeoTethys Ocean between the latest Cretaceous and late Miocene. These porphyry systems and associated epithermal and skarn deposits are associated with the subduction ...
İlkay Kuşcu, Richard M. Tosdal, Gonca Gençalioğlu-Kuşcu   +2 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

The Origin of Cu/Au Ratios in Porphyry-Type Ore Deposits

Science, 2002
Microanalysis of major and trace elements in sulfide and silicate melt inclusions by laser-ablation inductively coupled plasma mass spectrometry indicates a direct link between a magmatic sulfide liquid and the composition of porphyry-type ore deposits.
Werner E, Halter, Thomas, Pettke, Christoph A, Heinrich   +2 more
openaire   +2 more sources

Role of Potassic Alteration for Porphyry Cu Mineralization: Implication for the Absence of Porphyry Cu Deposits in Japan

Resource Geology, 2018
AbstractThe role of potassic alteration and associated quartz veins for porphyry Cu mineralization in two representative porphyry systems (El Salvador, Chile, and Grasberg, Indonesia) was examined to evaluate the potential of porphyry Cu mineralization in Japan.
Yasushi Watanabe, Ryuya Sato, Adi Sulaksono   +2 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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 ...
openaire   +1 more source

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
openaire   +1 more source