Results 21 to 30 of about 1,484 (210)

Pyrite zonation and source of gold in the Pangjiahe orogenic gold deposit, West Qinling Orogen, central China

open access: yesOre Geology Reviews, 2021
Abstract The Pangjiahe deposit is an orogenic gold deposit located on the northwestern margin of the Fengtai Basin and has proven reserves of 38 t Au at an average grade of 6.3 g/t. Phyllite is widely distributed in the mining area with Triassic granite porphyry and diabase dykes intruded in faults crosscutting it.
Jian Ma   +8 more
openaire   +1 more source

Geological structure and gold prospectivity of the Shamansky ore cluster of the Altai-Sayan folded region (Republic of Khakassia)

open access: yesРуды и металлы, 2022
In this work, we consider the geological settings, mineralogical composition and age of rocks and ores, as well as regularities in the formation of gold mineralization of the Shamansky ore cluster, which is one of the most prospective ore clusters in ...
Alexander I. Chernykh   +3 more
doaj   +1 more source

Geology, Mineralization and Geochemistry of Au in the Godar Sorkh area, Muteh region, Sanandaj-Sirjan zone

open access: yesJournal of Economic Geology, 2021
Introduction Gold deposits formed during mountain-building processes in Phanerozoic terranes that formed in metamorphic environment have a great dispensation in the world (Goldfarb et al., 2001).
Monire Sakhdari   +4 more
doaj   +1 more source

Controls on the Distribution of Invisible and Visible Gold in the Orogenic Gold Deposits of the Yangshan Gold Belt, West Qinling Orogen, China [PDF]

open access: yesMinerals, 2019
Six orogenic gold deposits constitute the Yangshan gold belt in the West Qinling Orogen. Gold is mostly invisible in solid solution or in the sulfide lattice, with minor visible gold associated with stibnite and in quartz-calcite veins. Detailed textural and trace-element analysis of sulfides in terms of a newly-erected paragenetic sequence for these ...
Nan Li, Jun Deng, David Groves, Ri Han
openaire   +1 more source

Hydrous Carbonatitic Liquids Drive CO2 Recycling From Subducted Marls and Limestones

open access: yesGeophysical Monograph Series, Page 209-221., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Erwin Schettino, Stefano Poli
wiley  

+1 more source

The Quartz Veins, Hydrothermal Alteration and Ore Mineralization of Orogenic Gold Deposit at Mendoke Mountains, Southeast Sulawesi, Indonesia

open access: yesIraqi Geological Journal, 2022
The research at Mendoke Mountains, Southeast Sulawesi Province, particularly for the study of gold deposits, becomes a new challenge because there is no previous detailed study.
Hasria, Arifudin Idrus, Wayan Warmada
doaj   +1 more source

On the source of orogenic gold [PDF]

open access: yesGeology, 2013
Gold has historically been a key strategic commodity, and the study of gold deposit formation has long been investigated. Debate on the genesis of so-called “orogenic gold deposits” (>75% of gold recovered through history; [Phillips, 2013][1]), continues largely because it is difficult ...
openaire   +1 more source

Fluid and metal sources in the Fäboliden hypozonal orogenic gold deposit, Sweden [PDF]

open access: yes, 2021
To model the formation of orogenic gold deposits, in a global perspective, it is important to understand the ore-forming conditions not only for deposits hosted in greenschist facies rocks but also in amphibolite facies.
Weihed, Pär,   +7 more
core   +1 more source

Trace elements in pyrite from orogenic gold deposits: Implications for metallogenic mechanism

open access: yes, 2023
Pyrite, one of the most important sulfides, is widely spread in various types of gold deposits, and its trace element geochemistry is extensively useful for revealing the physicochemical conditions of ore-forming fluid, and thus constraining the ore ...
GenShen CAO   +5 more
core   +1 more source

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