Results 181 to 190 of about 58,548 (228)

Chemical composition of tourmaline in orogenic gold deposits [PDF]

open access: yesMineralium Deposita, 2020
Tourmaline from 18 orogenic gold deposits and districts, hosted in varied country rocks and metamorphic facies, was investigated by EPMA (electron probe micro-analyzer) and LA-ICP-MS (laser ablation-inductively coupled plasma-mass spectrometry) to establish discriminant geochemical features to constrain indicator mineral surveys for gold exploration ...
Marjorie Sciuba   +2 more
semanticscholar   +3 more sources

The giant Jiaodong gold province: The key to a unified model for orogenic gold deposits?

open access: yesGeoscience Frontiers, 2016
AbstractAlthough the term orogenic gold deposit has been widely accepted for all gold-only lode-gold deposits, with the exception of Carlin-type deposits and rare intrusion-related gold systems, there has been continuing debate on their genesis. Early syngenetic models and hydrothermal models dominated by meteoric fluids are now clearly unacceptable ...
M Santosh
exaly   +3 more sources
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Multi-stage and multi-sourced fluid and gold in the formation of orogenic gold deposits in the world-class Mana district of Burkina Faso – Revealed by LA-ICP-MS analysis of pyrites and arsenopyrites

Ore Geology Reviews, 2019
Mana is a world-class Paleoproterozoic orogenic gold district (∼8.0 Moz) that includes five gold deposits (Fofina, Nyafe, Siou, Wona-Kona and Yaho) hosted in various rocks in the northern part of the Birimian Hounde greenstone belt, western Burkina Faso.
Jérôme Augustin, Damien Gaboury
exaly   +2 more sources

Orogenic Gold Deposits: Mineralization Mechanism and Research Perspectives

Journal of Earth Science, 2023
Shao-yong Jiang   +3 more
semanticscholar   +2 more sources

Mesozoic orogenic gold deposits in Mexico

open access: yesOre Geology Reviews, 2017
Abstract Although orogenic gold deposits in Mexico were mostly formed during the Cenozoic, they started forming during the Late Cretaceous, or perhaps even earlier. Mylonitic zones in the Oaxacan metamorphic complex span either Permo-Triassic or Triassic-Jurassic ages, but none of these have been formally associated with the existing orogenic gold ...
Aldo Izaguirre   +2 more
exaly   +2 more sources

Metal remobilization from country rocks into the Jiaodong-type orogenic gold systems, Eastern China: New constraints from scheelite and galena isotope results at the Xiadian and Majiayao gold deposits

Ore Geology Reviews, 2021
Orogenic gold deposits in the Jiaodong Peninsula contain more than 5000 t of known gold resources. Precambrian metamorphic rocks and Mesozoic granite represent the main host rocks for these deposits, but gold deposition (∼120 Ma) is significantly younger
Zhankun Liu   +5 more
semanticscholar   +1 more source

Gold Deposits in the Sanandaj–Sirjan Zone: Orogenic Gold Deposits or Intrusion‐Related Gold Systems? [PDF]

open access: yesResource Geology, 2012
AbstractMost of the known large gold deposits in Iran are located along the Sanandaj–Sirjan Zone, western Iran, which hosts a wide range of gold deposit types. Gold deposits in the belt, hosted in upper Paleozoic to upper Mesozoic volcano‐sedimentary sequences of lower greenschist to lower amphibolite metamorphic grade, appear to represent mainly ...
Farhang Aliyari   +2 more
exaly   +3 more sources

Tourmaline, scheelite, and magnetite compositions from orogenic gold deposits and glacial sediments of the Val-d'Or district (Québec, Canada): Applications to mineral exploration

open access: yesJournal of Geochemical Exploration, 2019
Tourmaline, scheelite, and magnetite from orogenic gold deposits (n = 22) and glacial sediments (n = 5) of the Val-d'Or mining district (Québec, Canada) were investigated by Electron Probe Micro-Analyzer (EPMA) and Laser Ablation-Inductively Coupled ...
Georges Beaudoin
exaly   +2 more sources

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