نتایج جستجو برای: orogenic gold mineralization

تعداد نتایج: 97355  

2007
R. J. Goldfarb

Orogenic gold de pos its are char ac ter ized by struc tur ally con trolled, low-sul phide quartz veins that formed prox i mal to deep-crustal faults in greenschist-fa cies meta mor phic ter ranes. These de pos its, pre vi ously re ferred to as mesothermal, greenstone-hosted, shear-hosted and turbidite-hosted de pos its, have a wide range of as so ci ated min er al iza tion styles and as so ci ...

Hidarian Shahri, mohammadreza, Kazempour, mohammadreza, Malekzadeh Shafaroudi, Azadeh,

Freezi Lead- Zinc- Copper prospect area is located in north east Mashhad in Khorassan Razavi Province. Mineralization was formed in the area as vein type in the host rocks of slate with interlayer of phyllite and meta sandstone of Upper Triassic to Early Jurassic age (equivalent to Shemshak Formation). The only alteration in the host rock is silicification. Primary minerals are quartz, galena, ...

Journal: :Geological Society, London, Special Publications 2021

Abstract The western Tianshan Gold Belt hosts numerous giant and large gold deposits that have been formed during the late Paleozoic amalgamation of orogen. However, little is known about their exhumation histories Mesozoic to Cenozoic intracontinental evolution Carboniferous Katebasu orogenic deposit in northwestern China a new discovery within Belt, it shares many similarities with other belt...

Journal: :Geological Society of America Bulletin 2022

Abstract The eastern Dunnage Zone of the central Newfoundland Appalachians hosts Paleozoic orogenic gold mineralization along a northeast-trending, crustal-scale fault corridor that extends for more than 200 km. This system is characterized by polyphase, structurally controlled, quartz vein systems cut Neoproterozoic granitoid rocks and unconformably overlying syntectonic, polymict conglomerate...

Journal: :Journal of Geochemical Exploration 2021

The Tethyan Himalaya is the fourth metallogenic belt discovered to date within Tibetan Plateau and contains chromite, gold Sb–polymetallic mineralization. records a series of complex tectonic–magmatic events that include break-up, subduction, collision, detachment, obduction Eastern Gondwana continent, all which generated ideal conditions for ore formation. However, this area remains under-expl...

Journal: :Minerals 2021

Gold deposits in the Jiaodong Peninsula represent a primary gold resource China and mostly exhibit similar ore-forming features related to sericite-quartz-pyrite alteration other controls from (micro-)structural deformation. This study investigates pyrite textures trace elements Sizhuang deposit (>100 t Au) document key factors impacting on genesis of Jiaodong-type orogenic deposits. Three m...

Journal: :Indonesian Journal on Geoscience 2021

DOI: 10.17014/ijog.8.1.73-99 Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and electron microprobe analysis (EMPA) techniques were used to determine the mineralogy chemistry of dominant sulphide associated gold deposits at Fairview Gold Mine Barberton Greenstone Belt (BGB). The rocks ore mineral associations indicate mesothermal (orogenic) conditions for deposit. whole...

Journal: :Minerals 2022

The Dayingezhuang orogenic gold deposit, located in the northwestern Jiaodong Peninsula, is hosted by Zhaoping detachment fault, but paleostress regime during mineralization period remains poorly understood. In this study, a series of numerical modeling experiments with variable stress conditions were carried out using FLAC3D software to determine orientation and fluid migration processes ore-f...

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