نتایج جستجو برای: quartz diorite

تعداد نتایج: 12371  

Journal: :Minerals 2022

Magmatic zircon tends to present characteristic trends in trace element compositions response magma petrogenesis and metallogenesis, such that may provide a window into melt evolution not accessible by whole rock chemistry. The Yangla large Cu deposit is located the central part of Jinshajiang Suture Zone, southwest China, constrained between Faults. In this study, elements hafnium isotopic zir...

Abedini, , Alipour, , Faramarzi, , Khaleghi, ,

The mineralization index of Yeylaghe Gharachi, as part of Arasbaran metallogenic belt, is located about 25 km northwest of Ahar, East-Azarbaidjan Province, NW Iran. The host rocks of this index consist of composite intrusive rocks with lithologic compositions of granite, quartz monzonite, granodiorite and diorite of Oligocene and Oligo-Miocene age. The alteration zones in this area are mainly p...

Journal: :Ore Geology Reviews 2021

The Bou Azzer district in the central Anti-Atlas of Morocco is world’s unique mining where Co exploited from serpentinite-hosted hydrothermal Co-Ni-Fe arsenide ores. This paper provides first-ever mineralogical and geochemical characterization a suite Fe-rich orebodies found during recent Ait Ahmane area, district. These are lens-like massive disseminated ores fully hosted serpentinites (hereaf...

Journal: :Economic geology and the bulletin of the Society of Economic Geologists 2022

Abstract The Ni-Cu-platinum group element (PGE) sulfide mineralization in the 1.85 Ga Sudbury impact structure occurs two discrete environments: (1) along or near basal contact, including disseminated to semimassive an inclusion-rich sublayer, fragmental underlying anatectic footwall breccia, and veins disseminations pseudotachylitic (2) inclusion-bearing quartz diorite phase of radial concentr...

Journal: :Ore Geology Reviews 2021

We present a study on the Dongguashan quartz diorite stock which is largest Early Cretaceous intrusion associated with skarn-porphyry polymetallic ore deposit in Tongling Ore Cluster, Middle-Lower Yangtze Metallogenic Belt East China. The show massive texture without obvious foliation, and intrusive contact was locally observed inside of stock. anisotropy magnetic susceptibility (AMS) results t...

Journal: :Minerals 2022

A gamma spectrometric analysis of rock samples collected from the Precambrian Oban Massif, southeastern Nigeria, was performed to determine some primordial radioelements’ activity concentrations: U-238, Th-232, and K-40, their associated radiological hazards. The mean radionuclides determined be 1073.06 ± 0.65, 160.74 1.32, 250.76 0.91 Bq·kg−1 for 40K, 238U, 232Th, respectively, showing that th...

2017
Yang Li David Selby Daniel Condon Simon Tapster

We present high-precision chemical abrasion-isotope dilution-thermal ionization mass spectrometry (CA-IDTIMS) U-Pb zircon and isotope dilution-negative-thermal ionization mass spectrometry (ID-N-TIMS) Re-Os molybdenite geochronology of the world-class Tibetan Qulong porphyry Cu-Mo deposit. The data is used to constrain the timing, duration, and to yield implications for the ore-forming processe...

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