The geochemistry and geochronology of Permian granitoids from central Inner Mongolia, NE China: Petrogenesis and tectonic implications

Zhao, Qingqing; Zhai, Degao; Liu, Jiajun; Williams‐Jones, Anthony E.

doi:10.1016/j.lithos.2021.106489

Cited by 4 publications

(1 citation statement)

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“…Widespread Permian intrusive rocks include monzonite, granite porphyry, granodiorite (280 Ma; Zhang et al 2020), biotite adamellite (274-268 Ma;Xiao et al 2012), and minor gabbro (279 Ma;Liu et al 2019). Most of them relate to the I-type series with subordinate A-type intrusions, resulting from the southward subduction of the Paleo-Asian oceanic plate underneath the northern margin of the NCC (e.g., Wu et al 2011;Liu et al 2013Liu et al , 2019Yang et al 2016;Zhao et al 2021b).…”

Section: Regional Geologymentioning

confidence: 99%

Quartz texture and the chemical composition fingerprint of ore-forming fluid evolution at the Bilihe porphyry Au deposit, NE China

Hong,

Zhai,

Keith

2024

American Mineralogist

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Quartz is widely distributed in various magmatic-hydrothermal systems and shows variable textures and trace element contents in response to multiple generations, enabling this mineral phase to serve as a robust tracer for monitoring hydrothermal fluid evolution.This study highlights that integrated high-resolution SEM-CL textures and trace element data of quartz can be used to constrain physicochemical fluid conditions and trace the genesis of quartz in porphyry ore-forming systems. The Bilihe deposit is a Au-only porphyry deposit located in the Central Asian orogenic belt, NE China. Four quartz generations were distinguished following a temporal sequence from early-stage dendritic quartz, unidirectional solidification textured quartz (UST quartz), gray banded vein quartz (BQ), to late-stage white calcite vein quartz (CQ), with the Au precipitation being mostly related to dendritic quartz, UST quartz, and BQ. The well-preserved dendritic quartz with sector-zoned CL intensities and euhedral oscillatory growth zones crystallized rapidly during the late magmatic stage. The relatively low Al contents of dendritic quartz were interpreted to be related to accompanied feldspar or mica crystallization, while the high Ti contents indicate high crystallization temperatures (~750 ℃). The comb-layered UST quartz displays heterogeneous patchy luminescence with weak zoning, hosts coeval melt and fluid inclusions, and retains the chemical characteristics of magmatic dendritic quartz.High Ti and low Al contents of UST quartz suggest a formation at relatively high temperatures (~700 ℃) and high pH conditions. Three sub-types can be defined for This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America.The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

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