40Ar/39Ar Dating of Muscovite from the Zhelande Au Deposit, Irtysh Tectonic Zone, Xinjiang and Its Geological Implications

LIU Guo-ren; LI Yan; WANG Rui; WANG Hai-pei; YANG Cheng-dong; CHEN Qi; QI Shi-jun

doi:10.15898/j.cnki.11-2131/td.201707130118

Yankuang ceshi (Nov 2018)

40Ar/39Ar Dating of Muscovite from the Zhelande Au Deposit, Irtysh Tectonic Zone, Xinjiang and Its Geological Implications

LIU Guo-ren,
LI Yan,
WANG Rui,
WANG Hai-pei,
YANG Cheng-dong,
CHEN Qi,
QI Shi-jun

Affiliations

LIU Guo-ren: Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
LI Yan: No.7 Geological Party of the Hebei Bureau of Geology, Yanjiao 065201, China
WANG Rui: Key Laboratory of Metallogeny and Mineral Assessment, Ministry of National Resources; Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
WANG Hai-pei: Xinjiang Urgur Autonomous Region Institute of Geology for Mineral Resources, Urumqi 830001, China
YANG Cheng-dong: Key Laboratory of Metallogeny and Mineral Assessment, Ministry of National Resources; Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
CHEN Qi: Xinjiang Urgur Autonomous Region Institute of Geology for Mineral Resources, Urumqi 830001, China
QI Shi-jun: Xinjiang Urgur Autonomous Region Institute of Geology for Mineral Resources, Urumqi 830001, China

DOI: https://doi.org/10.15898/j.cnki.11-2131/td.201707130118
Journal volume & issue: Vol. 37, no. 6
pp. 705 – 712

Abstract

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BACKGROUND The Zhelande gold deposit is an important orogenic gold deposit in the Irtysh tectonic belt. This deposit is hosted in the ductile shear zone. Mineralization occurs as gold-bearing pyritized diorite veins, gold-bearing quartz veins, and gold-bearing pyritized phyllite. The mineralization is related to the brittle-ductile shear deformation. Muscovite, chlorite and other new minerals occurred in the shear surface. OBJECTIVES To determine the metallogenic age by 40Ar/39Ar method. METHODS Muscovite 40Ar/39Ar dating was used to constrain the timing of ductile shear deformation and gold mineralization. RESULTS Results show that the plateau age of the muscovite is 295.4±1.6 Ma, suggesting that the ductile shear deformation and gold mineralization occurred at about 295 Ma, slightly earlier than the formation of the Duolanasayi gold deposit. CONCLUSIONS Combined with previous data, the orogenic gold deposits in the Irtysh tectonic belt of Xinjiang possibly formed at 295-270 Ma.

Published in Yankuang ceshi

ISSN: 0254-5357 (Print)
Publisher: Science Press, PR China
Country of publisher: China
LCC subjects: Science: Geology; Science: Biology (General): Ecology
Website: http://www.ykcs.ac.cn/indexen.htm

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