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

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

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

2018 Vol. 37, No. 6

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Guo-ren LIU, Yan LI, Rui WANG, Hai-pei WANG, Cheng-dong YANG, Qi CHEN, Shi-jun QI. 40Ar/39Ar Dating of Muscovite from the Zhelande Au Deposit, Irtysh Tectonic Zone, Xinjiang and Its Geological Implications[J]. Rock and Mineral Analysis, 2018, 37(6): 705-712. doi: 10.15898/j.cnki.11-2131/td.201707130118

Citation:

Guo-ren LIU, Yan LI, Rui WANG, Hai-pei WANG, Cheng-dong YANG, Qi CHEN, Shi-jun QI. ⁴⁰Ar/³⁹Ar Dating of Muscovite from the Zhelande Au Deposit, Irtysh Tectonic Zone, Xinjiang and Its Geological Implications[J]. Rock and Mineral Analysis, 2018, 37(6): 705-712. doi: 10.15898/j.cnki.11-2131/td.201707130118

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

1.
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
2.
No.7 Geological Party of the Hebei Bureau of Geology, Yanjiao 065201, China
3.
Key Laboratory of Metallogeny and Mineral Assessment, Ministry of National Resources; Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
4.
Xinjiang Urgur Autonomous Region Institute of Geology for Mineral Resources, Urumqi 830001, China

Received Date: 13 July 2017

Revised Date: 30 April 2018

Accepted Date: 11 June 2018

Abstract

Abstract

BACKGROUNDThe 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. OBJECTIVESTo determine the metallogenic age by ⁴⁰Ar/³⁹Ar method. METHODSMuscovite ⁴⁰Ar/³⁹Ar dating was used to constrain the timing of ductile shear deformation and gold mineralization. RESULTSResults 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. CONCLUSIONSCombined with previous data, the orogenic gold deposits in the Irtysh tectonic belt of Xinjiang possibly formed at 295-270 Ma.
- geological characteristics /
- Ar-Ar age /
- orogenic gold deposit /
- Zhelande /
- Irtysh tectonic zone

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