Study on genesis, mineralization age and tectonic setting of Dangjiang copper polymetallic deposit in Zhiduo County, Qinghai Province

SHI Chao; PENG Xuan; HE Shiping; GU Pingyang; YU Pusheng

doi:10.12097/j.issn.1671-2552.2022.09.013

2022 Vol. 41, No. 9

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SHI Chao, PENG Xuan, HE Shiping, GU Pingyang, YU Pusheng. Study on genesis, mineralization age and tectonic setting of Dangjiang copper polymetallic deposit in Zhiduo County, Qinghai Province[J]. Geological Bulletin of China, 2022, 41(9): 1648-1656. doi: 10.12097/j.issn.1671-2552.2022.09.013

Citation:

SHI Chao, PENG Xuan, HE Shiping, GU Pingyang, YU Pusheng. Study on genesis, mineralization age and tectonic setting of Dangjiang copper polymetallic deposit in Zhiduo County, Qinghai Province[J]. Geological Bulletin of China, 2022, 41(9): 1648-1656. doi: 10.12097/j.issn.1671-2552.2022.09.013

Study on genesis, mineralization age and tectonic setting of Dangjiang copper polymetallic deposit in Zhiduo County, Qinghai Province

1.
Xi'an Center, CGS/Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, MNR, Xi'an 710054, Shaanxi, China
2.
Centre for Orogenic Belt Geology, CGS, Xi'an 710054, Shaanxi, China
3.
State Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi'an 710069, Shaanxi, China

Received Date: 10 March 2020

Revised Date: 12 October 2021

Publish Date: 15 September 2022

Abstract

Abstract

The Dangjiang copper polymetallic deposit, located in the northern section of the " Sanjiang metallogenic belt ", is newly discovered in 2014 in Duocai copper polymetallic deposit integrated exploration area in Zhidoi County, southern Qinghai Province.The mineralization age has not been precisely defined, and unified understanding of the genesis of Dangjiang copper polymetallic deposit has not been formed.LA- ICP-MS zircon U-Pb dating shows that the weighted mean age of rhyolite, which is closely related with copper, lead and zinc mineralization, is 227.5±1.7 Ma, in the Late Triassic.Through the comparative study with Galonggema copper polymetallic ore deposit and the analysis of its ore-bearing wall rock, alteration characteristics, ore minerals and ore types, It is believed that the ore-forming process is closely related with volcanic eruption, and the mineralization is formed in the volcanic rhythmical layer of the second rock formation in Batang Group.It is considered that the deposit is formed as volcanic exhalation sedimentation-superimposition reworking type, and the tectonism plays the role of superposition structure for enrichment of ore-forming elements.Comprehensively, we consider that Dangjiang copper polymetallic deposit is formed in the continental margin rift tectonic setting in the northern part of the north Qiangtang block, which provides a new perspective for further studying the tectonic setting of copper polymetallic deposits in the northern" Sanjiang metallogenic belt " and expanding prospecting.
- Dangjiang copper polymetallic deposit /
- rhyolite /
- LA-ICP-MS zircon U-Pb dating /
- tectonic environment /
- Qinghai Province /
- mineral exploration engineering

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