藏东类乌齐-左贡成矿带地果大型石墨矿床含矿岩体时代与矿床成因

何亮; 代顺军; 邵锐; 杜秋; 德央; 扎西平措; 尊珠桑姆; 巴桑多吉; 章奇志

doi:10.3799/dqkx.2020.103

Volume 45 Issue 8

Aug. 2020

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Article Navigation > Earth Science > 2020 > 45(8): 2932-2944

He Liang, Dai Shunjun, Shao Rui, Du Qiu, De Yang, Zhaxi Pingcuo, Zunzhu Sangmu, Basang Duoji, Zhang Qizhi, 2020. Ore-Bearing Granite Age and Genesis of Diguo Large-Scale Graphite Deposit in Leiwuqi-Zuogong Metallogenic Belt, Eastern Tibet. Earth Science, 45(8): 2932-2944. doi: 10.3799/dqkx.2020.103

Citation:

He Liang, Dai Shunjun, Shao Rui, Du Qiu, De Yang, Zhaxi Pingcuo, Zunzhu Sangmu, Basang Duoji, Zhang Qizhi, 2020. Ore-Bearing Granite Age and Genesis of Diguo Large-Scale Graphite Deposit in Leiwuqi-Zuogong Metallogenic Belt, Eastern Tibet. Earth Science, 45(8): 2932-2944. doi: 10.3799/dqkx.2020.103

Citation:

He Liang, Dai Shunjun, Shao Rui, Du Qiu, De Yang, Zhaxi Pingcuo, Zunzhu Sangmu, Basang Duoji, Zhang Qizhi, 2020. Ore-Bearing Granite Age and Genesis of Diguo Large-Scale Graphite Deposit in Leiwuqi-Zuogong Metallogenic Belt, Eastern Tibet. Earth Science, 45(8): 2932-2944. doi: 10.3799/dqkx.2020.103

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Ore-Bearing Granite Age and Genesis of Diguo Large-Scale Graphite Deposit in Leiwuqi-Zuogong Metallogenic Belt, Eastern Tibet

doi: 10.3799/dqkx.2020.103

1.
College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
2.
No.6 Geological Party, Tibet Bureau of Geology and Mineral Exploration and Development, Lhasa 851400, China

Received Date: 2020-04-11
Publish Date: 2020-08-15

Abstract

Abstract

In recent years,great progress has been made in the exploration of graphite deposits from Leiwuqi-Zuogong metallogenic belt,Tibet. The Diguo graphite deposit is one of the three large-scale graphite deposits which have been discovered recently. However,the geological background,genetic type and mineralization mechanism are still not clear,which has restricted the resources potential assessment of the metallogenic belt. Field geological survey,zircon U-Pb,carbon isotope analysis,and scanning electron microscopy (SEM) have been done for the Diguo deposit. Zircon U-Pb dating results show that the age of the ore-bearing monzogranite is 239.1 ±1.8 Ma,and the ages of the inherit zircon are concentrated in the Early Carboniferous (347-326 Ma). The carbon δ¹³C isotopic values reveal the organic origin of the carbon in the ore. This study shows that Diguo graphite deposit was constrained by both carbonous strata and the Middle Triassic intrusions,and belongs to the complex type which is the mix of magmatic type and contact metamorphic type. The emplacement time of the ore-bearing monzogranite represents the mineralization age of the graphite deposit approximately,which is the Middle Triassic. The regional metallogenic conditions show that the Leiwuqi-Zuogong metallogenic belt has a good exploration potential for the graphite deposits,the connection zone between the Middle Triassic intrusion and the carbonous Kagong stratum might be the key areas of the prospecting breakthrough.
- Leiwuqi-Zuogong metallogenic belt,
- zircon U-Pb age,
- magmatic mix,
- deposit genesis,
- Diguo graphite deposit,
- Tibet,
- geochronology

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References(48)

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