辽东五龙金矿周缘早白垩世花岗岩体侵位深度及其地质意义

李建锋; 刘建民; 胡国辉; 王伟; 张琪琪; 张拴宏

doi:10.3799/dqkx.2020.324

Volume 46 Issue 5

May 2021

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Article Navigation > Earth Science > 2021 > 46(5): 1585-1596

Li Jianfeng, Liu Jianmin, Hu Guohui, Wang Wei, Zhang Qiqi, Zhang Shuanhong, 2021. Emplacement Depth of Early Cretaceous Granitoid Intrusions in Periphery of Wulong Gold Deposit in Liaodong Peninsula and Their Geological Implications. Earth Science, 46(5): 1585-1596. doi: 10.3799/dqkx.2020.324

Citation:

Li Jianfeng, Liu Jianmin, Hu Guohui, Wang Wei, Zhang Qiqi, Zhang Shuanhong, 2021. Emplacement Depth of Early Cretaceous Granitoid Intrusions in Periphery of Wulong Gold Deposit in Liaodong Peninsula and Their Geological Implications. Earth Science, 46(5): 1585-1596. doi: 10.3799/dqkx.2020.324

Citation:

Li Jianfeng, Liu Jianmin, Hu Guohui, Wang Wei, Zhang Qiqi, Zhang Shuanhong, 2021. Emplacement Depth of Early Cretaceous Granitoid Intrusions in Periphery of Wulong Gold Deposit in Liaodong Peninsula and Their Geological Implications. Earth Science, 46(5): 1585-1596. doi: 10.3799/dqkx.2020.324

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Emplacement Depth of Early Cretaceous Granitoid Intrusions in Periphery of Wulong Gold Deposit in Liaodong Peninsula and Their Geological Implications

doi: 10.3799/dqkx.2020.324

Li Jianfeng^{1, 2
,
,},
Liu Jianmin^{1, 2},
Hu Guohui^{1, 2},
Wang Wei³,
Zhang Qiqi^{1, 2},
Zhang Shuanhong^{1, 2}

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Key Laboratory of Paleomagnetism and Tectonic Reconstruction, Ministry of Natural Resources, Beijing 100081, China
3.
103 Brigade of Nonferrous Geological Bureau of Liaoning Province, Dandong 118008, China

Received Date: 2020-09-22
Publish Date: 2021-05-15

Abstract

Abstract

Early Cretaceous magmatism in the Liaodong Peninsula is of great significance for the formation of Wulong gold deposit and probably provided the heat source and power for the gold-bearing fluid. Results from geothermobarometry of hornblende-plagioclase applied to the Early Cretaceous Sanguliu and Wulongbei granitoid intrusions,located in the north and south parts of the Wulong area respectively,demonstrate that hornblendes in the Sanguliu and Wulongbei granitoid intrusions crystallized at temperatures from 640.8 to 757.4 ℃ and the emplacement depth of the magma is from 5.9 to 9.7 km. On the TiO₂-Al₂O₃ diagram,samples from the Sanguliu and Wulongbei granitoid intrusions plot in the area of mixed source of crust and mantle. The difference of the emplacement depth between the Sanguliu and Wulongbei granitoid intrusions indicates that the large areas of emergence of the Wulong,Sanguliu and Wulongbei granitoid intrusions were formed by the strong differential exhumation and denudation during the times from late Late Cretaceous to Early Eocene and from Late Eocene to Oligocene. Simultaneously,the gold-bearing veins reached the near surface by regional uplift. The Wulong area is worth further gold exploration considering that the Liaodong Peninsula has the similar tectonic settings with the Jiaodong Peninsula.
- Early Cretaceous,
- Wulong gold deposit,
- hornblende-plagioclase geothermobarometry,
- emplacement depth of pluton,
- magma source,
- mineral deposits

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References(66)

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