西苏门答腊实武牙地区晚三叠世花岗岩锆石年代学及其特提斯构造意义

余小清; 钱鑫; 卢向红; 徐畅; 张玉芝; 甘成势; 王岳军

doi:10.3799/dqkx.2021.039

Volume 46 Issue 8

Aug. 2021

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Article Navigation > Earth Science > 2021 > 46(8): 2873-2886

Yu Xiaoqing, Qian Xin, Lu Xianghong, Xu Chang, Zhang Yuzhi, Gan Chengshi, Wang Yuejun, 2021. Zircon U-Pb Geochronology of Late Triassic Granites from Sibolga Area in Western Sumatra and Its Tethyan Tectonic Implications. Earth Science, 46(8): 2873-2886. doi: 10.3799/dqkx.2021.039

Citation:

Yu Xiaoqing, Qian Xin, Lu Xianghong, Xu Chang, Zhang Yuzhi, Gan Chengshi, Wang Yuejun, 2021. Zircon U-Pb Geochronology of Late Triassic Granites from Sibolga Area in Western Sumatra and Its Tethyan Tectonic Implications. Earth Science, 46(8): 2873-2886. doi: 10.3799/dqkx.2021.039

Citation:

Yu Xiaoqing, Qian Xin, Lu Xianghong, Xu Chang, Zhang Yuzhi, Gan Chengshi, Wang Yuejun, 2021. Zircon U-Pb Geochronology of Late Triassic Granites from Sibolga Area in Western Sumatra and Its Tethyan Tectonic Implications. Earth Science, 46(8): 2873-2886. doi: 10.3799/dqkx.2021.039

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Zircon U-Pb Geochronology of Late Triassic Granites from Sibolga Area in Western Sumatra and Its Tethyan Tectonic Implications

doi: 10.3799/dqkx.2021.039

Yu Xiaoqing^{1, 2
,
,},
Qian Xin^{1, 2
,
,},
Lu Xianghong^{1, 2},
Xu Chang^{1, 2},
Zhang Yuzhi^{1, 2},
Gan Chengshi^{1, 2},
Wang Yuejun^{1, 2}

1.
Guangdong Provincial Key Lab of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
2.
Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519000, China

Received Date: 2021-03-05
Available Online: 2021-09-14
Publish Date: 2021-08-15

Abstract

Abstract

The Sumatra Island, located in the Tethyan tectonic domain, preserves abundant granitoids with various ages and petrogenesis. The paucity of precise geochronological data for these granitoids has hampered our understanding on the extension and tectonic setting of magmatic belts in Southeast Asia. Precise zircon U-Pb geochronological data for granites from the Sibolga area in western Sumatra are presented in this study. Our results suggest that zircon grains from these samples are of igneous origin. LA-ICP-MS zircon U-Pb dating yields crystallization ages of 215.1±2.4 Ma (MSWD=0.14), 206.1±5 Ma (MSWD=0.22) and 214.3±5 Ma (MSWD=0.11) for granites respectively, indicating the Late Triassic magmatism in western Sumatra. Comparing with those of contemporary igneous rocks in Southeast Asia, it proposes that the Late Triassic granites in the Sibolga area are consistent with the West Province granite. Therefore, these granites might be formed in a back-arc rift setting in response to the initial subduction of the Mesotethyan Ocean during the Late Triassic.
- western Sumatra,
- Late Triassic,
- granite,
- zircon U-Pb age,
- geochronology,
- eastern Tethys

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References(58)

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Zircon U-Pb Geochronology of Late Triassic Granites from Sibolga Area in Western Sumatra and Its Tethyan Tectonic Implications

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