Apatite (U-Th)/He Thermochronology Evidence for Two Cenozoic Denudation Events in Eastern Part of Sulu Orogenic Belt

被引：0
|
作者：
Lin X. [1 ,2 ,3 ]
Wu L. [2 ]
Jolivet M. [4 ]
Li C. [3 ]
Liu H. [5 ]
机构：
[1] School of Civil Engineering and Architecture, China Three Gorges University, Yichang
[2] Ar-Ar and (U-Th)/He Geochronology Laboratory, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing
[3] School of Geography and Information Engineering, China University of Geosciences, Wuhan
[4] Faculty of Earth Sciences, France University I Rennes, Rennes
[5] School of Earth Sciences, East China Institute of Technology, Nanchang
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2022年 / 47卷 / 04期
关键词：
(U-Th)/He thermochronology; Apatite uplift; Sulu orogenic belt; Tectonics;
D O I：
10.3799/dqkx.2021.083
中图分类号：
学科分类号：
摘要：
The Sulu orogenic belt, located between the North China and South China plates, is one of the most prominent intracontinental orogenic belt in eastern China. Therefore, the denudation history of Sulu orogenic belt provides significant insight into the basin-mountain evolution in eastern China and their dynamic mechanism. Due to the apatite (U-Th)/He system has low closure temperature (ca. 70 ℃), it can constrain the cooling processes of geological bodies more accurately in the upper crust. In this study, the apatite (U-Th)/He method was used to analyze the exhumation time of rocks on the Duofu and Juchi mountains located in the eastern parts of Sulu orogenic belt. The apatite (U-Th)/He age-elevation relationship and thermal history simulation results show that the exhumation occurred in the Early-Middle Eocene (54-43 Ma) and Oligocene (35-27 Ma) for the Duofu and Juchi mountains, respectively. These cooling episodes were synchronized with the exhumation time of the western part of the Sulu orogenic belt. Combined with the results reported in the region, it is shown that the eastern China was influenced by the Pacific and Indian plates subduction into Eurasia, and the extensive exhumation process occurred in the Early Cenozoic, which established the basin-mountain distribution pattern during this time. © 2022, Editorial Department of Earth Science. All right reserved.
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页码：1162 / 1176
页数：14
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