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The evolution of eastern Sichuan basin, Yangtze block since Cretaceous: Constraints from low temperature thermochronology
Shi, Hongcai; Shi, Xiaobin; Glasmacher, Ulrich A.; Yang, Xiaoqiu; Stockli, Daniel F.; Shi, XB (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marine Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.
2016
发表期刊JOURNAL OF ASIAN EARTH SCIENCES
卷号116页码:208-221
摘要In Yangtze block (South China), there is a well-developed Mesozoic thrust system extended through the Xuefeng and Wuling mountains in the southeast to the Sichuan basin in the northwest. We present 11 apatite fission-track (AFT) data and 11 (U-Th-Sm)/He ages to unravel the low temperature thermal history of a part of the system located in the eastern Sichuan basin. The fission-track data are interpreted using a grain-age deconvolution algorithm with inverse thermal modeling of track length, grain ages and mineral composition proxy data. Results suggest that apatite fission-track ages range between 993 +/- 8.1 and 51.0 +/- 4.0 Ma, and the apatite (U-Th-Sm)/He ages between 58.3 +/- 3.5 Ma and 14.2 +/- 0.9. The spatial distribution of these ages shows a trend decreased from SE to NW gradually, which supports the idea of a prolonged, steady-state rock uplift and erosion process across the eastern Sichuan basin. Thermal history modeling of the combined FT and (U-Th-Sm)/He datasets reveal a common three stage cooling history: (1) initial stage of rapid cooling that younger to the east during pre-Cretaceous, (2) following by a period of relative (but not perfect) thermal stability at similar to 65-50 degrees C, (3) and then a new rapid cooling stage that initiated in all samples between similar to 15 and 20 Ma. The first rapid cooling at a rate of >= 1.5 degrees C/Ma is associated with coeval tectonism in nearby regions, which result in folds and faults of the eastern Sichuan basin. Early-mid Cenozoic thermal stability is contributed to the extension widely occurring in the eastern China continent at which the average cooling rate decreased to similar to 0.16 degrees C/Ma. Causes for speculative accelerated cooling after ca. 20-15 Ma with a rate of >= 1.2 degrees C/Ma may be a far field effect of upward and eastward growth of the Tibetan Plateau but could also be related to climate effects. In a whole, this paper analyzes the several Mesozoic and Cenozoic tectonic events influence to the patters of regional denudation. (C) 2015 Elsevier Ltd. All rights reserved.
部门归属[Shi, Hongcai] Guangdong Ocean Univ, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang 524088, Peoples R China; [Shi, Xiaobin; Yang, Xiaoqiu] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marine Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Glasmacher, Ulrich A.] Heidelberg Univ, Inst Earth Sci, Res Grp Thermochronol & Archaeometry, D-69120 Heidelberg, Germany; [Stockli, Daniel F.] Univ Kansas, Dept Geol, Lawrence, KS 66045 USA; [Stockli, Daniel F.] Univ Texas Austin, Dept Geosci, Austin, TX 78712 USA ; 边缘海地质
关键词South China Apatite Fission-track (Aft) Apatite (U-th-sm)/he Yangtze Block Exhumation
学科领域Geology
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/15597
专题中科院边缘海地质重点实验室
通讯作者Shi, XB (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marine Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.
推荐引用方式
GB/T 7714
Shi, Hongcai,Shi, Xiaobin,Glasmacher, Ulrich A.,et al. The evolution of eastern Sichuan basin, Yangtze block since Cretaceous: Constraints from low temperature thermochronology[J]. JOURNAL OF ASIAN EARTH SCIENCES,2016,116:208-221.
APA Shi, Hongcai,Shi, Xiaobin,Glasmacher, Ulrich A.,Yang, Xiaoqiu,Stockli, Daniel F.,&Shi, XB .(2016).The evolution of eastern Sichuan basin, Yangtze block since Cretaceous: Constraints from low temperature thermochronology.JOURNAL OF ASIAN EARTH SCIENCES,116,208-221.
MLA Shi, Hongcai,et al."The evolution of eastern Sichuan basin, Yangtze block since Cretaceous: Constraints from low temperature thermochronology".JOURNAL OF ASIAN EARTH SCIENCES 116(2016):208-221.
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