文献类型：期刊文献

英文题名：The evolution of eastern Sichuan basin, Yangtze block since Cretaceous: Constraints from low temperature thermochronology

作者：Shi, Hongcai[1];Shi, Xiaobin[2];Glasmacher, Ulrich A.[3];Yang, Xiaoqiu[2];Stockli, Daniel F.[4,5]

机构：[1]Guangdong Ocean Univ, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang 524088, Peoples R China;[2]Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marine Sea Geol, Guangzhou 510301, Guangdong, Peoples R China;[3]Heidelberg Univ, Inst Earth Sci, Res Grp Thermochronol & Archaeometry, D-69120 Heidelberg, Germany;[4]Univ Kansas, Dept Geol, Lawrence, KS 66045 USA;[5]Univ Texas Austin, Dept Geosci, Austin, TX 78712 USA

年份：2016

卷号：116

起止页码：208

外文期刊名：JOURNAL OF ASIAN EARTH SCIENCES

收录：SCI-EXPANDED(收录号：WOS:000369456000016)、、Scopus(收录号：2-s2.0-84949549498)、WOS

基金：Fig. 8 was plotted using GMT (Wessel and Smith, 1995). We are grateful to P. Eizenhofer, R.W. Grobe, and F.U. Bauer for the assistance in Heidelberg thermochronology laboratory. We thank Long Youkang who comes from Exploration and development research institute of Jianghan oil field branch company, SINOPEC for logistical support and the field assistance. This work was supported by the SINOPEC (YPH08057). This paper substantially benefited from helpful reviews and comments by Bor-ming Jahn, Michel Faure and two anonymous reviewers.

语种：英文

外文关键词：South China; Apatite fission-track (AFT); Apatite (U-Th-Sm)/He; Yangtze block; Exhumation

外文摘要：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.