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学科主题: Geochemistry & Geophysics
题名: Exhumation process of Middle-Upper Yangtze since Cretaceous and its tectonic significance: low-temperature thermochronology constraints
作者: Shi, HC ; Shi, XB
通讯作者: hcshi@scsio.ac.cn ; xbshi@scsio.ac.cn
关键词: Yangtze block ; Fission track ; Uplift and denudation ; Tibetan Plateau ; Late Mesozoic and Cenozoic
刊名: CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
发表日期: 2014
卷: 57, 期:8, 页:2608-2619
收录类别: sci
部门归属: [Shi Hong-Cai ; Shi Xiao-Bin] Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China ; [Shi Hong-Cai] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
项目归属: 海洋地质
摘要: A total of 60 new apatite fission track (AFT) data from Middle-Upper Yangtze block provide a database to evaluate the Late Mesozoic and Cenozoic denudation and cooling history of Middle-Upper Yangtze block on a regional scale; combined with the previous published AFT data, the temporal-spatial correlation is preliminarily constructed between regional Cenozoic tectonic activities and intra-continental deformation. The difference in denudation or cooling history among each part is regionalized and successive in space, and is episodic in time. It was first deformed and folded in Jianghan bansin and Huangling uplift, and then the onset timing of formation becomes later from N(E) to S(W) in Micasngshan and Dabashan, while others become later from southeast to northwest, including Xiang'exi, east and northeast Sichuan basin, which stands for the characteristics of spatial variation. Episodic characteristics of tectonic movement in time are mainly shown as alternative rapid cooling processes and slow cooling processes. The age of the AFT from different geological units in Micang shan and Daba shan becomes smaller from N(E) to S (W), which means that it was controlled by the thrusting compression of Qinling-Dabie orogen in Late Mesozoic and Cenozoic; while the age of the AFT from Xiang'exi, east and northeast Sichuan basin becomes smaller from southeast to northwest, standing for the far-field effect of subduction of Pacific plate. The rapid exhumation and cooling event in Late Cenozoic was atributed to uplifting and the northeastward growth of the Tibetan Plateau and onset of the Asian monsoon. The systematic analysis of AFT can provide geochronological constraints on the progressive expansion tectonic deformation of the Middle-Upper Yangtze block.
原文出处: 查看原文
WOS记录号: WOS:000341070200020
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10609
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Recommended Citation:
Shi, HC; Shi, XB.Exhumation process of Middle-Upper Yangtze since Cretaceous and its tectonic significance: low-temperature thermochronology constraints,CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2014,57(8):2608-2619
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