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Thermal evolution of the Upper Yangtze Craton: Secular cooling and short-lived thermal perturbations

文献类型：期刊论文

作者He, Lijuan1,2,3
刊名PHYSICS OF THE EARTH AND PLANETARY INTERIORS
出版日期2020-04-01
卷号301页码:10
关键词Thermal history Heat flow Numerical modeling Mantle plume Lithosphere extension Upper Yangtze Craton
ISSN号0031-9201
DOI10.1016/j.pepi.2020.106458
英文摘要The Upper Yangtze Craton (UYC) has stayed in a long-term stabilization state. Its thermal history can be portioned into two parts: secular evolutionary trend and short-lived thermal perturbations. The former is simulated by a two-dimensional forward transient thermal model, and the latter is discussed by reviewing previous studies. The numerical modeling indicates the UYC tended to be cooling as it adjusted to the asynchronous rates of change in the internal radiogenic heat production and in the convecting mantle temperature below the cratonic root. The average cooling rate of the UYC has been similar to 58 degrees C/Ga since the end of Archean, faster than that of the convecting mantle. The surface heat flow presents a decreasing trend from similar to 82 mW/m(2) at 2.5 Ga to similar to 53 mW/m(2) at present-day, which constructs the long-term evolutionary path. The thermal perturbations derived from the occasional tectono-thermal events, such as mantle plume activity and regional lithosphere extension, serves as paroxysmal factors. The thermal effects of the Emeishan mantle plume were very strong, yielding to the maximum heat flow anomaly of similar to 100 mW/m(2) at the Late Permian. In contrast, the influences of regional lithosphere extension during both the early Paleozoic period and the Early Permian-Middle Triassic period were rather weak, resulting in a surface heat flow increase of < 10 mW/m(2). These thermal anomalies disappeared after a time period depending on the thermal relaxation without altering the stability of the UYC, and then the thermal evolution of craton returned to its original cooling route. The thermal history of the UYC, the overprinting of the secular cooling and the short-lived perturbations, helps better understand the craton evolution and provide the fundamental thermal data for petroliferous-basin analysis.
WOS关键词SOUTH CHINA IMPLICATIONS ; LARGE IGNEOUS PROVINCE ; DEEP-CRUSTAL STRUCTURE ; TERRESTRIAL HEAT-FLOW ; SICHUAN BASIN ; LITHOSPHERIC STRUCTURE ; UPPER-MANTLE ; ISOTOPIC COMPOSITIONS ; GEOTHERMAL-FIELD ; ARCHEAN CRATONS
资助项目National Natural Science Foundation of China[41830424] ; National Natural Science Foundation of China[41574075]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000526831300003
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/95544]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者He, Lijuan
作者单位1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 He, Lijuan. Thermal evolution of the Upper Yangtze Craton: Secular cooling and short-lived thermal perturbations[J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS,2020,301:10.
APA He, Lijuan.(2020).Thermal evolution of the Upper Yangtze Craton: Secular cooling and short-lived thermal perturbations.PHYSICS OF THE EARTH AND PLANETARY INTERIORS,301,10.
MLA He, Lijuan."Thermal evolution of the Upper Yangtze Craton: Secular cooling and short-lived thermal perturbations".PHYSICS OF THE EARTH AND PLANETARY INTERIORS 301(2020):10.

入库方式： OAI收割

来源：地质与地球物理研究所

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