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The crustal thickness and composition in the eastern South China Block constrained by receiver functions: Implications for the geological setting and metallogenesis

文献类型：期刊论文

作者Zhang, Yongqian1,3,4; Shi, Danian1,3,4; Lu, Qingtian1,3,4; Xu, Yao1,4; Xu, Zhiwu1,4; Yan, Jiayong1,3,4; Chen, Changxin1,4; Xu, Tao2
刊名ORE GEOLOGY REVIEWS
出版日期2021-03-01
卷号130页码:14
ISSN号0169-1368
关键词South China Block Cathaysia Jiangnan Orogen Crustal thickness Vp/Vs ratio
DOI10.1016/j.oregeorev.2021.103988
英文摘要The eastern South China Block is characterized by multi-stage intra-continental collisions and orogeny from the Paleozoic to early Mesozoic, and strong magmatism and metallogenesis since the late Mesozoic. In order to further study the tectonics, magmatism and metallogenesis, we constructed a new model of crustal thickness and Vp/Vs ratio for the crust beneath the eastern South China Block using H-kappa stacking of teleseismic P-wave radial receiver functions from 845 broadband seismic stations. New knowledge of the crustal structure and properties pertinent to the tectonics and metallogenesis is as follows: (1) the average crustal thickness beneath the eastern South China Block is 33 km. It is thinner and varies smoothly in the Cathaysia Block and Jiangnan Orogen, and gradually thickens to the northwest and reaches similar to 40 km in the Yangtze Block; (2) the average crustal Vp/Vs ratio of the eastern South China Block is similar to 1.72, lower than the global average value similar to 1.78. This implies an absence of a mafic lower most crustal layer; (3) the Jiangnan Orogen is characterized by a conspicuous belt of lower Vp/Vs ratios, different from the Yangtze and Cathaysia Blocks on either side. This is interpreted as caused by synorogenic crustal thickening and the subsequent lower crustal delamination; (4) the crustal thickness and the Vp/Vs ratios in the eastern South China Block are negatively correlated, also indicating tectonic thickening of a felsic upper and middle crust. This is consistent with folding and thrusting during orogenesis and the later delamination of the mafic lower crust; (5) the Anhua-Luocheng fault is considered to be the southwestern segment of the boundary between the Yangtze Block and Jiangnan Orogen; (6) lithospheric extension caused by subduction of the Pacific Plate and the corresponding slab rollback during the late Mesozoic can explain the crustal thickness, the Vp/Vs ratio distribution patterns and the metallogenesis in the eastern South China Block.
WOS关键词UPPER-MANTLE STRUCTURE ; SURROUNDING AREAS CONSTRAINTS ; SOURCE SEISMIC EXPERIMENT ; STRUCTURE BENEATH ; SOUTHEASTERN CHINA ; TECTONIC EVOLUTION ; VELOCITY STRUCTURE ; DENSITY STRUCTURE ; POISSONS RATIO ; FELSIC ROCKS
资助项目National Key Research and Development Program of China[2016YFC0600201] ; National Natural Science Foundation of China[42074099] ; National Natural Science Foundation of China[41574082] ; National Natural Science Foundation of China[41804093] ; Basic Science Foundation of IMRCAGS, China[K1609] ; CAGS, China[JKY202005]
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
出版者ELSEVIER
WOS记录号WOS:000612042300001
资助机构National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Basic Science Foundation of IMRCAGS, China ; Basic Science Foundation of IMRCAGS, China ; CAGS, China ; CAGS, China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Basic Science Foundation of IMRCAGS, China ; Basic Science Foundation of IMRCAGS, China ; CAGS, China ; CAGS, China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Basic Science Foundation of IMRCAGS, China ; Basic Science Foundation of IMRCAGS, China ; CAGS, China ; CAGS, China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Basic Science Foundation of IMRCAGS, China ; Basic Science Foundation of IMRCAGS, China ; CAGS, China ; CAGS, China
源URL[http://ir.iggcas.ac.cn/handle/132A11/100059]  
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Zhang, Yongqian; Lu, Qingtian
作者单位1.Chinese Acad Geol Sci, Beijing 100037, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.CAGS, MNR Key Lab Metallogeny & Mineral Assessment, Inst Mineral Resources, Beijing 100037, Peoples R China
4.China Geol Survey, China Deep Explorat Ctr, SinoProbe Ctr, Beijing 100037, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Yongqian,Shi, Danian,Lu, Qingtian,et al. The crustal thickness and composition in the eastern South China Block constrained by receiver functions: Implications for the geological setting and metallogenesis[J]. ORE GEOLOGY REVIEWS,2021,130:14.
APA Zhang, Yongqian.,Shi, Danian.,Lu, Qingtian.,Xu, Yao.,Xu, Zhiwu.,...&Xu, Tao.(2021).The crustal thickness and composition in the eastern South China Block constrained by receiver functions: Implications for the geological setting and metallogenesis.ORE GEOLOGY REVIEWS,130,14.
MLA Zhang, Yongqian,et al."The crustal thickness and composition in the eastern South China Block constrained by receiver functions: Implications for the geological setting and metallogenesis".ORE GEOLOGY REVIEWS 130(2021):14.

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来源：地质与地球物理研究所

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