Cenozoic Magmatism and Tectonic Framework of Western Yunnan, China: Constrained from Geochemistry, Sr-Nd-Pb Isotopes and Fission Track Dating

doi:10.1111/1755-6724.12810

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 兰州油气中心

	Cenozoic Magmatism and Tectonic Framework of Western Yunnan, China: Constrained from Geochemistry, Sr-Nd-Pb Isotopes and Fission Track Dating
	Yang Xin 1,2,3,4; Xu Xuhui 4; Zhang Zhongpei 1; Liu Yifeng 5; Zhang Jibiao 1; Liu Xingwang 2,3; Xiong Ping 1; Zheng Jianjing 2,3
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2016-10-01
卷号	90 期号:5 页码:1679-1698
关键词	Magmatism Geochemistry Fission Track Dating Cenozoic Western Yunnan
DOI	10.1111/1755-6724.12810
文献子类	Article
英文摘要	Western Yunnan is composed of several extruded continental microblocks that were generated by the oblique collision between the Indian and Asian continents during the Cenozoic. In this study, the magmatic and tectonic frameworks of western Yunnan in the Cenozoic were analyzed based on geochemistry, Sr-Nd-Pb isotopes, and apatite/zircon fission track dating. Magmatism during the Cenozoic in western Yunnan was then divided into three distinctive episodes: alkali granite rocks produced from 55 to 46 Ma were derived from the anatexis of crustal materials; bimodal igneous rocks formed between 37 and 24 Ma were possibly derived from an EMII mantle with a contribution from continental materials; and intermediate basic volcanic rocks produced in the Tengchong microblocks since similar to 16 Ma are considered to be generated by the partial melting of the upper mantle that was induced by the pulling apart of the dextral Gaoligong strike-lip fault system. Moreover, fission track analysis of apatite and zircon indicates that the regional crustal uplift in western Yunnan possibly began at similar to 34 Ma, with accelerated annealing occurring at similar to 24 Ma, similar to 13 Ma, and similar to 4 Ma. During the past 24 Ma, the average denudation rate was similar to 0.32 mm/yr for the faulted block controlled by the Chongshan-Lancang River fault. However, crustal uplift has been relatively gentle in places lacking influence from strike-slip shear zones, with an average denudation rate of similar to 0.2 mm/yr. Combined with strike slip shear and block rotation in the Cenozoic, the tectonic evolution of western Yunnan since similar to 45 Ma can thus be divided into four stages occurring at 45-37 Ma, 37-24 Ma, 24-13 Ma, and 13-0 Ma.
WOS关键词	RIVER SHEAR ZONE ; EASTERN HIMALAYAN SYNTAXIS ; BENEATH SOUTHERN TIBET ; INDIA-ASIA COLLISION ; TETHYAN UPPER-MANTLE ; VOLCANIC-ROCKS ; AILAO-SHAN ; CRETACEOUS ROCKS ; STRIKE-SLIP ; SW CHINA
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000388268400009
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53249]
专题	地质与地球物理研究所_兰州油气中心
作者单位	1.SINOPEC Petr Explorat & Dev Res Inst, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Gansu Prov Key Lab Petr Resources, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Lanzhou 730000, Peoples R China 4.SINOPEC, Wuxi Inst Petr Geol, Wuxi 214126, Jiangsu, Peoples R China 5.China Univ Petr, State Key Lab Petr Resource & Prospecting, Beijing 102249, Peoples R China
推荐引用方式 GB/T 7714	Yang Xin,Xu Xuhui,Zhang Zhongpei,et al. Cenozoic Magmatism and Tectonic Framework of Western Yunnan, China: Constrained from Geochemistry, Sr-Nd-Pb Isotopes and Fission Track Dating[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2016,90(5):1679-1698.
APA	Yang Xin.,Xu Xuhui.,Zhang Zhongpei.,Liu Yifeng.,Zhang Jibiao.,...&Zheng Jianjing.(2016).Cenozoic Magmatism and Tectonic Framework of Western Yunnan, China: Constrained from Geochemistry, Sr-Nd-Pb Isotopes and Fission Track Dating.ACTA GEOLOGICA SINICA-ENGLISH EDITION,90(5),1679-1698.
MLA	Yang Xin,et al."Cenozoic Magmatism and Tectonic Framework of Western Yunnan, China: Constrained from Geochemistry, Sr-Nd-Pb Isotopes and Fission Track Dating".ACTA GEOLOGICA SINICA-ENGLISH EDITION 90.5(2016):1679-1698.