气候变化领域集成服务门户(CCPortal): Petrogenesis of mafic and felsic rocks from the Comei large igneous province, South Tibet: Implications for the initial activity of the Kerguelen plume

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DOI	10.1130/B31653.1
	Petrogenesis of mafic and felsic rocks from the Comei large igneous province, South Tibet: Implications for the initial activity of the Kerguelen plume
	Zhou Q.; Liu Z.; Lai Y.; Wang G.-C.; Liao Z.; Li Y.-X.; Wu J.-Y.; Wang S.; Qing C.-S.
发表日期	2018
ISSN	167606
起始页码	811
结束页码	824
卷号	130 期号:2021-05-06
英文摘要	The role of the Kerguelen plume in breaking up eastern Gondwana is so far unclear. Recently, the initial magmatic record of the plume has been identified in the Comei igneous province, Tethyan Himalaya. In this contribution, we investigated a group of basaltic intrusions (Juelongpu and Zhaxikang) and felsic lavas (Sangxiu) from the Comei igneous province. Laser ablation-inductively coupled plasma-mass spectrometry zircon U-Pb dating indicates that these mafic and felsic rocks were emplaced in the Early Cretaceous (ca. 140-137 Ma). Probably originating from the Kerguelen plume, the Juelongpu and Zhaxikang mafic rocks are characterized by high incompatible element abundances, high Nb/Y ratios, and oceanic-island basalt- like rare earth element and trace-element patterns. The Sangxiu felsic samples share A-type affinities and were derived by partial melting of crustal rocks. These mafic and felsic rocks represent a magmatic response to the initial activity of the Kerguelen plume. Their ages (ca. 140-137 Ma) are older than the timing of initial breakup of eastern Gondwana (ca. 137-136 Ma), indicating that the plume must have been incubating underneath the supercontinent before the breakup. Recent plate reconstructions coupled with our geochemical and geochronological constraints suggest that the Kerguelen plume head was resident under the Comei area of Greater India. at ca. 140 Ma. Our results, in conjunction with previous studies, support the viewpoint that the Kerguelen plume played an active role in breaking up eastern Gondwana. © 2017 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185033
作者单位	Chengdu Institute of Geology and Mineral Resources, Chinese Geological Survey, Chengdu, 610081, China; School of Earth Sciences, Gansu Key Laboratory of Mineral Resources in Western China, Lanzhou University, Lanzhou, 730000, China; State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210046, China
推荐引用方式 GB/T 7714	Zhou Q.,Liu Z.,Lai Y.,et al. Petrogenesis of mafic and felsic rocks from the Comei large igneous province, South Tibet: Implications for the initial activity of the Kerguelen plume[J],2018,130(2021-05-06).
APA	Zhou Q..,Liu Z..,Lai Y..,Wang G.-C..,Liao Z..,...&Qing C.-S..(2018).Petrogenesis of mafic and felsic rocks from the Comei large igneous province, South Tibet: Implications for the initial activity of the Kerguelen plume.Bulletin of the Geological Society of America,130(2021-05-06).
MLA	Zhou Q.,et al."Petrogenesis of mafic and felsic rocks from the Comei large igneous province, South Tibet: Implications for the initial activity of the Kerguelen plume".Bulletin of the Geological Society of America 130.2021-05-06(2018).