气候变化领域集成服务门户(CCPortal): Petrogenesis of the Late Eocene to Early Oligocene Yao'an Shoshonitic Complex, Southeastern Tibet: Partial Melting of an Ancient Continental Lithospheric Mantle beneath the Yangtze Block

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DOI	10.1111/1755-6724.15059
	Petrogenesis of the Late Eocene to Early Oligocene Yao'an Shoshonitic Complex, Southeastern Tibet: Partial Melting of an Ancient Continental Lithospheric Mantle beneath the Yangtze Block
	Dong, Mengmeng; Yang, Tiannan; Xue, Chuandong; Xin, Di; Liang, Mingjuan; Yan, Qinggao
发表日期	2023
ISSN	1000-9515
EISSN	1755-6724
起始页码	1657
结束页码	1670
卷号	97 期号:6
英文摘要	Cenozoic potassic-ultrapotassic igneous rocks are widespread in the southeastern Tibetan Plateau. Their petrogenesis and magmatic processes remain subject to debate in spite of numerous publications. Almost all of the Cenozoic extrusive and intrusive rocks in the Yao'an area, western Yunnan Province, SW China, are geochemically shoshonitic, collectively termed here the Yao'an Shoshonitic Complex (YSC). The YSC is located in the (south)easternmost part of the ENE-WSW-trending, similar to 550 km-long and similar to 250 km-wide Cenozoic magmatic zone; the latter separates the orthogonal and oblique collision belts of the India-Eurasia collision orogen. Previously published geochronological and thermochronological data revealed that the rocks of the YSC were emplaced over a short timespan of 34-32 Ma. This and our new data suggest that the primary magma of the YSC likely was formed by partial melting of ancient continental lithospheric mantle beneath the Yangtze Block. This part of the continental lithospheric mantle had likely not been modified by any oceanic subduction. Fractionation crystallization of an Mg-and Ca-bearing mineral and Ti-Fe oxides during the magmatic evolution probably account for the variable lithologies of the YSC.
关键词	Ancient continental lithospheric mantle Partial melting Yao'an Shoshonitic Complex Late Eocene to early Oligocene SE Tibetan Plateau
英文关键词	SR-ND-PB; INDIA-ASIA COLLISION; WESTERN YUNNAN CONSTRAINTS; ALKALINE VOLCANIC-ROCKS; CU-AU MINERALIZATION; GOLD DEPOSIT; ISOTOPIC CHARACTERISTICS; POTASSIC ROCKS; EASTERN TIBET; SE TIBET
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001133280000016
来源期刊	ACTA GEOLOGICA SINICA-ENGLISH EDITION
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283484
作者单位	China Geological Survey; Chinese Academy of Geological Sciences; Institute of Geology, Chinese Academy of Geological Sciences; Peking University; Kunming University of Science & Technology; China Geological Survey; Chinese Academy of Geological Sciences
推荐引用方式 GB/T 7714	Dong, Mengmeng,Yang, Tiannan,Xue, Chuandong,et al. Petrogenesis of the Late Eocene to Early Oligocene Yao'an Shoshonitic Complex, Southeastern Tibet: Partial Melting of an Ancient Continental Lithospheric Mantle beneath the Yangtze Block[J],2023,97(6).
APA	Dong, Mengmeng,Yang, Tiannan,Xue, Chuandong,Xin, Di,Liang, Mingjuan,&Yan, Qinggao.(2023).Petrogenesis of the Late Eocene to Early Oligocene Yao'an Shoshonitic Complex, Southeastern Tibet: Partial Melting of an Ancient Continental Lithospheric Mantle beneath the Yangtze Block.ACTA GEOLOGICA SINICA-ENGLISH EDITION,97(6).
MLA	Dong, Mengmeng,et al."Petrogenesis of the Late Eocene to Early Oligocene Yao'an Shoshonitic Complex, Southeastern Tibet: Partial Melting of an Ancient Continental Lithospheric Mantle beneath the Yangtze Block".ACTA GEOLOGICA SINICA-ENGLISH EDITION 97.6(2023).