气候变化领域集成服务门户(CCPortal): Coherent Chemical Variation Trends of the 55-25 Ma Magmatic Rocks in SE Tibet: N-S Direction Lithospheric Stretching of Eurasia during Early Stage of India-Eurasia Collision

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DOI	10.1111/1755-6724.15115
	Coherent Chemical Variation Trends of the 55-25 Ma Magmatic Rocks in SE Tibet: N-S Direction Lithospheric Stretching of Eurasia during Early Stage of India-Eurasia Collision
	Yang, Tiannan; Dong, Mengmeng; Xue, Chuandong; Xin, Di; Liang, Mingjuan
发表日期	2023
ISSN	1000-9515
EISSN	1755-6724
起始页码	1283
结束页码	1305
卷号	97 期号:5
英文摘要	The progressive indentation of India into Eurasia generated an E-W-trending orthogonal collision belt and a N-S-trending oblique collision belt. Compiling available data reveals that similar to 70% of the Cenozoic igneous rocks in eastern and southeastern Tibet are concentrated within an ENE-trending, similar to 550-km long and similar to 250-km wide magmatic zone (CMZ) that once separated the orthogonal and oblique collision belts. The Latitude 26 degrees N Line is now its southern boundary. The onset timing of magmatism of the CMZ varies gradually from similar to 55 Ma in the westernmost part to similar to 27 Ma in the easternmost. Then the magmatism successively occurred and suddenly stopped at similar to 25 Ma. The segmented and coherent chemical variation trends found suggest that the CMZ magmatic rocks were formed due to partial melting of the heterogeneous upper mantle and crusts of Eurasia. Subduction of Paleo- and Neotethyan oceanic plates generated this compositional and mineralogical heterogeneity. Combined with available geophysical data, the CMZ was diachronously formed in response to asthenosphere upwelling induced by NNW-SSE-direction lithosphere stretching. The difference in responses of the orthogonal and oblique collision belts to the indentation of the Indian continent has led to this lithosphere stretching. image
关键词	tectonics geochemistry magmatic zone temporal/spatial distribution lithospheric stretch Eocene to Oligocene SE Tibet
英文关键词	SHAN-RED RIVER; HOH XIL BASIN; WESTERN YUNNAN PROVINCE; SANJIANG OROGENIC BELT; SHEAR ZONE; EASTERN TIBET; GEOCHEMICAL CONSTRAINTS; ASIA COLLISION; VOLCANIC-ROCKS; STRUCTURAL EVOLUTION
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001093353000001
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/282917
作者单位	China Geological Survey; Institute of Geology, Chinese Academy of Geological Sciences; Chinese Academy of Geological Sciences; Kunming University of Science & Technology
推荐引用方式 GB/T 7714	Yang, Tiannan,Dong, Mengmeng,Xue, Chuandong,et al. Coherent Chemical Variation Trends of the 55-25 Ma Magmatic Rocks in SE Tibet: N-S Direction Lithospheric Stretching of Eurasia during Early Stage of India-Eurasia Collision[J],2023,97(5).
APA	Yang, Tiannan,Dong, Mengmeng,Xue, Chuandong,Xin, Di,&Liang, Mingjuan.(2023).Coherent Chemical Variation Trends of the 55-25 Ma Magmatic Rocks in SE Tibet: N-S Direction Lithospheric Stretching of Eurasia during Early Stage of India-Eurasia Collision.ACTA GEOLOGICA SINICA-ENGLISH EDITION,97(5).
MLA	Yang, Tiannan,et al."Coherent Chemical Variation Trends of the 55-25 Ma Magmatic Rocks in SE Tibet: N-S Direction Lithospheric Stretching of Eurasia during Early Stage of India-Eurasia Collision".ACTA GEOLOGICA SINICA-ENGLISH EDITION 97.5(2023).