Miocene and Pleistocene shoshonitic volcanic rocks in the Jingyuhu area,;north of the Qinghai-Tibet Plateau

	Miocene and Pleistocene shoshonitic volcanic rocks in the Jingyuhu area,;north of the Qinghai-Tibet Plateau
	Yang, JS; Wu, CL; Shi, RD; Li, HB; Xu, ZQ; Meng, FC
刊名	ACTA PETROLOGICA SINICA
	2002
卷号	18 期号:2 页码:161-176
关键词	Qinghai-Tibet plateau Hohxil Jingyuhu Shoshonite Potassic volcanic rock Cenozoic volcanism
ISSN号	1000-0569
英文摘要	Two periods, Miocene and Pleistocene, of shoshonitic volcanic rocks were recognized in the Jingyuhu area, northern Qinghai-Tibet plateau. The earlier one is intermediate trachyte series, and the later one is tephrite-basic trachyte series. The two series have different types of phenocryst, chemical composition, trace element pattern and ratio of isotopic element, but they show similar REE patterns. Isotopic characteristics suggest that these rocks were originated from EM II type of mantle, a kind of enriched mantle with the addition of recycled crustal material. The occurrence of the two periods and two series of volcanic rocks suggest that the different periods of Cenozoic volcanic activity on the plateau can be overlapped in space. The volcanic activities occurred along the giant sinistral strike-slip fault along the south margin of Kunlun Mountain, specifically constrained by the second-order faults to the north of the main fault. The deep-cut lithospheric faults here acted as a magma channel, and the occurrence of two periods of eruption represents the reactivity of the fault.
学科主题	火成岩岩石学
WOS关键词	MANTLE ; ND ; POSTCOLLISION ; LITHOSPHERE ; CONSTRAINTS ; PB
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000175687400004
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37534]
专题	中国地质科学院地质研究所
作者单位	Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China.
推荐引用方式 GB/T 7714	Yang, JS,Wu, CL,Shi, RD,et al. Miocene and Pleistocene shoshonitic volcanic rocks in the Jingyuhu area,;north of the Qinghai-Tibet Plateau[J]. ACTA PETROLOGICA SINICA,2002,18(2):161-176.
APA	Yang, JS,Wu, CL,Shi, RD,Li, HB,Xu, ZQ,&Meng, FC.(2002).Miocene and Pleistocene shoshonitic volcanic rocks in the Jingyuhu area,;north of the Qinghai-Tibet Plateau.ACTA PETROLOGICA SINICA,18(2),161-176.
MLA	Yang, JS,et al."Miocene and Pleistocene shoshonitic volcanic rocks in the Jingyuhu area,;north of the Qinghai-Tibet Plateau".ACTA PETROLOGICA SINICA 18.2(2002):161-176.