Chronology and geochemistry of mylonitic quartz diorites in the Yushu;melange, central Tibet

	Chronology and geochemistry of mylonitic quartz diorites in the Yushu;melange, central Tibet
	Zhnag HongRui 5; Yang TianNan ; Hou ZengQian ; Song YuCai ; Cheng XianFeng 1; Ding Yan 2; Chen Wen ; Hou KeJun 3
刊名	ACTA PETROLOGICA SINICA
	2013
卷号	29 期号:11 页码:3871-3882
关键词	Zircon U-Pb age Biotite Ar-40/Ar-39 age Geochemistry Mylonitic quartz diorites Yushu melange Paleo-tethyan
ISSN号	1000-0569
英文摘要	The tectonic evolution model of the west segment of the Jinshajiang Paleo-tethyan are hotly. debated. Located in the northern margin of the eastern Qiang-tang block (EQ), the Yushu melange is very important for understanding the Paleo-tethyan evolution. Zircon U-Pb and biotite Ar-40/Ar-39 dating document a Late Triassic generation and deformation time for the Yushu quartz diorite from the northern margin of EQ. The pluton has elongated shape, deformed fabric, with some granodiorite vein intrusive. The quartz diorites exhibit strong enrichment of large ion lithophile element and light rare earth element, depletion in high field strength element, and have enriched isotopic compositions with (Sr-87/Sr-86); ranging from 0.70783 to 0.71064 and epsilon(Nd) (t) from -3.6 to -5.9. These features suggest that they were derived from mafic lower crust; the Yushu mylonitic pluton likely represents magmatic expression of subducting Paleo-Tethyan slab and deformed during the collision of EQ with Eurasia continent in Triassic.
学科主题	火成岩岩石学
WOS关键词	HIGH-MG ANDESITES ; GARZE FOLD BELT ; LA-ICP-MS ; TECTONIC EVOLUTION ; TRIASSIC GRANITOIDS ; QIANGTANG BLOCK ; PLATEAU ; PETROGENESIS ; ARC ; GEOCHRONOLOGY
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000328441300018
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40168]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China. 2.Yunnan Land & Resources Vocat Coll, Kunming 650217, Peoples R China. 3.Shandong Gold Geol & Mineral Resources Co, Laizhou 261400, Peoples R China. 4.Chinese Acad Geol Sci, Inst Mineral Resource, Beijing 100037, Peoples R China. 5.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Zhnag HongRui,Yang TianNan,Hou ZengQian,et al. Chronology and geochemistry of mylonitic quartz diorites in the Yushu;melange, central Tibet[J]. ACTA PETROLOGICA SINICA,2013,29(11):3871-3882.
APA	Zhnag HongRui.,Yang TianNan.,Hou ZengQian.,Song YuCai.,Cheng XianFeng.,...&Hou KeJun.(2013).Chronology and geochemistry of mylonitic quartz diorites in the Yushu;melange, central Tibet.ACTA PETROLOGICA SINICA,29(11),3871-3882.
MLA	Zhnag HongRui,et al."Chronology and geochemistry of mylonitic quartz diorites in the Yushu;melange, central Tibet".ACTA PETROLOGICA SINICA 29.11(2013):3871-3882.