Zircon U-Pb geochronology of the Konggar granitoid and migmatite:;Constraints on the Oligo-Miocene tectono-thermal evolution of the;Xianshuihe fault zone, East Tibet

doi:10.1016/j.tecto.2013.07.007

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	Zircon U-Pb geochronology of the Konggar granitoid and migmatite:;Constraints on the Oligo-Miocene tectono-thermal evolution of the;Xianshuihe fault zone, East Tibet
	Li Hailong 1,2; Zhang Yueqiao 2
刊名	TECTONOPHYSICS
	2013
卷号	606;SI SI 页码:127-139
关键词	Zircon SHRIMP U-Pb dating Konggar massif Granitoid Migmatite Xianshuihe fault zone
ISSN号	0040-1951;EI 1879-3266
DOI	10.1016/j.tecto.2013.07.007
英文摘要	The Konggar massif, about 120 km long and 13 - 18 km wide, developed along the eastern segment of the Xianshuihe fault zone in East Tibet. It consists of two rock units: the Konggar granitic pluton and an elongate migmatite zone about 70 km long and 1 - 3 km wide. A metamorphic event was well recorded by the growth rims of zircons in the migmatite, their SHRIMP U-Pb dating of two rock samples taken from leucosome and melanosome yields respectively the ages of ca. 31.75 Ma and ca. 26.9 Ma. The SHRIMP U-Pb dating of zircons from two rock samples of the granitic pluton yields respectively the crystalline ages of 17.35 Ma and 14.4 Ma. These new data, together with the previously zircon U-Pb ages, the mica Ar-Ar dating ages and whole rock Rb-Sr age of the granitoid, allows to constraining the tectono-thermal evolution history of the Xianshuihe fault zone. It is inferred that this fault zone suffered along its eastern segment from high temperature metamorphism and migmatization during the Oligocene (in 32 - 27 Ma), which was followed by magma intrusion during the Miocene (in 18 - 12 Ma); sinistral shearing began to occur at about 10 Ma and continues to present-day. (C) 2013 Elsevier B.V. All rights reserved.
学科主题	火成岩岩石学
WOS关键词	SHAN-RED-RIVER ; SHEAR ZONE ; ION MICROPROBE ; WEST SICHUAN ; PLATEAU ; CHINA ; METAMORPHISM ; DEFORMATION ; GROWTH ; AGES
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000326420900010
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40219]
专题	中国地质科学院地质力学研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China. 2.China Univ Geosci, Sch Earth Sci & Mineral Resources, Beijing 100083, Peoples R China. 3.Minist Land & Resources, Key Lab Neotecton Movement & Geohazard, Beijing 100081, Peoples R China.
推荐引用方式 GB/T 7714	Li Hailong,Zhang Yueqiao. Zircon U-Pb geochronology of the Konggar granitoid and migmatite:;Constraints on the Oligo-Miocene tectono-thermal evolution of the;Xianshuihe fault zone, East Tibet[J]. TECTONOPHYSICS,2013,606;SI SI:127-139.
APA	Li Hailong,&Zhang Yueqiao.(2013).Zircon U-Pb geochronology of the Konggar granitoid and migmatite:;Constraints on the Oligo-Miocene tectono-thermal evolution of the;Xianshuihe fault zone, East Tibet.TECTONOPHYSICS,606;SI SI,127-139.
MLA	Li Hailong,et al."Zircon U-Pb geochronology of the Konggar granitoid and migmatite:;Constraints on the Oligo-Miocene tectono-thermal evolution of the;Xianshuihe fault zone, East Tibet".TECTONOPHYSICS 606;SI SI(2013):127-139.