Ages and geological significance of the dark dykes emplaced in the Karamay pluton and adjacent area, in western Junggar, Xinjiang, NW China  Evidence form LA-ICP-MS zircon chronology and Ar-Ar amphibole chronology

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	Ages and geological significance of the dark dykes emplaced in the Karamay pluton and adjacent area, in western Junggar, Xinjiang, NW China Evidence form LA-ICP-MS zircon chronology and Ar-Ar amphibole chronology
	Feng, QW (Feng QianWen); Li, JY (Li JinYi); Liu, JF (Liu JianFeng); Song, B (Song Biao); Wang, YB (Wang YanBin); Chen, W (Chen Wen); Zhang, Y (Zhang Yan)
刊名	ACTA PETROLOGICA SINICA
	2012
卷号	28 期号:7 页码:2158-2170
关键词	Dykes Zircon U-Pb chronology Amphibole Ar-Ar chronology Karamay pluton Western Junggar
ISSN号	1000-0569
英文摘要	There are large number of dark diorite porphyrite dykes emplaced in the Karamay pluton and its adjacent area, western Junggar, Xinjiang, NW China. They are considered to be formed by magma filling into the existing fractures, which can be briefly classified into three groups with different strikes. The LA-ICP-MS U-Pb dating for zircons from a diorite porphyrite dyke sample yields Pb-206/U-238 age of 303.1 +/- 1.2Ma. The Ar-Ar plateau age and inverse isochron diagram age of amphiboles from the same sample, are 312.1 +/- 2.8Ma(1120 similar to 1400 degrees C) and 313.6 +/- 6.9Ma respectively. The zircon Pb-206/U-238 age of host rock is determined, by LA-ICP-MS zircon U-Pb dating, as 319.0 +/- 1.0Ma, and zircon Pb-206/U-238 age of a granite porphyry vein is 315.3 +/- 1.0Ma. These chronology data show that the formation of the dykes in this area is not Permian, but Late Carboniferous, and that before filling of those dykes, the granitic magma intrusion occurred in western Junggar area, resulting in Karamay pluton and granite porphyry veins. The above dating data of the dykes and the host rock imply that the fractures, filled by the dykes, occurred from 315Ma to 303Ma. This study gives the new temporal constraint for further research in both Late Paleozoic geodynamical environment and magmatic intrusion of western Junggar, Xinjiang, NW China.
学科主题	火成岩岩石学
WOS关键词	NORTHERN XINJIANG ; OPHIOLITIC MELANGE ; MAFIC DYKES ; SUBDUCTION ; BASIN ; GEOCHRONOLOGY ; TECTONICS ; FRAMEWORK ; REGIONS ; CRUST
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000306631600017
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39803]
专题	中国地质调查局
作者单位	Beijing SHRIMP Ctr, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Feng, QW ,Li, JY ,Liu, JF ,et al. Ages and geological significance of the dark dykes emplaced in the Karamay pluton and adjacent area, in western Junggar, Xinjiang, NW China Evidence form LA-ICP-MS zircon chronology and Ar-Ar amphibole chronology[J]. ACTA PETROLOGICA SINICA,2012,28(7):2158-2170.
APA	Feng, QW .,Li, JY .,Liu, JF .,Song, B .,Wang, YB .,...&Zhang, Y .(2012).Ages and geological significance of the dark dykes emplaced in the Karamay pluton and adjacent area, in western Junggar, Xinjiang, NW China Evidence form LA-ICP-MS zircon chronology and Ar-Ar amphibole chronology.ACTA PETROLOGICA SINICA,28(7),2158-2170.
MLA	Feng, QW ,et al."Ages and geological significance of the dark dykes emplaced in the Karamay pluton and adjacent area, in western Junggar, Xinjiang, NW China Evidence form LA-ICP-MS zircon chronology and Ar-Ar amphibole chronology".ACTA PETROLOGICA SINICA 28.7(2012):2158-2170.