中国科学院机构知识库网格系统: Timing of magmatism of the gneissic-granite plutons along North Qaidam margin and implications for Precambrian crustal accretions: zircon U-Pb dating and Hf isotope evidences.

Timing of magmatism of the gneissic-granite plutons along North Qaidam margin and implications for Precambrian crustal accretions: zircon U-Pb dating and Hf isotope evidences.

文献类型：期刊论文


作者	Chen, N. S.; Xia, X. P.; Li, X. Y.; Sun, M.; Xu, P.; Liu, X. M.; Wang, X. Y.; Wang, Q. Y.
刊名	ACTA PETROLOGICA SINICA
出版日期	2007-02-01
卷号	23 期号:2 页码:501-512
关键词	zircon U-Pb dating Hf isotope gneissic granitoids crustal accretion North Qaidam margin
ISSN号	1000-0569
文献子类	Article
英文摘要	Laser abration microprobe-inductively coupled plasma mass spectrometer (LA-ICP-MS) technique was applied for zircon dating of the Quanjihe granite in the east of Xitieshan and Shaliuhe granite in north Dulan County in the Qaidam margin;Laser abration microprobe-multi-collector-inductively coupled plasma mass spectrometer (MC-ICP-MS) technique was used to analysis Hf isotope compositions of zircon from the Shaliuhe granite. For the Quanjihe granite, a Concordia age of 910 +15/-17Ma was yielded for the magmatic zircons, Pb-207/Pb-206 age of 1351Ma for the detrital zircon and Ph-206/U-238 age of ca. 520Ma (Th-232/U-238 = 0.04) for the metamorphic zircon resulted from a metamorphic event prior to the HP UHP metamorphism. The zircon from the Shaiuhe granite often contains inherited detrital cores. Of the 21 measurements on 21 zircon grains, 10 measurements of magmatic zircon yielded Robust (Median) Pb-206/U-238 age of 920 +31/-17Ma, and the detrital zircon yielded Pb-207/Pb-206 age older than 1250Ma. Of the 30 measurements on 30 grains of zircon from the Shaliuhe granite, 27 measurements of magmatic zircon yielded Hf-176/Hf-177 = 0.282081 similar to 0.282222 with Robust( Median) average of 0.282178 + 0.000009/ -0.000015, Hf-1 = 0.28206 similar to 0.28220 with average of 0.28215 +/-0.00003, epsilon(Hf) = + 0.21 similar to -4.70 with Robust(Median) average of -1.53 + 0.41/-0.52, zircon Hf isotope crustal model age T-DM(C) = 1.59 similar to 1.75Ma, Robust (Median) average of 1.68 + 0.03/-0.02Ma. The other two of the rest detrital zircons have Hf-176/Hf-177 ratio of 0.281892 and 0.281792, Hf-1 = 0.28186 similar to 0.28178, epsilon(Hf) = - 11.83 similar to -14.82, T-DM(C) = 2.18 similar to 2.33Ga. It suggested that the magmatisin for the gneissic granites on the North Qaidarn margin should have a duration time from - 950Ma to similar to 910Ma, with peak age of similar to 920Ma. The magma of Shaliuhe granite and others with the same S-type peraluminous characteristics was generated from highly recycled upper crustal material-derived basemental suppracrustal rocks beneath the corroded Shaliuhe Group. The age of these materials should be constrained to be 1.4Ga similar to 1.7Ga and had recorded two crustal accretion events at similar to 1.7Ga and similar to 2.3 Ga for their provenances.
WOS关键词	SM-ND ; LU-HF ; GEOCHEMISTRY ; GEOCHRONOLOGY ; EVOLUTION ; SYSTEM ; MANTLE ; CHINA
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000245763200026
出版者	SCIENCE CHINA PRESS
源URL	[http://ir.iggcas.ac.cn/handle/132A11/68350]
专题	中国科学院地质与地球物理研究所
通讯作者	Chen, N. S.
作者单位	1.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China 2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.NW Univ Xian, Minist Educ, Key Lab Continental Geodynam, Xian 710069, Peoples R China 5.Sch Geol Survey Guangxi Prov, Nanning 530023, Peoples R China
推荐引用方式 GB/T 7714	Chen, N. S.,Xia, X. P.,Li, X. Y.,et al. Timing of magmatism of the gneissic-granite plutons along North Qaidam margin and implications for Precambrian crustal accretions: zircon U-Pb dating and Hf isotope evidences.[J]. ACTA PETROLOGICA SINICA,2007,23(2):501-512.
APA	Chen, N. S..,Xia, X. P..,Li, X. Y..,Sun, M..,Xu, P..,...&Wang, Q. Y..(2007).Timing of magmatism of the gneissic-granite plutons along North Qaidam margin and implications for Precambrian crustal accretions: zircon U-Pb dating and Hf isotope evidences..ACTA PETROLOGICA SINICA,23(2),501-512.
MLA	Chen, N. S.,et al."Timing of magmatism of the gneissic-granite plutons along North Qaidam margin and implications for Precambrian crustal accretions: zircon U-Pb dating and Hf isotope evidences.".ACTA PETROLOGICA SINICA 23.2(2007):501-512.

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来源：地质与地球物理研究所

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Timing of magmatism of the gneissic-granite plutons along North Qaidam margin and implications for Precambrian crustal accretions: zircon U-Pb dating and Hf isotope evidences.

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