Zircon SHRIMP U-Pb and in-situ Lu-Hf isotope analyses of a tuff from Western Beijing Evidence for missing Late Paleozoic arc volcano eruptions at the northern margin of the North China block

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	Zircon SHRIMP U-Pb and in-situ Lu-Hf isotope analyses of a tuff from Western Beijing Evidence for missing Late Paleozoic arc volcano eruptions at the northern margin of the North China block
	Zhang, SH (Zhang, Shuan-Hong); Zhao, Y (Zhao, Yue); Song, B (Song, Biao); Yang, YH (Yang, Yue-Heng)
刊名	GONDWANA RESEARCH
	2007
卷号	12 期号:1-2 页码:157-165
关键词	SHRIMP U-Pb dating LAM-ICPMS Lu-Hf volcanic tuff source area North China block (NCB) Central Asian Orogenic Belt (CAOB)
ISSN号	1342-937X
英文摘要	Zircon SHRIMP U-Pb and in-situ Lu-Hf isotopic analyses via laser ablation microprobe-inductively coupled plasma mass spectrometer (LAM-ICPMS) of a tuff within the Upper Paleozoic from Western Beijing were carried out to give new constraints on volcano eruption ages and source area of the tuffs within the North China block (NCB). SHRIMP U-Pb zircon dating of the tuff yielded a (206)Pb/(238)U weighted mean age of 296 +/- 4 Ma (95% confidence, MSWD=3.3), which is very similar to the emplacement age of the newly discovered Carboniferous calc-alkaline, I-type continental arc granitoid plutons in the Inner Mongolia Paleo-uplift (IMPU) on the northern margin of the NCB. In-situ Lu-Hf analysis results of most zircons from the tuff yielded initial (176)Hf/(177)Hf ratios from 0.282142 to 0.282284 and epsilon(Hf(t)) values from -15.9 to -10.7. These Lu-Hf isotopic compositions are very similar to those of the Late Carboniferous granitoids in the IMPU, but are very different to those of the Central Asian Orogenic Belt (CAOB). Together with the sedimentary and tectonic analyses results, we inferred that the source area of the tuffs within the NCB is the IMPU instead of the CAOB. Therefore, some are volcanoes once existed in the IMPU on northern margin of the NCB during the Late Carboniferous, but they were entirely eroded due to strong exhumation and erosion of the IMPU during the Late Carboniferous to Early Jurassic. (c) 2006 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
学科主题	火成岩岩石学
WOS关键词	INNER-MONGOLIA ; TECTONIC EVOLUTION ; DETRITAL ZIRCONS ; THRUST BELT ; CONSTRAINTS ; GROWTH ; CRUST ; AUSTRALIA ; HAFNIUM ; ORIGIN
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000248283100012
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38571]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Geomech, Key Lab Crustal Deformat & Proc, Beijing 100081, Peoples R China Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang, SH ,Zhao, Y ,Song, B ,et al. Zircon SHRIMP U-Pb and in-situ Lu-Hf isotope analyses of a tuff from Western Beijing Evidence for missing Late Paleozoic arc volcano eruptions at the northern margin of the North China block[J]. GONDWANA RESEARCH,2007,12(1-2):157-165.
APA	Zhang, SH ,Zhao, Y ,Song, B ,&Yang, YH .(2007).Zircon SHRIMP U-Pb and in-situ Lu-Hf isotope analyses of a tuff from Western Beijing Evidence for missing Late Paleozoic arc volcano eruptions at the northern margin of the North China block.GONDWANA RESEARCH,12(1-2),157-165.
MLA	Zhang, SH ,et al."Zircon SHRIMP U-Pb and in-situ Lu-Hf isotope analyses of a tuff from Western Beijing Evidence for missing Late Paleozoic arc volcano eruptions at the northern margin of the North China block".GONDWANA RESEARCH 12.1-2(2007):157-165.