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U-Pb baddeleyite ages, distribution and geochemistry of 925 Ma mafic dykes and 900 Ma sills in the North China craton: Evidence for a Neoproterozoic mantle plume

文献类型：期刊论文

作者Peng, Peng1; Bleeker, Wouter2; Ernst, Richard E.3; Soderlund, Ulf4; McNicoll, Vicki2
刊名LITHOS
出版日期2011-11-01
卷号127期号:1-2页码:210-221
关键词Baddeleyite U-Pb age North China craton Mafic dyke swarm Subcontinental lithospheric mantle Neoproterozoic Mantle plume
ISSN号0024-4937
DOI10.1016/j.lithos.2011.08.018
文献子类Article
英文摘要Numerous Neoproterozoic mafic dykes, referred to as the Dashigou swarm, are identified in the central and southeastern parts of the North China craton (NCC). They are 305-010 degrees trending dykes, with widths of similar to 10-100 m and exposed lengths of several to >10 km. Precise U-Pb isotope dilution thermal ionization mass spectrometry (ID-TIMS) measurements on baddeleyite grains separated from three dykes yield (207)Pb/(206)Pb average ages of 924.0 +/- 3.7 Ma (Dashigou dyke), 921.8 +/- 2.6 Ma (Yangjiaogou dyke) and 925.8 +/- 1.7 Ma (Taohuagou dyke). Baddeleyite grains from a late-stage pegmatite vein in the Dashigou dyke were analyzed by secondary ion mass spectrometry (SIMS) methods. These yield a (207)Pb/(206)Pb average age of 920.4 +/- 5.7 Ma. The Dashigou dyke swarm exhibits an overall radiating geometry (the overall fan angle is about 60 degrees), with a focal point located along the southern margin of the eastern NCC, where a large ca. 900 Ma sill swarm was previously recognized. The rift system hosting these slightly younger sills, named the Xu-Huai Rift System, could represent two breakup-parallel arms of a rift-rift-rift triple junction related to the initiation of the magma center that produced the Dashigou dykes. The sills have similar characteristics and could be cogenetic with the Dashigou dykes.
WOS关键词DAMIAO ANORTHOSITE COMPLEX ; ND ISOTOPIC CONSTRAINTS ; LARGE IGNEOUS PROVINCES ; SINO-KOREAN CRATON ; TECTONIC EVOLUTION ; INNER-MONGOLIA ; GEOLOGICAL SIGNIFICANCE ; OROGENIC BELT ; ORE-DEPOSIT ; ZIRCON GEOCHRONOLOGY
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000298070600014
出版者ELSEVIER SCIENCE BV
资助机构NSFC(41072146 ; NSFC(41072146 ; NSFC(41072146 ; NSFC(41072146 ; 41030316 ; 41030316 ; 41030316 ; 41030316 ; 40730315) ; 40730315) ; 40730315) ; 40730315) ; NSFC(41072146 ; NSFC(41072146 ; NSFC(41072146 ; NSFC(41072146 ; 41030316 ; 41030316 ; 41030316 ; 41030316 ; 40730315) ; 40730315) ; 40730315) ; 40730315) ; NSFC(41072146 ; NSFC(41072146 ; NSFC(41072146 ; NSFC(41072146 ; 41030316 ; 41030316 ; 41030316 ; 41030316 ; 40730315) ; 40730315) ; 40730315) ; 40730315) ; NSFC(41072146 ; NSFC(41072146 ; NSFC(41072146 ; NSFC(41072146 ; 41030316 ; 41030316 ; 41030316 ; 41030316 ; 40730315) ; 40730315) ; 40730315) ; 40730315)
源URL[http://ir.iggcas.ac.cn/handle/132A11/74338]  
专题中国科学院地质与地球物理研究所
通讯作者Peng, Peng
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Geol Survey Canada, Ottawa, ON K1A 0E9, Canada
3.Carleton Univ & Ernst Geosci, Dept Earth Sci, Ottawa, ON K1T 3Y2, Canada
4.Lund Univ, Dept Earth & Ecosyst Sci, SE-22362 Lund, Sweden
推荐引用方式
GB/T 7714		 Peng, Peng,Bleeker, Wouter,Ernst, Richard E.,et al. U-Pb baddeleyite ages, distribution and geochemistry of 925 Ma mafic dykes and 900 Ma sills in the North China craton: Evidence for a Neoproterozoic mantle plume[J]. LITHOS,2011,127(1-2):210-221.
APA Peng, Peng,Bleeker, Wouter,Ernst, Richard E.,Soderlund, Ulf,&McNicoll, Vicki.(2011).U-Pb baddeleyite ages, distribution and geochemistry of 925 Ma mafic dykes and 900 Ma sills in the North China craton: Evidence for a Neoproterozoic mantle plume.LITHOS,127(1-2),210-221.
MLA Peng, Peng,et al."U-Pb baddeleyite ages, distribution and geochemistry of 925 Ma mafic dykes and 900 Ma sills in the North China craton: Evidence for a Neoproterozoic mantle plume".LITHOS 127.1-2(2011):210-221.

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来源：地质与地球物理研究所

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