Geochronology and geochemistry of the Hekou Group in Sichuan Province,;SW China

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院矿产资源研究所

	Geochronology and geochemistry of the Hekou Group in Sichuan Province,;SW China
	Zhu, Zhimin 6; Hou, Kejun 1; Zhu, Kongyang 2,3,4; Tan, Hongqi
刊名	GEOCHEMICAL JOURNAL
	2013
卷号	47 期号:1 页码:51-64
关键词	zircon geochronology Hekou Group Yangtze Block supercontinent Columbia
ISSN号	0016-7002;EI 1880-5973
英文摘要	The Hekou Group, an outcrop at the west margin of the Yangtze Block, consists of volcanic and sedimentary rocks of sodic lava, sodic pyroclastic rocks, coarse to fine-grained siliciclastic rocks and carbonate rocks. These rocks have endured lower to upper greenschist-facies metamorphism. The Hekou Group represents the basement of the late Mesoproterozoic to early Neoproterozoic successions and hosts many Fe-Cu deposits. We conducted zircon U-Pb and Lu-Hf isotope analyses and whole-rock geochemistry analyses on igneous rocks from the Hekou Group to constrain the,,206 formation age of the Hekou Group and to understand the genesis of the Fe-Cu deposits. A zircon (207)pb/Pb-206 age of 1669 +/- 6 Ma was obtained from the tuffaceous schist of the Hekou Group and is considered to represent the deposition age of the group. Most rocks show negative high field strength element (HFSE, e.g., Ta, Nb, P, Zr, Hf and Ti) anomalies, light rare earth element (LREE) enrichment ((La/Yb)(n) = 12.10-109.01) and positive zircon epsilon(Hf)(t) values (+1.5 to +4.5). The geochemical and isotopic compositions indicate that the Hekou Group was formed in a back-arc basin at 1.7 Ga. Our study also implies that Paleoproterozoic tectonic evolution
学科主题	地层学与地史学
WOS关键词	NATURAL REFERENCE MATERIAL ; PLASMA-MASS SPECTROMETRY ; GA ; CONTINENTAL-CRUST ; U-PB GEOCHRONOLOGY ; HF ISOTOPE ; MESOPROTEROZOIC ; SUPERCONTINENT ; YANGTZE CRATON ; SOUTH CHINA ; TECTONIC EVOLUTION ; DEPLETED MANTLE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	GEOCHEMICAL SOC JAPAN
WOS记录号	WOS:000319309200004
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39970]
专题	中国地质科学院矿产资源研究所
作者单位	1.Chinese Acad Geol Sci, Inst Multipurpose Utilizat Mineral Resources, Chengdu 610041, Peoples R China. 2.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China. 3.Curtin Univ Technol, Inst Geosci Res TIGeR, Perth, WA 6845, Australia. 4.Curtin Univ Technol, Dept Appl Geol, ARC Ctr Excellence Core Crust Fluid Syst CCFS, Perth, WA 6845, Australia. 5.Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China. 6.中国地质调查局成都矿产综合利用研究所
推荐引用方式 GB/T 7714	Zhu, Zhimin,Hou, Kejun,Zhu, Kongyang,et al. Geochronology and geochemistry of the Hekou Group in Sichuan Province,;SW China[J]. GEOCHEMICAL JOURNAL,2013,47(1):51-64.
APA	Zhu, Zhimin,Hou, Kejun,Zhu, Kongyang,&Tan, Hongqi.(2013).Geochronology and geochemistry of the Hekou Group in Sichuan Province,;SW China.GEOCHEMICAL JOURNAL,47(1),51-64.
MLA	Zhu, Zhimin,et al."Geochronology and geochemistry of the Hekou Group in Sichuan Province,;SW China".GEOCHEMICAL JOURNAL 47.1(2013):51-64.