Petrogenesis and tectonic implications of the iron-rich tholeiitic basalts in the Hutuo Group of the Wutai Mountains, Central Trans-North China Orogen

doi:10.1016/j.precamres.2015.10.008

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	Petrogenesis and tectonic implications of the iron-rich tholeiitic basalts in the Hutuo Group of the Wutai Mountains, Central Trans-North China Orogen
	Du, Lilin 1,2; Yang, Chonghui 1; Wyman, Derek A.2; Nutman, Allen P.3; Lu, Zenglong 1; Zhao, Lei 4; Wang, Wei 1; Song, Huixia 1; Wan, Yusheng 1,5; Ren, Liudong 1
刊名	PRECAMBRIAN RESEARCH
	2015-12-01
卷号	271 页码:225-242
关键词	The Hutuo Group Basalt Geochemistry Nd Isotope Rift-related Setting
DOI	10.1016/j.precamres.2015.10.008
文献子类	Article
英文摘要	The Hutuo Group, located in the Wutai Mountains area, is characteristic of Paleoproterozoic strata in the North China Craton, and plays an important role in establishing evolutionary processes in the TransNorth China Orogen. We present petrological observations along with geochemical and Nd isotopic data for basalts in the Qingshicun and Hebiancun Formations of the Hutuo Group. These basalts are enriched in TFe0 (11.97-18.01 wt.%), consistent with occurrences of iron-rich basalt world-wide. They also display relatively high MgO (4.95-12.25 wt.%), Ni (79-121 ppm) and Cr (37-101 ppm) and low in SiO2 (41.37-51.95 wt.%). Therefore, the iron-rich character of the Hutuo Group basalts originated with their parental magma rather than via shallow crustal fractionation at low oxygen fugacity, as inferred for many high iron basalts. The Hutuo Group basalts exhibit weak to moderate differentiation of light REE over heavy REE ((La/Lu)(cn) = 2.61-6.79) with minor or slight Eu anomalies (Eu/Eu*= 0.77-1.41), and also show the Nb and Ti troughs without obvious Zr and Hf anomalies. The epsilon(Nd)(t) values of the basalts range from -1.23 to +0.81 with T-DM of 2489-2664 Ma. The basalts most plausibly originated from the fertile subcontinental lithosphere mantle and, in the case of the Qingshicun Formation basalts, also underwent the crustal contamination. Basalts in the Hutuo Group also have the high Zr/Hf ratios, and present high Ti/V values of 24-55 and Zr/Y ratios ranging from 4.6 to 13.6, suggesting that they were emplaced in a within-plate setting. Considering the sedimentary associations and detrital fragments in the Hutuo and Gantaohe Groups, and bimodal magmatism along the Trans-North China Orogen, we propose that 2.2-2.0 Ga geological events within the orogen were rift-related, but did not result from subduction or island arc processes. (C) 2015 Elsevier B.V. All rights reserved.
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000366790900014
资助机构	National Natural Science Foundation of China(41172171) ; National Natural Science Foundation of China(41172171) ; China Scholarship Council(201409110015) ; China Scholarship Council(201409110015) ; China Geological Survey(12120114021501) ; China Geological Survey(12120114021501) ; National Commission on Stratigraphy of China(1212011120142) ; National Commission on Stratigraphy of China(1212011120142) ; National Natural Science Foundation of China(41172171) ; National Natural Science Foundation of China(41172171) ; China Scholarship Council(201409110015) ; China Scholarship Council(201409110015) ; China Geological Survey(12120114021501) ; China Geological Survey(12120114021501) ; National Commission on Stratigraphy of China(1212011120142) ; National Commission on Stratigraphy of China(1212011120142)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62136]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 2.Univ Sydney, Sch Geosci, Sydney, NSW 2006, Australia 3.Univ Wollongong, GeoQuEST Res Ctr, Sch Earth & Environm Sci, Wollongong, NSW 2522, Australia 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 5.Beijing SHRIMP Ctr, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Du, Lilin,Yang, Chonghui,Wyman, Derek A.,et al. Petrogenesis and tectonic implications of the iron-rich tholeiitic basalts in the Hutuo Group of the Wutai Mountains, Central Trans-North China Orogen[J]. PRECAMBRIAN RESEARCH,2015,271:225-242.
APA	Du, Lilin.,Yang, Chonghui.,Wyman, Derek A..,Nutman, Allen P..,Lu, Zenglong.,...&Geng, Yuansheng.(2015).Petrogenesis and tectonic implications of the iron-rich tholeiitic basalts in the Hutuo Group of the Wutai Mountains, Central Trans-North China Orogen.PRECAMBRIAN RESEARCH,271,225-242.
MLA	Du, Lilin,et al."Petrogenesis and tectonic implications of the iron-rich tholeiitic basalts in the Hutuo Group of the Wutai Mountains, Central Trans-North China Orogen".PRECAMBRIAN RESEARCH 271(2015):225-242.