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Noble gas isotopic systematics of Fe-Ti-V oxide ore-related mafic-ultramafic layered intrusions in the Panxi area, China: The role of recycled oceanic crust in their petrogenesis

文献类型：期刊论文

作者Hou, Tong1; Zhang, Zhaochong1; Ye, Xianren2; Encarnacion, John3; Reichow, Marc K.4
刊名GEOCHIMICA ET COSMOCHIMICA ACTA
出版日期2011-11-15
卷号75期号:22页码:6727-6741
ISSN号0016-7037
DOI10.1016/j.gca.2011.09.003
文献子类Article
英文摘要Olivine and clinopyroxene grains have been separated from four large Fe-Ti-V oxide ore-bearing intrusions (Panzhihua, Hongge, Baima and Taihe) in the Panxi area, Emeishan large igneous province, Southwest China, for He and Ar isotope studies. The samples examined revealed extremely low He-3/He-4 ratios (0.078-4.34 Ra with the mean value 0.78 Ra) for gases extracted by stepwise heating. This feature, combined with low Ar-40/Ar-36 ratios can be interpreted as due to addition of subduction-related fluids and melts that had been stored in the lithospheric mantle for long periods. Considering the regional geologic history, such addition can be attributed to the paleo subduction that occurred along the western margin of the Yangtze Block during the Neoproterozoic. The subducted oceanic crust beneath the Panxi area underwent eclogite-facies metamorphism and subsequent exhumation. The infiltration of subduction-related melts and fluids into the lithospheric mantle led to enriched isotopic signatures from that of the slightly depleted asthenopheric mantle which has been suggested by the Sr, Nd and Pb isotopic data of the Emeishan basalts and picrites. In addition, considerable amounts of eclogitic melts produced by partial melting of eclogite-facies oceanic crust extensively contaminated the lithospheric mantle. During the late Permian, partial melting of an upwelling mantle plume that contained an eclogite or pyroxenite component generated the parental Fe-rich magma that supplied the ore-bearing intrusions. The combination of these factors may have been the crucial reason that many world-class Fe-Ti-V oxides deposits are clustered in the Panxi area. (C) 2011 Elsevier Ltd. All rights reserved.
WOS关键词LARGE IGNEOUS PROVINCE ; FLOOD-BASALT PROVINCE ; EMEISHAN MANTLE PLUME ; MID-ATLANTIC RIDGE ; MAJOR-ELEMENT HETEROGENEITY ; PERMIAN-TRIASSIC BOUNDARY ; BACK-ARC BASIN ; SW CHINA ; SOUTH CHINA ; GEOCHEMICAL EVIDENCE
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000296579600001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Special Fund for Scientific Research in the Public Interest(200911007-25) ; Special Fund for Scientific Research in the Public Interest(200911007-25) ; National Nature Science Foundation of China(40925006) ; National Nature Science Foundation of China(40925006) ; 973 Project(2012CB416800 ; 973 Project(2012CB416800 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 111 Project(B07011) ; 111 Project(B07011) ; PCSIRT ; PCSIRT ; 2009CB421002) ; 2009CB421002) ; Special Fund for Scientific Research in the Public Interest(200911007-25) ; Special Fund for Scientific Research in the Public Interest(200911007-25) ; National Nature Science Foundation of China(40925006) ; National Nature Science Foundation of China(40925006) ; 973 Project(2012CB416800 ; 973 Project(2012CB416800 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 111 Project(B07011) ; 111 Project(B07011) ; PCSIRT ; PCSIRT ; 2009CB421002) ; 2009CB421002) ; Special Fund for Scientific Research in the Public Interest(200911007-25) ; Special Fund for Scientific Research in the Public Interest(200911007-25) ; National Nature Science Foundation of China(40925006) ; National Nature Science Foundation of China(40925006) ; 973 Project(2012CB416800 ; 973 Project(2012CB416800 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 111 Project(B07011) ; 111 Project(B07011) ; PCSIRT ; PCSIRT ; 2009CB421002) ; 2009CB421002) ; Special Fund for Scientific Research in the Public Interest(200911007-25) ; Special Fund for Scientific Research in the Public Interest(200911007-25) ; National Nature Science Foundation of China(40925006) ; National Nature Science Foundation of China(40925006) ; 973 Project(2012CB416800 ; 973 Project(2012CB416800 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 111 Project(B07011) ; 111 Project(B07011) ; PCSIRT ; PCSIRT ; 2009CB421002) ; 2009CB421002)
源URL[http://ir.iggcas.ac.cn/handle/132A11/73786]  
专题中国科学院地质与地球物理研究所
通讯作者Zhang, Zhaochong
作者单位1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Key Lab Petr Resources Res, Inst Geol & Geophys, Lanzhou 730000, Peoples R China
3.St Louis Univ, Dept Earth & Atmospher Sci, St Louis, MO 63108 USA
4.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England
推荐引用方式
GB/T 7714		 Hou, Tong,Zhang, Zhaochong,Ye, Xianren,et al. Noble gas isotopic systematics of Fe-Ti-V oxide ore-related mafic-ultramafic layered intrusions in the Panxi area, China: The role of recycled oceanic crust in their petrogenesis[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2011,75(22):6727-6741.
APA Hou, Tong,Zhang, Zhaochong,Ye, Xianren,Encarnacion, John,&Reichow, Marc K..(2011).Noble gas isotopic systematics of Fe-Ti-V oxide ore-related mafic-ultramafic layered intrusions in the Panxi area, China: The role of recycled oceanic crust in their petrogenesis.GEOCHIMICA ET COSMOCHIMICA ACTA,75(22),6727-6741.
MLA Hou, Tong,et al."Noble gas isotopic systematics of Fe-Ti-V oxide ore-related mafic-ultramafic layered intrusions in the Panxi area, China: The role of recycled oceanic crust in their petrogenesis".GEOCHIMICA ET COSMOCHIMICA ACTA 75.22(2011):6727-6741.

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来源：地质与地球物理研究所

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