Geochemical and SmNd isotopic study of Neoproterozoic ophiolites from southeastern China: petrogenesis and tectonic implications
作者: Xian-hua LiJian-xin ZhaoMalcolm T. McCullochGuo-qing ZhouFeng-ming Xing
作者单位: 1Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou 510640, PR China
2Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia
3Department of Geology, Australian National University, Canberra, ACT 0200, Australia
4Department of Earth Sciences, Nanjing University, Nanjing 210008, PR China
5Anhui Institute of Geological Sciences, Hefei 230001, PR China
刊名: Precambrian Research, 1997, Vol.81 (1), pp.129-144
来源数据库: Elsevier Journal
DOI: 10.1016/S0301-9268(96)00032-0
关键词: ophiolitesProterozoicChinaisotope geochemistry
原始语种摘要: Abstract(#br)Geochemical and SmNd isotopic data are presented for two Neoproterozoic ophiolite suites (∼970 Ma), which were tectonically emplaced into the Banxi Group and equivalent sequences of the Yangtze Block in the southern Anhui and northeastern Jiangxi Provinces, southeast China during the Neoproterozoic (0.9-0.8 Ga). The two ophiolite suites are similar to each other in terms of geochemical feeatures, with volcanics showing affinity to basalts forming in subduction-related environments, typical of the ‘supra-subduction zone (SSZ)’ ophiolites. However, the two suites differ significantly in their initial Nd isotopic compositions. The Jiangxi suite displays uniform initial ϵ Nd values of +5.5 ± 1.2, implying derivation from a depleted upper mantle source without significant...
全文获取路径: Elsevier  (合作)
影响因子:4.441 (2012)