Post-collisional Southeastern Beishan granites: Geochemistry, geochronology, Sr–Nd–Hf isotopes and their implications for tectonic evolution
作者: Wen ZhangTairan WuRongguo ZhengJicheng FengHongling LuoYuankai HeCao Xu
作者单位: 1Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China
2Department of Geological Sciences, Stockholm University, SE-106 91 Stockholm, Sweden
刊名: Journal of Asian Earth Sciences, 2012, Vol.58 , pp.51-63
来源数据库: Elsevier Journal
DOI: 10.1016/j.jseaes.2012.07.004
关键词: Post-collisionGraniteBeishanCAOBPaleozoicLA-ICP-MSGeochemistry
英文摘要: Abstract(#br)Bandaoshan granites are exposed in the Southeastern Beishan area, in the central part of the Central Asia Orogenic Belt (CAOB). LA-ICP-MS U–Pb zircon dating indicates that Bandaoshan granites were emplaced into Precambrian basement at 285±4Ma and their geochemistry indicates that they are alkali-rich potassium-high granites. Initial ε Nd values (−4.3 to −2.7) and ε Hf values (−2.7 to +0.7) suggest that Bandaoshan granites were derived from mantle-derived melt and an upper continental crustal or sedimentary component. The latter plays a significant role in their genesis. In combination with regional geology, the Early Permian Bandaoshan pluton is interpreted to form in a post-collisional environment. In the Southeastern...
全文获取路径: Elsevier  (合作)
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影响因子:2.379 (2012)

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