Geochemical and isotopic composition and inherited zircon ages as evidence for lower crustal origin of two Variscan S-type granites in the NW Bohemian massif

作     者：W.Siebel M.Satir 

作者单位：Institut für GeowissenschaftenUniversitt TübingenWilhelmstraβe 5672074 TübingenGermany 

会议名称：《中国科学院地质与地球物理研究所2003学术年会》

会议日期：2003年

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

基　　金：supported by the Deutsche Forschungsgemeinschaft(DFG) to W.S.(Si-718/2-1) 

关 键 词：Moldanubian Nd-Sr isotopes S-type granite Variscan Zircon age 

摘      要：Geochemical and Nd-Sr isotopic compositions and U-Pb zircon ages of two Variscan granites(Neunburg and Oberviechtach) from southern Oberpfalz,NW Bohemian massif,have been investigated in order to place constraints on their formation and on the crustal reworking. Both granites exhibit similar mineralogical,chemical and isotopic *** have peraluminous compositions(A/CNK ratios 1.2-1.3) and display high K