<正>铌钽的地球化学行为特别是Nb/Ta比值的变化对于研究壳幔分异和大陆形成有非常重要的意义。岛弧玄武岩的Nb/Ta比值约在15~16(Munker et al.,2003;Munker et al.,2004),而全大陆地壳为12~13(Barth et al.,2000),因此在弧岩浆的结晶过...
Grant-in-Aid for Creative Scientific Research of Japan (Grant No. 19GS0211)
The average continental crust possesses intermediate compositions that typify arc magmatism and as a result it is believed to have been created at ancient convergent plate boundaries. One possible mechanism for interm...