摘要
天堂寨片麻状花岗岩,多数文献将其归属前寒武纪混合花岗岩。笔者认为是岩浆冷凝结晶产物,属IU型花岗岩。其侵位时代为早白垩世。锆石一致曲线年龄为124.7Ma。岩体侵位以后,大别山地区的抬升速度不很快,平均每年抬升0.1mm。
Tiantangzhai gneissis granite massif which is considered a Pre-Cambrian migmatitic granite by most references, in the authors' opinion, is product of crystallization of magma and belongs to I'u-type granite. Its emplacement age was Early Cretaceous.The concordant ages of 124.7 Ma for the zircons have been obtained. Since the emplacing of the granite, theuplifted speed of Dabieshan region is not very quick. An average, there is 0.1mm per year.
出处
《岩石矿物学杂志》
CAS
CSCD
1990年第1期31-36,T002,共7页
Acta Petrologica et Mineralogica
