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地球学报  2006 

浙江诸暨新元古代后造山铝质A型花岗岩的厘定

DOI: 10.3975/cagsb.2006.02.02

Keywords: Rodinia,后造山A型花岗岩,双峰式侵入岩,新元古代,浙江诸暨

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Abstract:

浙江诸暨道林山地区新元古代钾长花岗岩和辉绿岩组成双峰式侵入岩组合,本文讨论了它们的野外地质形态、年代学及岩石学等特征,确定钾长花岗岩属铝质花岗岩类;进一步的研究表明,该钾长花岗岩体属典型的后造山A型花岗岩(A2型/PA型),其单颗粒锆石UPb年龄为816Ma,这是华南地区迄今为止发现的最早的A型花岗岩,同时表明Rodinia超大陆已进入裂解高峰期。由于该裂解的主要时期在825Ma,我们推断华南为Rodinia超大陆裂解的中心。

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