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岩石学报 2001
U-Pb dating of zircon from gneiss at Nanhuang in East Anhui.
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Abstract:
There is a suboutcrop of amphibolite-facies TTG gneiss overlain by Neoproterozoic Zhangbaling Group at Nanhuang region in Jiashan, East Anhui. U-Pb dating was carried out for the single grains of zircon from the gneiss. The results show an age of 2493±19Ma for the upper intersect of discordia with concordia, which is interpreted to represent the formation age of the Nanhuang gneiss. In this regard, there is the Neoarchean rock in the northeastern margin of the Yangtze plate, doucmenting the widespread presence of Neoarchean to Paleoproterozoic basements in the northern margin of the Yangtze plate.
