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It is widely accepted that the North China Craton (NCC) was finally formed by collision of the Eastern and the Western Blocks along the Trans-North China Orogen (TNCO) at approximately 1.85Ga. The continent–continent collision along the TNCO was partly defined by metamorphism of high pressure mafic granulites with clockwise P–T paths. However, the continental subduction process has not been well recorded...
The high pressure (HP) metamorphic age has been dated to HP rocks from the Sanggan area, North China craton. We have got garnet+whole rock isochron ages of (1 842±38) Ma for HP granulite, and (1 856 ±26) Ma for HP amphibolite. The Sm-Nd whole rock isochron of HP granulites give out an age of (1870±150) Ma with Nd depleted mantle model age of (2402–2482) Ma. Considering the Nd isotope homogenization...
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