Seminar

The Eastern Block (EB) is composed mainly of high-grade gneissic complexes and low-grade greenstone terrenes. Previous research has confirmed the EB went through a significant tectonic event at about 2.5G. TTG gneisses were extensively formed in this period. The formation mechanism of the Neoarchean TTG, which is inevitably connected to the Archean tectonic background, has been hotly debated. The metamorphism following the ~2.5Ga magma events is another key for the interpretation of the tectonic revolution and thermal history of the EB in the Neoarchean. Therefore, it is necessary to carry out extensive metamorphic investigations on various metamorphic complexes in the EB of the North China Craton (NCC). As one of the largest metamorphic complexes in the EB and located in its northwestern boundary zone, the Jianping Complex (JPC) is part of the granulite facies belt of the NCC and thus suitable for reconstructing the metamorphic evolution. Combining the studies of TTG gneisses and intermediate to mafic granulites, we hope to rebuild the revolution history of the JPC and discuss the tectonic environment of the EB and the NCC in the Neoarchean.

Additional information: Ms. XU Nanqing, u3006995@connect.hku.hk