Seminar

A major advancement in understanding the Paleoproterozoic amalgamation of the North China Craton was made following recognition of three major Paleoproterozoic tectonic belts, namely the Khondalite Belt, Jiao-Liao-Ji Belt and Trans-North China Orogen in the western, eastern and central parts of the craton, respectively. This seminar will summarize available data demonstrating that the Khondalite Belt and Trans-North China Orogen are typical Himalayan-type continent-continent collisional belts, of the former resulted from collision between the Yinshan and Ordos Blocks to form the Western Block at about 1.95 Ga, which then amalgamated with the Eastern Block form the Trans-North China Orogen at about 1.85 Ga, leading to the assembly of the North China Craton. The Jiao-Liao-Ji Belt is interpreted as a rifting-and-collision belt within the Eastern Block which underwent rifting to form an incipient oceanic basin that was closed upon itself through subduction and collision at ~1.9 Ga. These Paleoproterozoic continent-continent collisional events were coincident with global-scale 2.0-1.8 Ga collisional events that led to the assembly of the Paleo-Mesoproterozoic Columbia (Nuna) supercontinent.

Zoom: https://tinyurl.com/y4rstd7s 
(Meeting ID: 935 9352 4975

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