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Reconstructing the architecture of the late Mesozoic Southeast China continental margin, by Dr. Roderick J. Sewell
April 22, 2017 @ 10:00 AM - 10:30 AM UTC+0
Dr. Roderick J. Sewell
(Hong Kong Geological Survey, GEO, CEDD, HKSAR)
Rod Sewell has been a member of the Hong Kong Geological Survey for over 27 years. Following completion of his PhD on an extinct volcano in New Zealand, he worked for the New Zealand Geological Survey studying volcanic geology and tectonics, with excursions to the Antarctic and USA. He has coauthored several books, papers, and maps on the geology of Hong Kong, New Zealand and Antarctica. Rod is Chief Training Geologist in the GEO/CEDD and is an Honorary Professor in the Department of Earth Sciences at the University of Hong Kong. He currently heads the Hong Kong Geological Survey, GEO/CEDD.
About the talk
A variety of tectonic models have been proposed for the origin of Jurassic (199-145 Ma) magmatism in SE China. These include both a mature continental arc setting and a within-plate setting. Among these models, subduction of the Palaeo-pacific plate along a convergent margin has the most support. However, not much is known about the structure of the convergent margin complex. Here, we use precisely-dated, well-studied, tectonostratigraphic terranes in Hong Kong, together with geochemistry and geochronology of granitic rocks, to help reconstruct the architecture of the Southeast China convergent margin in the late Middle Jurassic.