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Mesozoic Deformation and Its Geological Significance in the Southern Margin of the South China Sea

作者:ZHU; Rongwei; LIU; Hailing; YAO; Yongj...southerncontinentalmarginofthesouthchinaseamesozoicdeformationstructurestructuralrestoration

摘要:The pre-Eocene history of the region around the present South China Sea is not well known. New multi-channel seismic profiles provide valuable insights into the probable Mesozoic history of this region. Detailed structural and stratigraphic interpretations of the multi-channel seismic profiles, calibrated with relevant drilling and dredging data, show major Mesozoic structural features. A structural restoration was done to remove the Cenozoic tectonic influence and calculate the Mesozoic tectonic compression ratios. The results indicate that two groups of compressive stress with diametrically opposite orientations, S(S)E– N(N)W and N(N)W–S(S)E, were active during the Mesozoic. The compression ratio values gradually decrease from north to south and from west to east in each stress orientation. The phenomena may be related to the opening of the proto-South China Sea(then located in south of the Nansha block) and the rate at which the Nansha block drifted northward in the late Jurassic to late Cretaceous. The Nansha block drifted northward until it collided and sutured with the southern China margin. The opening of the present South China Sea may be related to this suture zone, which was a tectonic zone of weakness.

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中国海洋大学学报·自然科学版

《中国海洋大学学报·自然科学版》(CN:37-1414/P)是一本有较高学术价值的大型月刊,自创刊以来,选题新奇而不失报道广度,服务大众而不失理论高度。颇受业界和广大读者的关注和好评。 《中国海洋大学学报·自然科学版》主要刊登理、工、农(水产)、医(药)等涉海相关领域中具有原创性的科技论文。坚持为理论研究、高技术开发、成果转化等专家学者、科技工作者服务,以理论研究和知识创新为主导,兼顾应用于开发等国内、国际的最新研究成果。

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