Concept,model,formation and disordered variation of Ocean Plate Stratigraphy
Xu Shu-Mei1,2,3, Kong Jia-Hao1,2, Li San-Zhong1,2,3, Shu Peng-Cheng1,2, Ma Hui-Lei1,2, Cui Hui-Qi1,2
1 Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education, Ocean University of China, Shandong Qingdao 266100,China; 2 College of Marine Geosciences,Ocean University of China,Shandong Qingdao 266100,China; 3 Institute of Advanced Oceanography/Frontiers Science Center for Deep Ocean Multispheres and Earth System,Shandong Qingdao 266100,China
Abstract：This paper mainly focuses on the concept,model,formation and disordered variation of the Ocean Plate Stratigraphy(OPS). The sedimentary records of the ancient ocean floor after subduction and collision include the orogenic mélange and continental margin accretionary complexes,which can be reconstructed by micropaleontology and isotope chronology. The reconstructed stratigraphy from the mélange and accretion complex is here referred to as “Ocean Plate Stratigraphy”. The basic composition of OPS reconstructed from the mélange and accretive complexes of orogenic belts is similar,but the composition and types of OPS are different due to the different magma background of oceanic lithosphere. The paper introduces how to re-establish OPS from the accretive orogenic belt undergoing subduction and collision based on different types of oceanic plate strata. The purpose of introducing the concept of OPS is to re-establish the stratigraphic units of the vanished ocean basin and marginal sea basin. It will play a positive role in promoting the stratigraphic analysis of orogenic belt,in restoring the orogenic belt tectonic paleogeography,and in studying the paleogeography during major tectonic changes and plate reconstruction.
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