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Origin of submarine canyon-channel systems along the middle segment of west mariana ridge,Philippine Sea

Journal of Oceanology and Limnology 2023年第3期41卷 881-896页

作者： Guangxu ZHANG Shuang LI Wei LI Xiujuan WANG Duanxin CHEN Dongdong DONG Wenlong WANG Key Laboratory of Marine Geology and Environment&Center for Ocean Mega-Science Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources National Laboratory for Marine Science and TechnologyQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Lab of Submarine Geosciences and Prospecting TechniquesMOE and College of Marine GeosciencesOcean University of ChinaQingdao 266100China

Submarine canyon-channel systems have been documented in the Parece Vela Basin,west mariana ridge;however,the mechanism of the formation and controlling factors remain poorly *** on high-resolution multibeam bathymetric data and two-dimensional(2D)seismic profiles,we identified and mapped the submarine canyon-channel system along the middle segment of west mariana ridge in the Philippine *** submarine canyon-channels show a main W-E orientation at depth of 2000–4500 *** are approximately 72–128 km in length and 1.3–15 km in width,and their canyon heads are adjacent to the seamounts with several *** upper reaches of submarine canyon-channels are characterized by deeply incised,narrow,V-shaped thalwegs,suggesting the powerful erosion of gravity *** distinguished sediment waves are suggested to be resulted from the interaction of turbidity currents and *** observations demonstrate that gravity flows originated from the collapses of seamount flanks plays a vital role in developing the submarine canyonchannel system along the west mariana *** work provides better understanding of erosion,transport,and deposition of sediments from subducting ridges to deep-water basins,and also new insights into the origin and evolution of submarine canyon-channel systems along subducting ridges.

关键词： submarine canyon-channel system gravity flow subducting ridges west mariana ridge

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