Distinct control mechanism of fine-grained sediments from Yellow River and Kyushu supply in the northern Okinawa Trough since the last glacial
|Author(s)||Zhao Debo1, 2, Wan Shiming1, 3, 4, Toucanne Samuel5, Clift Peter D.6, Tada Ryuji7, Revillon Sidonie8, Kubota Yoshimi9, Zheng Xufeng10, Yu Zhaojie11, Huang Jie1, Jiang Hanchao12, Xu Zhaokai1, Shi Xuefa13, Li Anchun1|
|Affiliation(s)||1 : Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China.
2 : Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China.
3 : Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China.
4 : Univ Lorraine, CNRS, CRPG, Nancy, France.
5 : IFREMER, Unite Rech Geosci Marines, Lab Geophys & Enregistrements Sedimentaires, Plouzane, France.
6 : Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA.
7 : Univ Tokyo, Dept Earth & Planetary Sci, Tokyo, Japan.
8 : IUEM, SEDISOR UMR Domaines Ocean 6538, Pl Nicolas Copernic, Plouzane, France.
9 : Natl Museum Nat & Sci, Dept Geol, Ibaraki, Japan.
10 : Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China.
11 : Univ Paris Saclay, Univ Paris Sud, CNRS, Lab GEOsci Paris Sud GEOPS,UMR8148, Orsay, France.
12 : China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing, Peoples R China.
13 : SOA, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao, Peoples R China.
|Source||Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2017-08 , Vol. 18 , N. 8 , P. 2949-2969|
|WOS© Times Cited||29|
|Keyword(s)||Okinawa Trough, clay-sized sediments, Yellow River, Kyushu Island, sea-level change, Kuroshio Current, Tsushima Warm Current|
High-resolution multi-proxy records, including clay minerals and Sr-Nd-Pb isotopes of the clay-sized silicate fraction of sediments from IODP Site U1429 in the northern Okinawa Trough, provide reliable evidence for distinct control mechanism on fine-grained sediments input from the Yellow River and the southern Japanese Islands to the northern Okinawa Trough since 34 ka BP. Provenance analysis indicates that the sediments were mainly derived from the Yellow River and the island of Kyushu. Since the last glacial, clay-sized sediments transported from the Yellow River to the study site were strongly influenced by sea-level fluctuation. During low sea-level stage (∼34‒14 ka BP), the paleo-Yellow River mouth was positioned closer to the northern Okinawa Trough, favoring large fluvial discharge or even direct input of detrital sediments, which resulted about four times more flux of clay-sized sediments supply to the study area as during the relatively high sea-level stage (∼14‒0 ka BP). The input of Kyushu-derived clay-sized sediments to the study site was mainly controlled by the Kuroshio Current and Tsushima Warm Current intensity, with increased input in phase with weakened Kuroshio Current/Tsushima Warm Current. Our study suggests that the Kuroshio Current was very likely flowed into the Okinawa Trough and thus influenced the fine-grained sediment transport in the area throughout the last glacial and deglacial. During ∼34‒11 ka BP, the Kyushu clay-sized sediment input was mainly controlled by the Kuroshio Current. Since ∼11 ka BP, the occurrence of Tsushima Warm Current became important in influencing the Kyushu fine-grained sediment input to the northern Okinawa Trough.