FN Archimer Export Format
PT J
TI Clay mineral evolution in the central Okinawa Trough since 28 ka: Implications for sediment provenance and paleoenvironmental change
BT 
AF DOU, Yanguang
   YANG, Shouye
   LIU, Zhenxia
   CLIFT, Peter D.
   YU, Hua
   BERNE, Serge
   SHI, Xuefa
AS 1:1;2:1,2;3:3;4:4;5:5;6:6;7:3;
FF 1:;2:;3:;4:;5:;6:PDG-DOP-DCB-GM-LES;7:;
C1 Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China.
   Tongji Univ, MOE, Key Lab Yangtze River Water Environm, Shanghai 200092, Peoples R China.
   State Ocean Adm, Inst Oceanog 1, Qingdao 266071, Peoples R China.
   Univ Aberdeen, Sch Geosci, Aberdeen AB24 3UE, Scotland.
   Rice Univ, Dept Earth Sci, Houston, TX 77005 USA.
   DRO GM, IFREMER, F-29280 Plouzane, France.
C2 UNIV TONGJI, CHINA
   UNIV TONGJI, CHINA
   STATE OCEAN ADM, CHINA
   UNIV ABERDEEN, UK
   UNIV RICE, USA
   IFREMER, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LES
IN WOS Ifremer jusqu'en 2018
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 2.39
TC 110
UR https://archimer.ifremer.fr/doc/00002/11367/7977.pdf
LA English
DT Article
CR DONG-HAI
BO L'Atalante
DE ;Clay mineral;Sediment;Provenance;East China Sea;Okinawa Trough
AB The Okinawa Trough is a natural laboratory for the study of later Quaternary land-ocean interaction and paleoenvironmental changes. In this study we reconstruct the evolution of clay mineral assemblages in Core DGKS9604 retrieved from the central Okinawa Trough. Illite dominates the clay mineral compositions, with average contents above 60%. Clay mineral evolution since 28 ka is closely related to changes in sediment provenance and paleoenvironment. Sea level rise and the strength of the Kuroshio Current control the dispersal and deposition of clays on the East China Sea shelf and in the Okinawa Trough, and thus, determine the clay mineral compositions in the core sediments. During the late last glacial period (28.0-14.0 ka), the paleo-Changjiang River mouth was situated at the shelf edge close to the central Okinawa Trough and thus, together with the outer shelf, supplied large volumes of terrigenous sediments directly into the trough. From 14.0 to 8.4 ka influence from the Changjiang decreased while the mid-outer shelf of the East China Sea became the dominant sediment source to the central Okinawa Trough as sea level rose and the Changjiang river mouth migrated west. Strong sediment reworking and erosion at the shelf edge at 15-13 ka significantly increased the lateral transport of fine-grained shelf sediments to the central Okinawa Trough. Since ca. 8.4 ka clays from Taiwan have dominated the sediment flux to the site, coinciding with the re-entry of the Kuroshio Current into the trough. The increasing influence of the Changjiang-sourced sediments since 1.5 ka was probably related to the weakening of the Kuroshio Current and/or a higher river flux. (C) 2010 Elsevier B.V. All rights reserved.
PY 2010
PD MAR
SO Palaeogeography, Palaeoclimatology, Palaeoecology
SN 0031-0182
PU Elsevier
VL 288
IS 1-4
UT 000276667200010
BP 108
EP 117
DI 10.1016/j.palaeo.2010.01.040
ID 11367
ER

EF