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| Dou, Yanguang; Yang, Shouye; Liu, Zhenxia; Clift, Peter D.; Yu, Hua; Berne, Serge; Shi, Xuefa. |
| 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... |
| Tipo: Text |
Palavras-chave: Clay mineral; Sediment; Provenance; East China Sea; Okinawa Trough. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00002/11367/7977.pdf |
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| Dou, Yanguang; Yang, Shouye; Liu, Zhenxia; Clift, Peter D.; Shi, Xuefa; Yu, Hua; Berne, Serge. |
| The late Quaternary paleoceanography and paleoenvironment in the Okinawa Trough, East China Sea, have been well reconstructed over the last decade, while in contrast the provenance of terrigenous sediments that have accumulated there remains enigmatic. In this study, rare earth elements (REE) were used to investigate provenance changes in sediments from Core DGKS9604, taken from the middle Okinawa Trough. Discrimination plots based on REE fractionation parameters suggest that the cored sediments have variable provenances over the last 30 ka, with the lower part (ca. 31-8.2 ka) ultimately originating mostly from the Changjiang (Yangtze River) and the upper part (7.1-0 ka) primarily from Taiwan. During the Last Glacial Maximum and early deglacial period, sea... |
| Tipo: Text |
Palavras-chave: Sediment provenance; The Okinawa Trough; Kuroshio Current; Rare earth element. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00013/12459/9402.pdf |
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