- 责任者：Wang Jiaze (Key Laboratory of Marine Geology and Environment ; Institute of Oceanology ; Chinese Academy of Sciences ; Qingdao 266071 ; China) ; Li Anchun
- 刊名：Marine Geology & Quaternary Geology
- 出版年：2013
- 卷期：33(6)
- 关键词：海洋沉积物 ; marine sediments ; 古环境 ; paleoenvironment ; 冲绳海槽 ; Okinawa Trough
- 页码：p.105-114
- 图表：7 illus., 2 tables, 30 refs.
- 分类号：1400
- issnNo：ISSN0256-1492
- isbnNo：CN37-1117/P
libri" size="3">Based on the data of grain size and clay minerals coupled with precise AMS 14C dating , this pa- per deals with the provenance and paleoenvironment evolution of the Central Okinawa Trough for the last 17000a with the samples from the Core OKI04. The results indicate that the terrigenous sediments in the Central Okinawa Trough are mainly from the East China Sea carried by both the large rivers from East China libri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（libri" size="3">the Yangtz River and Yellow Riverlibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）libri" size="3"> and the small rivers from east and west Taiwan. The two ma-for provenances have different contribution to the study area in different periods. During the period of 17- 13.4 ka, sediments were mainly from the large rivers in East China libri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（libri" size="3">the Yangtz River and Yellow Riverlibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）libri" size="3"> and the small rivers in east and west Taiwan ; In the period of 13.4 -11.4 ka, sediments from west Tai- wan increased; in the period of 11.4-7.5 ka, the influence of the Yangtz river and Yellow river increased; during the period of 7.5-5.5 ka, the sediments in the study area were mainly affected by the Taiwan source; since 5.5 ka, the sediments were mainly from East Taiwan and Yangtz River. Our study also re- veals that Kaolinite was mainly from the large rivers in the Eeast China mainland. Besides, the environ- mentally sensitive grain-size populations suggests that the sediments were transported mainly in a suspen- ded manner. The transportation of the suspended sediments from the main rivers in East China is related to the ocean circulations driven by the winter monsoon. In this study, kaolinite content is used as the indica- tor of the winter monsoonlibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">＇libri" size="3">s evolution under the assumption that the provenance remains unchanged, and thus 5 strengthened periods of winter monsoon were identified since 17 000 a in the East China mainland.