• 责任者：Dou Yanguang (State Key Laboratory of Marine Geology ; Tongji University ; Shanghai200092 ; China) ; Yang Shouye
• 刊名：Quaternary Sciences
• 出版年：2011
• 卷期：31(2)
• 关键词：海洋沉积物 ; marine sediments ; 陆源物质 ; terrigenous materials ; 晚第四纪 ; Late Quaternary ; 冲绳海槽 ; Okinawa Trough
• 页码：p.236-243
• 图表：3 illus., 49 refs.
• 分类号：1400
• issnNo：ISSN1001-7410
• isbnNo：CN11-2708/P

In this study, the authors report the contents of TOC, opal and CaCO₃ in sediments recovered from Core DGKS9604 (28°16.64’N, 127°01.43’E), with aim to understand the changing influx of terrigenous materials and paleo-environmental evolution of the middle Okinawa Trough during the last 28 ka. The authors selected 93 samples to measure the opal by colorimetric measurement of phosphorus as molybedenum blue and 188 samples to analyze total carbon, total organic carbon and carbonate. The changes of CaCO₃ content and accumulation rate were contrary to the downcore variations of opal and TOC, showing lower values during the late last glaciations and gradual increase during the last deglaciation, which suggests the dilution effect induced by the terrigenous materials.