海洋地质与第四纪地质2009，Vol.29Issue(1)：67-71,5.DOI:10.3724/SP.J.1140.2009.01067
冲绳海槽中部MIS 6期以来Florisphaera profunda百分含量变化及其控制因素
VARIATIONS AND CONTROL FACTORS OF PERCENT CONTENT OF LOWER-PHOTIC CALCAREOUS NANNOFOSSIL SPECIES-FLORISPHAERA PROFUNDA IN THE MIDDLE OF OKINAWA TROUGH SINCE MIS 6
摘要
Abstract
Core Z14-6 (27°07'N, 127°27'E, and water depth 739 m) retrieved from the central Okinawa Trough was selected for planktonic foraminifera and calcareous nannofossil study. On the comparison with SPECMAP δ~(18)O the stratigraphy of Z14-6 was established. By contrast with data of three adjacent cores, the variations and control factors of percent content of Florisphaera profunda in this region during the last 150 ka BP were discussed. Results showed that the variations of percent content of F. Profunda since MIS 6 were characterized by glacial-interglacial cycles. During the last glacial cycle, percent content of F. Profunda was lower in glacial period than that in interglacial period, while which was the reverse situation during the penultimate glacial cycle. The main control factor of percent content of F. Profunda in core Z14-6 is the strengthening changes of Kuroshio Current. The percent content of F. Profunda began to decrease since the end of MIS 5e during the penultimate glacial cycle, based on which we presume that the main current of Kuroshio should weaken or migrate eastward and the coastal water ran into Okinawa Trough.关键词
钙质超微化石/百分含量/MIS 6期以来/冲绳海槽中部Key words
calcareous nannofossil/percent centent/since MIS6/the central Okinawa Trough分类
海洋科学引用本文复制引用
赵京涛,周连成,李军,曹奇原,李铁刚..冲绳海槽中部MIS 6期以来Florisphaera profunda百分含量变化及其控制因素[J].海洋地质与第四纪地质,2009,29(1):67-71,5.基金项目
中国科学院知识创新工程重点方向项目(KZCX2-YW-221) （KZCX2-YW-221）
国家自然科学基金重点项目(40676071) （40676071）
国家重点基础研究发展规划项目(2007CB815903) （2007CB815903）
中国科学院海洋地质与环境重点实验室开放基金资助项目(MGE2008KG03) （MGE2008KG03）
国土资源部海洋油气资源与环境地质重点实验室开放基金项目(MRE200807) （MRE200807）
