冲绳海槽晚第四纪沉积硅藻及其古海洋学意义  

Late Quaternary sedimentary diatom in Okinawa Trough and its paleoceanographical significance

作　　者：蓝东兆[1] 许江[1] 陈承惠[1] 

机构地区：[1]国家海洋局第三海洋研究所，厦门，361005

出　　处：《台湾海峡》2000年第4期419-425,共7页Journal of Oceanography In Taiwan Strait

基　　金：国家海洋局海底科学重点实验室资助项目!(980 3号 )

摘　　要：本文描述了冲绳海槽北部KL2 2 +KL1 8岩芯的硅藻丰度、优势硅藻种的相对含量、微型硅藻的种类和丰度、热带远洋种的丰度的分布特征 ,讨论了该岩芯的地层年代、古黑潮流等问题。结果表明晚更新世以来黑潮主干未流过研究区 ;岩芯中硅藻丰度和热带远洋种丰度的突然增加系新仙女木 (YD)、海因里奇 (H1 )等古气候变冷事件留下的记录。This paper describes the diatom abundance, relative content of dominant diatom species, micro diatom species and its abundance, and distributive characteristics of tropic pelagic species abundance in KL22+KL18 cores from the northern part of Okinawa Trough. Some problems about the stratichronology of the cores and the ancient Kurushio current are also discussed. The results show that the Kurushio current have not run through the region studied since Late Pleistocene; and the sharp increases of the diatom abundance and tropic pelagic species abundance in the cores are records of the paleoclimatic cooling events of Younger Dryas(YD) and Heinrich I (H1).

关 键 词：沉积硅藻 晚第四纪 冲绳海槽 古海洋学 地层年代 古黑潮流 

分 类 号：P736.22[天文地球—海洋地质]