摘要
本文利用取自冲绳海槽中部的Z_(14-6)。孔岩心中所含两种浮游有孔虫进行了氧同位素地层学研究。结果表明,该孔氧同位素记录可划分为6期,其中第5期又可分为5个亚期。与V_(28-238),V_(19-29)孔的氧同位素曲线对比发现,Z_(14-6)孔的氧同位素记录与大洋氧同位素记录完全一致,历时约12.8万年。同时,Z_(14-6)孔氧同位素记录指示出该区12万年来曾存在三个温暖时期。
A lot of papers about the Okinawa Trough were published and concerned with almost every branches of Marine Geology. The present work is to study the oxygen isotopic stratigraphy in the area. The oxygen isotope ratios of two different species of planktonic foramin-jfera in core Z14-6, taken from the middle of the Okinawa Trough, were analysed. The result shows that the δ18O record of Z14-6 can be divided into stages 1-6 and stage 5 can be subdivided into substages a-e. The oxygen isotope record of the core has the same characteristic as the Pacific cores: V28-238 and V19-29 within 128 000 a B. P. and the oxygen isotope record indicates there are three warm periods since the Late Pleistocene.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1990年第5期442-448,共7页
Oceanologia Et Limnologia Sinica
