冲绳海槽沉积物物源示踪研究进展

RESEARCH PROGRESS OF TRACING SEDIMENT SOURCES IN OKINAWA TROUGH

冲绳海槽作为浅水陆架与深海大洋之间联系的过渡地带,其海底的厚层沉积物记录了晚第四纪海平面波动、构造活动、气候变化,以及冲绳海槽古环境演化信息,因此,对于冲绳海槽沉积物的研究一直是边缘海研究中的热点问题之一,而识别沉积物物源成为解决这一系列问题的关键。众多学者已对冲绳海槽沉积物的来源进行了诸多探讨,并取得了丰硕的成果。在综合前人研究成果的基础上,系统地总结了冲绳海槽沉积物的来源及示踪方法,包括矿物学、地球化学以及环境磁学,评述了目前研究存在的问题,并对未来沉积物物源的识别工作提出了展望。

As a transitional zone between the world＇s largest continent and ocean,the Okinawa Trough is filled with thick depositional sequences that may provide detailed information on Late Quaternary sea level fluctuations,climate changes and tectonic activities as well as environmental evolution.The research of Okinawa trough sediments and trace of the sediment provenance have become hot issues in the study of marginal seas.In recent years,comprehensive researches have been made on sediment sources of the Okinawa Trough and significant progress achieved.Upon the basis,this paper made a systematic summarization on Okinawa trough sediment sources and tracing methods used for source identification,including mineralogy,geochemistry and environmental magnetism.Problems encountered in current researches are reviewed,and future work for identification of sediment provenance is proposed.