印度尼西亚弗洛勒斯海LGM以来的古海洋学记录  

Paleoceanography of the Last Glacial Maximum in the Flores Sea of the Indonesian Archipelago

作　　者：丁旋[1] Guichard F. Bassinot F. 魏明军[3] 

机构地区：[1]中国地质大学海洋学院,北京100083 [2]Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, France [3]中石化中原油田采油工程技术研究院,河南濮阳457001

出　　处：《地球科学（中国地质大学学报）》2005年第5期565-572,共8页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金项目(No.40476022).

摘　　要：弗洛勒斯海位于印度尼西亚穿越流通道上,它的古海洋学特征对于理解LGM以来穿越流活动历史,及其与全球气候变化的关系具有重要意义.通过对弗洛勒斯海SHI9011岩心δ18O、δ13C、浮游有孔虫组合及碳酸盐含量等古海洋学记录的研究,认为研究区沉积速率不高,生物生产力却并不低于高沉积速率的近陆地区.冰期时海平面下降,陆源物质输入量增加,使得古生产力上升.冰消期终止期IA海平面快速上升,陆源营养物质供应减少,同时穿越流活动增强,抑制了下部水体向上运动,古生产力开始下降.8～6 ka前后,强烈的东南季风使得研究区上升流活动增强.The Flores Sea is situated in the path of the Indonesian throughflow. Its paleoceanographical characteristic is very important for us to understand the throughflow actions during the last glacial maximum, and the relationship between the throughflow and global climate changes. Based on the study of the paleoceanographical record δ^18O、δ^13C, planktonic foraminifer assemblage and CaCO3 relation abundance of the core SHI9011 from the Flores Sea, the results are following： the sediment rate in the studied region was not high, hut the productivity was not lower than the region nearby the land where sediment rate was high. The sea level dropped in the glacial, the mass of the terrigenous sediment increased, so that the paleoproductivity ascended. The sea level rose rapidly in the ,deglaciation termination, the terrigenous nutrition decreased, and the throughflow action enhanced, restraining the upwelling of the down water, the paleoproductivity descended. In around 8-6 ka, due to the strong southeast monsoon action, the upwelling action enhanced in the studied region.

关 键 词：弗洛勒斯海 末次冰期最盛期 古海洋学 穿越流 东南季风 上升流 

分 类 号：P53[天文地球—古生物学与地层学]