有孔虫壳体Sr/Ca对冰川旋回中海平面变化的响应  

Sr/Ca Ratio of Foraminifera Shell Response to the Change of Sea Level with Glacial-interglacial Cycles

作　　者：陈萍[1] 方念乔[2] 胡超涌[2] 

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001 [2]中国地质大学海洋学院,北京100083

出　　处：《安徽理工大学学报（自然科学版）》2008年第4期8-11,共4页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(40272074)

摘　　要：通过对东北印度洋MD 77181和MD 81349岩芯近260Ka以来浮游有孔虫Globigeri-noides saccu lifer壳体Sr/Ca值的波动分析,讨论了冰川旋回中古气候和环境的变化对海水中Sr/Ca值的影响。结果表明,冰期内海平面下降带来的诸多因素是促进东北印度洋区域的海水中Sr/Ca值升高的原因。有孔虫壳体Sr/Ca值的变化能够作为指示冰期川旋回,尤其是海平面变化的替代性指标。Changes of Sr/Ca ratios in shell of planktonic foraminifera Globigerinoides sacculifer in two cores, MD77181and MD81349, from the NE Indian Ocean were analysed and the influence of palaoclimate and environment changes with glacier gyration on Sr/Ca ratio in seawater was discussed. The resuits show that many factors caused by sea level dropping were responsible for high St/Ca ratio in seawater during glacial age. The Sr/Ca ratio of planktonic foraminifera shell can serve as a indicator for the glacial-interglacial cycles, particularly for the change of sea level.

关 键 词：浮游有孔虫壳 St/Ca值 海平面 冰川旋回 

分 类 号：P53[天文地球—古生物学与地层学]