Calcareous nannofossil bioevents and microtektite stratigraphy in the Western Philippine Sea during the Quaternary  

作　　者：SUN HanJie LI TieGang SUN RongTao YU XinKe CHANG FengMing TANG Zheng 

机构地区：[1]Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China [2]Graduate University of the Chinese Academy of Sciences, Beijing 100049, China [3]School of Resource & Environment Engineering, Shandong University of Technology, Zibo 255049, China [4]China Geological Survey, Qingdao Institute of Marine Geology, Qingdao 266007, China

出　　处：《Chinese Science Bulletin》2011年第25期2732-2738,共7页

基　　金：supported by the Pilot Project of the National Knowledge Innovation Program of the Chinese Academy of Sciences (KZCX2-YW-221);the National Natural Science Foundation of China (40906030,40976026and40906038);the National Basic Research Program of China (2007CB815903)

摘　　要：Two sediment cores, MD06-3050 and MD06-3047, were analyzed to study the Quaternary calcareous nannofossil and microtektite records. We dated bioevents and the microtektite impact event by calibrating with oxygen isotope stratigraphy. Seven calcareous nannofossil bioevents were identified over the past 2.36 Ma including the last appearance of data for Discoaster brouweri, Calcidiscus macintyrei, large Gephyrocapsa and Pseudoemiliania lacunosa, the first appearance of data for large Gephyrocapsa and Emiliania huxleyi, and the abrupt increase in the abundance of Gephyrocapsa caribbeanica. In addition, we fortunately observed that Australasian microtektites were distributed in core MD06-3050 from 1340 to 1374 cm.Two sediment cores, MD06-3050 and MD06-3047, were analyzed to study the Quaternary calcareous nannofossil and microtektite records. We dated bioevents and the microtektite impact event by calibrating with oxygen isotope stratigraphy. Seven calcareous nannofossil bioevents were identified over the past 2.36 Ma including the last appearance of data for Discoaster brouweri, Calcidiscus macintyrei, large Gephyrocapsa and Pseudoemiliania lacunosa, the first appearance of data for large Gephyrocapsa and Emiliania huxleyi, and the abrupt increase in the abundance of Gephyrocapsa caribbeanica. In addition, we fortunately observed that Australasian microtektites were distributed in core MD06-3050 from 1340 to 1374 cm.

关 键 词：钙质超微化石 同位素地层学 第四纪 菲律宾海 西方 沉积物岩心 撞击事件 

分 类 号：P534.63[天文地球—第四纪地质学]