柴达木盆地第四纪孢粉组合及古气候波动  

Quaternary sporopollen assemblages and paleoclimatic fluctuation in the Qaid am basin

作　　者：康安 朱筱敏[2] 韩德馨[3] 王延斌[3] 康强 

机构地区：[1]中国海洋国际勘探公司,北京100021 [2]石油大学地球科学系,北京102200 [3]中国矿业大学资源开发系,北京100083 [4]中国石油天然气勘探开发公司,北京100011

出　　处：《地质通报》2003年第1期12-15,共4页Geological Bulletin of China

基　　金：中国石油天然气集团公司(CNPC)资助项目

摘　　要：柴达木盆地是中国目前保存较为完整的、连续的、巨厚的河-湖相沉积记录的盆地。通过对ZK701+801、水6孔、涩中6和涩深1井等典型剖面孢子花粉组合特征和分布规律的研究,详细地论述了第四纪孢粉组合带及其所代表的植被、气候演变进程。自1.87MaB.P.以来共识别出了59个孢粉组合带,划分出29个完整的冷暖气候旋回,并且同中国西北第四纪黄土-古土壤系列的37个气候旋回以及深海钻孔氧同位素气候旋回进行了较好的对比。The Quaternary of the Qaidam basin is a successive and complete a ccumulation of fluvial-lacus-trine sediments with a great thickness.Based on a study of Quaternary sporopollen assemblages and their vertical distribution at typical profiles of holes ZK701+801,Shui 6,Sezhong6and Seshen1, this paper discusses in detail Quaternary assemblage zones and the vegetation an d climatic evolution represented by them.A highly precise sporopollen climate c urve is obtained,which shows that alternation of dry-cold and wet-warm clim ates is the basic model of the Quaternary paleoclimate evolution in the Qaidam basin.Altogether59sporopollen assemblage zones and29complete cold-warm pal eoclimatic cycles since1.87Ma B.P.have been recognized.They can be well correlated with the37paleoclimate cycles derived from Qua-ternary loess and p aleosols in northwestern China and the deep sea oxygen isotope climate records.

关 键 词：柴达木盆地 孢粉组合 第四纪 古气候旋回 氧同位素 植被 

分 类 号：Q913.84[天文地球—古生物学与地层学] P532[生物学—古生物学]