从洪洞三交河左木剖面看汾河下游30Ka以来的环境变迁  

Environment Evolution in Lower Reaches of Fenhe for the Last 30Ka in the View of Zuomu Profile in Sanjiaohe Hongtong

作　　者：李旭红[1] 马志正[1] 韩军青[1] 卫华[1] 董艳[1] 谢爱红[1] 

机构地区：[1]山西师范大学地理系,山西临汾041004

出　　处：《山西师范大学学报（自然科学版）》2001年第1期73-76,共4页Journal of Shanxi Normal University(Natural Science Edition)

基　　金：山西省自然科学基金! (971 0 2 3)资助

摘　　要：在汾河下游第四纪地质剖面观察的基础上 ,选择了具有代表性的洪洞三交河左木剖面 ,利用沉积物相变方法 ,对沉积物进行分析 .认为汾河下游三万年以来环境有四次大的变化 ,其中后两次变化 ,时间分别为 8Ka- 2 .5Ka B.P和 2 .5Ka以来 ,共有 5次小的波动 ,由此推测 ,今后百年内气候继续变暖 ,波动周期为 30 a- 40 a.Based on the observation of Quaternary geological profiles in lower reaches of Fenhe, this paper chooses the representitional Zuomu profile in Sanjiaohe Hongtong to analyse deposition by means of changes of its corresponding environment. There were 4 major changes in the area for the last 30Ka, the last 2 of which happened separately in 8Ka—2.5Ka B.P. and 2.5Ka—now with 5 little fluctuations. From these, it can be concluded that climate will be warmer in the 100 years, whose cycle is 30—40 years.

关 键 词：洪洞三交河 左木盆地 末次盛冰期 环境变迁 沉积物 相变方法 气候变化 

分 类 号：X141[环境科学与工程—环境科学]