西藏札达盆地托林剖面孢粉组合特征及其古气候意义  

Features of the sporopollen assemblage at the Toling section in the Zanda basin, Tibet,China, and its paleoclimatic significance

作　　者：吕荣平[1] 罗鹏[2] 韩建恩[1] 余佳[1] 孟庆伟[1] 邵兆刚[1] 朱大岗[1] 孟宪刚[1] 

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]长安大学地球科学与国土资源学院,陕西西安710054

出　　处：《地质通报》2006年第12期1475-1480,共6页Geological Bulletin of China

基　　金：中国地质调查局<青藏高原第三纪重点古湖泊环境演变序列>项目(编号:200313000066);<青藏高原生态地质环境遥感调查与监测项目>(编号:200315100002)的阶段性成果

摘　　要：西藏札达盆地托林剖面的孢粉分析显示,该地区在5.4～5.05MaBP时期,气候环境由温凉干旱转变为温暖稍湿,植被相应地经历了疏林草原植被—森林草原植被的演变过程;到了5.05～4.40MaBP时期,转变为温暖潮湿的气候,植被亦相应地经历了由森林草原—暖温带针阔叶混交林—亚热带针阔叶混交林的演变过程。总地来说,当时该地区的植被是乔木植物(松属)和草本植物(蒿属、藜科)占主导地位,气候总体表现为温暖湿润。Palynological records of the Toling section in Zanda basin, Tibet, have revealed that at 5.4-5,05 Ma BP the climate changed from warm-cool and dry to warm and slightly wet and that accordingly the vegetation also went through an evolutionary process from the veld to sylvosteppe vegetations. At 5.05-4.40 Ma BP, the climate became warm and wet and the vegetation also underwent an evolutionary process from sylvosteppe→warm-temperate zone mixed coniferous and latifoliate forest→subtropical zone mixed coniferous and latifoliate forest. Generally the vegetation then was dominated by arbores （Pinus） and herbs （Chenopodiaceae and Artemisia）, and the paleoclimate was warm and wet.

关 键 词：西藏 札达盆地 托林剖面 植被 孢粉分析 

分 类 号：P534.62[天文地球—古生物学与地层学] Q914.81[天文地球—地质学]