• 责任者：Wang Xiaoqun (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Wang Lansheng
• 刊名：Earth Science
• 出版年：2013
• 卷期：38(5)
• 关键词：湖泊沉积物 ; lake sediments ; 孢粉组合 ; palynological assemblage ; 岷江 ; Minjiang River
• 页码：p.975-982
• 图表：4 illus., 3 tables, 22 refs.
• 分类号：1400
• issnNo：ISSN1000-2383
• isbnNo：CN42-1233/P

     Many samplings,tests and analysis are carried out to study the lacustrine sediments which are more than 200mthick inside the Diexi ancient dammed lake on Minjing river.The pollen and spore of the sediments and sedimentation time are tested by which the ancient dammed lake sedimentation time and climate-environment characteristics are obtained.It is found that bottom parts of the ancient dammed lake lacustrine sediments were formed 30 000years ago,while the parts close to the top formed 15 000years ago.The pollen and spore test results indicate that the sediment section of the ancient dammed lake can be classified into the following 9climate-environment sections：（1）Cool and semi-moist,needle leave and broad leave mixed forest and grassland climate-environment;（2）cold and dry,needle leave forest and grass land climate-environment;（3）cool and semi-moist,needle leave and broad leave mixed open forest and grassland climate-environment;（4）warm and humid,needle leave and broad leave mixed forest grassland climate-environment;（5）cool and semi-dry,needle leave and broad leave mixed open forest and grassland climate-environment;（6）cool and semi-moist forest and grassland climate-environment;（7）cold and dry,open forest and grassland climate-environment.The evolution characteristics of the Palaeo-climate and Palaeoenvironment of the transition area of east edge of Qinghai-Tibetan Plateau to Sichuan basin during time period between 30 000 to 15 000years ago is described,which can provide information for the regional environment study.