| 西藏札达盆地上新世托林组剖面环境变化记录 |
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| 引用本文：余佳,罗鹏,韩建恩,孟庆伟,吕荣平,孟宪刚,朱大岗,邵兆刚.2007.西藏札达盆地上新世托林组剖面环境变化记录[J].地球学报,28(4):341-348. |
| DOI：10.3975/cagsb.2007.04.04 |
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| 基金项目:国家自然科学基金项目(编号:40572134); 中国地质调查局项目“青藏高原第三纪重点古湖泊环境演变序列”(编号:200313000066) |
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| 中文摘要:对西藏札达盆地上新世托林组的孢粉、沉积物粒度、磁化率、碳酸盐、易溶盐和ESR年代等测试数据的综合分析,得到5.40～4.40 Ma时期环境变化的丰富信息.5.24～4.72 Ma时期,气候温凉干旱,属于针阔叶疏林草原环境特征;4.72～4.67 Ma时期,河流水量增多,气候湿润,孢粉组合表现出温带森林草原环境特征;4.67～4.40 Ma时期,气候进一步向温暖湿润方向发展,属于暖温带针阔叶混交林环境特征. |
| 中文关键词:西藏 札达盆地 托林组剖面 环境变化 |
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| Records of Environmental Change in Pliocene along Tuolin Formation in Zanda Basin, Tibet |
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| Abstract:Based on an analysis of such measured data of environmental proxies as sporopollen,grain size,magnetic susceptibility,carbonate content,soluble salts and ESR dating,It is held that Tuolin section contains abundant information of environmental changes from 5.40 Ma to 4.40 Ma.During 5.24～4.72 Ma,the climate was warm and dry,and the forest vegetation consisted of needle leaf and broadleaf veld;during 4.72～4.67 Ma,the river flow increased,the climate was warm and wet,and the vegetation comprised temperate forest and veld;during 4.67～4.40 Ma,the climate became more and more warm and wet,and the vegetation was composed of warm temperate deciduous and broadleaf veld. |
| keywords:Tibet Zanda Basin Tuolin Formation environmental change |
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