Relationship Between Holocene Sediment snd Climatic Change in the Plain Area of Northern Taklimakan Desert kk Take Xiaotang Section As Example
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摘要: 本文通过塔克拉玛干沙漠北部平原区典型地层剖面（肖塘剖面）沉积物粒度及元素特征的分析，揭示了本区域全新世以来气候变化的基本规律。沉积物主要由河流冲积作用形成的粘粒层与风力作用所形成的砂粒层组成。粘粒物质与现代河流相特征相一致，砂粒物质与现代流沙性质相类同。沉积层位中元素的迁移转化状况与沉积时期气候ｋ水文条件密切相关。全球性气候波动与地处内陆封闭盆地的协同影响，产生了本区多风、干燥、冷干与暖干相互交替的轮回气候。Abstract: By analyzing the Characteristics of granular and chemical compositions of the Xiaotang profile, he change of Holocene climate in the plain area of northern Taklimakan Desert has been revealed. The sedi-mentary fades mainly consists of clay formed by fluvial washing and aeolian layer caused by wind. Claymaterials coincide with the typical fades of modern river, while the aeolian deposit is similar to the fea-tures of present driftgand. Movement and conversion of elements in sedimentary layers are clowly relat-ed with the climate and hydrographic dandlitions at that time. The- dry and high temperature- dry climate since Holocene has been crented under the background of global climate with impact of localdesert landscape. meanwhile, the windy and dry climate is produced. It is objectively recorded in sedi-mentary fades.
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Key words:
- taklimakan /
- holocene /
- layer /
- xiaotang profile
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