タクリマカンの砂漠の年齢
1State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Post Office Box 9825, Beijing 100029, China. jmsun@mail.igcas.ac.cn
Science (New York, N.Y.)
|June 17, 2006
まとめ
タクリマカンの砂漠は,気候変動とチベット高原の上昇により530万年以上前に形成されました. これにより,タリム盆地には砂丘が広範囲に広がり,風が吹いた粘土の堆積物がそれを証明しています.
科学分野:
- 地質学 地質学 地質学
- 古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは
- テクトニクス (地質学) とは
背景:
- タクリマカンの砂漠は,チベット高原に隣接するタリム盆地にある.
- 砂漠の形成を理解することは,地域の環境と地質学の歴史を再構築するために不可欠です.
研究 の 目的:
- 南部のタクリマカンの砂漠の層図の配列を調査するために.
- タリム盆地における砂漠化の時期と原因を決定する.
主な方法:
- 厚さ1626メートルの堆積物配列のストラティグラフィック分析.
- 交差した風吹いた泥の層の識別と解釈.
主要な成果:
- 証拠は,少なくとも530万年前にタリム盆地で移動砂丘の流行を示しています.
- 研究された部分のエオリアンシルトの蓄積は,砂漠の形成と拡大と直接関連しています.
- この発見は,ケノゾーイク期末期の気候の悪化と,大気循環パターンの変化と相関しています.
結論:
- タクリマカンの砂漠の形成は少なくとも530万年前に始まった.
- チベットの高原の上昇と関連する気候の変化は,タリム盆地の砂漠化の主な要因でした.
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