| 四川峨眉山净水谷地冰川遗迹及其意义 |
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| 引用本文： | 骆祥君.四川峨眉山净水谷地冰川遗迹及其意义[J].第四纪研究,1991,11(1):38-42,98. |
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| 作者姓名： | 骆祥君 |
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| 作者单位： | 中国科学院地球化学研究所 IFAQ-UNESCO，布鲁塞尔 |
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| 摘 要： | 峨眉山净水谷地内地貌和地表堆积物据其成因分为两类:一类与现代水系密切相关,如河床、冲沟、阶地、滑坡、岩崩、狭谷等;另一类则与现代水系没有成因和空间对应关系,且构成现今地表的主体,它们是由净水玄武岩漂砾和混积物,弓背山黄土以及基岩(灰岩为主)构成的组合地貌。后一类为冰川成因,记录了该谷地第四纪主要历史演变过程,对研究西藏高原东坡同期冰川作用具有重要意义。弓背山黄土的风积属性表明它不能再生,所以对类似地区这一最基本、最珍贵资源的保护是一项亟待进行的工作。
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| 关 键 词： | 峨眉山 净水玄武岩 漂砾 弓背山黄土 冰川侵蚀地貌 西藏高原大冰盖 |
GLACIATED LANDFORM,ERRATICS AND LOESS IN JINGSHUI VALLEY,EMEI,SICHUAN |
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| Institution: | Institute of Geochemistry, Chinese Academy of Sciences) (IFAQ-UNESCO, VUB, Brussels |
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| Abstract: | A lot of basaltic erratics,which had been drifted from the top of Mt.Emei throughMt.Gongbeishang,association of U-shaped troughs,hanging valley,cirques,aretes,cols,chair-shaped hills and isolated micro-plateau as well as loess cover have been found in Jingshui Val-ley (28°45′N,102°40′E) at 600 m to 1000m a.s.l.,Emei,Sichuan.These adequately indicate thatextensive glaciations,at least once,had taken place in this area during Quaternary. |
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