| 四川西南部小相岭东坡更新世冰川地貌与冰川沉积特征的初步研究 |
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| 引用本文： | 易朝路.四川西南部小相岭东坡更新世冰川地貌与冰川沉积特征的初步研究[J].冰川冻土,1989,11(1):76-81,101,102. |
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| 作者姓名： | 易朝路 |
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| 作者单位： | 中国科学院水生生物研究所 武汉 |
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| 摘 要： |
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| 关 键 词： | 冰川地貌 更新世 冰川沉积 |
A preliminary research of Geomorphological and Depositional Features of Pleistocene Glaciations in the East Slope of Xiaoxianling Mountain in the Southwest of Sichuan Province |
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| Yi Chaolu.A preliminary research of Geomorphological and Depositional Features of Pleistocene Glaciations in the East Slope of Xiaoxianling Mountain in the Southwest of Sichuan Province[J].Journal of Glaciology and Geocryology,1989,11(1):76-81,101,102. |
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| Authors: | Yi Chaolu |
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| Abstract: | There exist three steps of cirques, troughs, four to six lines of lateral moraines, pyramids aretes and end moraines, etc. The first step of cirques have an average altitude of 4150 m a.s.L The second step 3980 m and the third 3710 m a.s.L The lateral moraines near hillslope are larger, higher and older than those away from valleys. In the same valley, lateral moraine on the north side of hills has a larger scale and reach a lower position than those on the south side of hills. The third step of cirques and the lateral moraines near hillslope which have a weathered layer in their surfaces represent earlier stage of Pleistocene glaciation. The other steps of cirques and other lateral moraines represent later stage of Pleistocene glaciation.
The gavels in the tills all came from the bedrocks in the glaciation area and their frabrics are not well-developed. The tills contain more sand and less silt. On the curves of grainsize distribution, main peaks occur in 0-1(?) and the second peaks occur in 2-3(?). There are typical surface textures on the glacial quatz sands, such as compressed pits , striations and "steps" . Leaching of silicon and the accumulation of iron and aluminium are not obvious and illite is the main clay mineral. |
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| Keywords: | the southwest of Sichuan Province Pleistocene glacial landform glacial deposition |
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