| 内蒙古察右中旗冰臼的发现及古气候意义 |
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| 引用本文： | 李博昀,张明明,张旭,李健,祁才吉,逄思宇.内蒙古察右中旗冰臼的发现及古气候意义[J].化工矿产地质,2016(2):65-70. |
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| 作者姓名： | 李博昀 张明明 张旭 李健 祁才吉 逄思宇 |
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| 作者单位： | 1. 中化地质矿山总局地质研究院，河北涿州，072750;2. 中化地质矿山总局化工地质调查总院，北京，100013 |
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| 摘 要： | 通过对内蒙古中部新发现的冰臼特征研究,认为该冰臼群为第四纪冰川遗迹。冰臼分布在海拔高度2005~2033m地势平缓开阔山顶部,发育于中生代中三叠世浅黄色中细粒二长花岗岩体之上,岩石完整坚硬,冰臼分布较为集中,其形态可分为圆形和不规则形两大类,口宽0.1~1.2m,深0.1~0.3m,形态规则,部分冰臼发育出水口和水流侵蚀槽,其方向不受风向的制约。通过与周边发现的冰臼群对比研究,形态特征基本一致,只是本区冰臼群发育的海拔高度更高,规模较小,但部分冰臼形态更加完整,水流冲刷、流动痕迹明显,符合冰臼的一般特征。总体看,本区冰臼的形成是在厚层冰层消融阶段长期受冰川融水冲刷、研磨作用所致。结合周边冰川遗迹发育情况,认为内蒙古、河北一带第四纪发育过较大规模冰川,可能具大陆冰川的性质。
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| 关 键 词： | 冰臼 冰川遗迹 第四纪冰川 内蒙古 古气候 |
THE DISCOVERY AND PALAEOCLIMATE SIGNIFICANCE OF CHAHAR RIGHT MIDDLE BANNER MOULINS IN ULANQAB CITY,INNER MONGOLIA |
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| Abstract: | The author found the moulins swarms while surveying on regional geological minerals at the middle part of Inner Mongolia, the moulins of which are distributed at the flat top mountain with the altitude of from 2005 meters to 2033 meters and above the Mesozoic middle Triassic buff medium-to fine-grained monzonitic granite which is hard but no cleavage. Some circular moulins and irregular moulins are centralized distributed with the width of from 0.1meters to 1.2 meters and the depth of from 0.1meters to 0.3 meters. The wind direction can not effect that of the osculum and water flow erosion groove which had developed by the moulins. To compare with the surrounding moulins groups, we found that the moulin swarms over here have the higher altitude and small scale but complete shape with the obvious trace caused by water erode and flow, all of which show that they have the general characters of moulins. In general, the moulins were formed by the glacier erode and abrasive action at a long time of ice cover ablation. All above show that there are Quaternary glacier of a large scale which have the same characters with continental glacier, but we have to make the further research on the exact period and standing time as well as the distribution scale and the contrast with the world ice age. |
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| Keywords: | moulin glacial remains Quaternary glacier the middle of inner Mogolia Paleoclimate |
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