收稿日期: 2008-11-21
修回日期: 2009-05-25
网络出版日期: 2009-10-10
基金资助
中国科学院重要研究方向项目“西部冰川变化监测及其影响评估方法研究”（编号：KZCX2-yw-301);科技部基础性工作专项项目“中国冰川资源及其变化调查”（ 编号：2006FY110200）;国家自然科学基金项目“典型海洋性冰川海螺沟冰川冰内及冰下水系演化示踪研究”（编号：40801030）资助.
Structural Characteristics of the No.12 Glacier in Laohugou Valley, Qilian Mountain Based on the Ground Penetrating Radar Sounding
Received date: 2008-11-21
Revised date: 2009-05-25
Online published: 2009-10-10
武震 , 刘时银 , 张世强 . 祁连山老虎沟12号冰川冰下形态特征分析[J]. 地球科学进展, 2009 , 24(10) : 1149 -1158 . DOI: 10.11867/j.issn.1001-8166.2009.10.1149
The inner-structure of glacier was analyzed from the profile images of ground-penetrating radar at No.12 Glacier in Laohugou Qilian Mountain western China. By calculating the difference of dielectric constants among water, air, bedrock, debris and ice, integrated with changes in radar wave polarity and velocity, the geomorphic character within the glacier was described and caves, caves with water, channels beneath the ice, the interface between glacier and bedrock were identified and positioned, with the comparison of wave patterns introduced in some literatures. The results suggest that there exist debris layers between ice-bedrock interfaces indicating that strong basal erosional processes may even prevail in certain part of a glacier of the continental characteristic, contrary to the early knowledge about this kind of glaciers.
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