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针对冰川沉积系列细砂粉砂在埋藏前的曝光问题,笔者等人在帕米尔阿依直苏冰川做了观察。本文结合这些观察结果从沉积学角度讨论冰川沉积系列在产生、搬运、沉积过程中的曝光问题,并参考前人研究,将各类冰川沉积进行归纳。认为组成冰碛3个来源的细粒物质中,风成的全部曝光、岩壁风化碎屑部分曝光、冰川侵蚀岩屑不曝光;3个沉积系列中,冰水沉积完全曝光、冰川接触沉积中冰砾阜完全曝光、蛇形丘基本不曝光;冰碛物在沉积过程中,冰面融出碛基本上曝光、冰下滞碛和融出碛不曝光。本文根据分析,给出了冰川沉积系列曝光评估参考值。
In view of the exposure of the glacial sedimentary series of fine sand before burying, the author et al observed in the Pamir Azi Glacier. Based on these observations, this paper discusses the exposure problems of glacial sediments in the process of production, handling and deposition from the perspective of sedimentology. Based on the previous studies, the author summarizes various types of glacial deposits. In the three sedimentary series, the complete exposure of glacial sediments, glacial-contact deposition Complete exposure of the ice and gravel, snake-shaped mound basically no exposure; moraine in the deposition process, the ice melting moraine basically exposed, the ice under the moraine and melting out of the moraine is not exposed. Based on the analysis, this paper gives a glacial sedimentary series of exposure evaluation reference value.