| 冰缘环境研究的一些进展 |
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| 引用本文： | 王保来.冰缘环境研究的一些进展[J].冰川冻土,1991,13(3):273-280. |
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| 作者姓名： | 王保来 |
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| 作者单位： | 中国科学院兰州冰川冻土研究所 加拿大渥太华大学地质系 |
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| 摘 要： |
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| 关 键 词： | 冰缘 冰楔 |
Some Advances in Periglacial Environment Studies |
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| Wang Baolai.Some Advances in Periglacial Environment Studies[J].Journal of Glaciology and Geocryology,1991,13(3):273-280. |
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| Authors: | Wang Baolai |
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| Abstract: | This paper views some of the advances in the studies of periglacial environment. A large number of ice wedges have been found active in the environment that convertionally would be regarded as too warm for thermal contraction cracking and ice wedge development. Scientists are trying to find the relationship between ice-wedge regrowtb and global change. The recognition of epigenetic and syngenetic ice wedges has long been known, a new type of ice wedges, anti-syngenetic ice wedge, was reported and studied by professor Mackay. Recent research convinces that although ice-wedge pseudomorphs provide unambiguous evidence of former existence of permafrost conditions, it is difficult to define their paleoenvironmental significance with any greater precision. The high pore water pressure that causes pingo uplift is produced by pore water expulsion adjacent to the pingo. All the pingoes contain pore ice, segregation ice, and injection ice, some pingoes have dilation crack ice, and some contain ice-wedge ice. Like ice wedges, no finitive temperature limits can be given for pingo growth because nonclimatic factors such as pingo size, talik size, permafrost thickness, and the time available for pingo growth must be considered. Massive ground ice studies are characterized by the discussion of its origin. Now two main theories for the origin of the thick bodies of massive ground ice known to exist are (1) injection-segregation and (2) buried glacier ice. |
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| Keywords: | anti-syngenetic ice wedges pingo massive ground ice injection-segregation ice buried glacier ice |
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