作　　者： ;

机构地区： 中国科学院兰州冰川冻土研究所

出　　处： 《地质论评》 1989年第6期543-551,共9页

摘　　要： 关于青藏高原在第四纪大冰期时,是否发生过覆盖整个高原的大冰盖这一问题,早在二十世纪初就出现了分歧。斯文赫丁(1899—1902),罗来兴等(1963)、崔之久(1964)、郑本兴等(1976,1979)认为在青藏高原上没有形成大冰盖,但E.涂宁克尔(1930)、B.M.西尼村(1958)认为在大冰期时,整个高原被大冰盖覆盖着。自1985年至今,西德地貌学家M.库勒多次与中国学者辩论,认为在青藏高原发生过大冰盖,从而在国内外地学界引起了对这一问题的关切。两种观点的主要分歧点在于对高原上的沉积物、沉积序列和地貌认识不一致。大量的现代沉积和地貌调查研究表明,多数被视为冰碛物,并用此重建很低的古雪线和大冰盖,实际上是泥石流和坡积类沉积。真正的冰川沉积物并未遍布于高原上,也没有发育大冰盖。 As early as the beginning of this century, there were divergent views on whether a large ice sheet covered the whole Qinghal-Xizang Plateau in the Quaternary glacial period. Hedin Sven (1899—1902), Luo Laixing et al. (1963), Cui Zhijiu (1964) and Zhen Benxing et al. (1976, 1979) considered that no large ice sheet formed on the Plateau. But E. Trinkler (1930) and V. M. Sinitsun (1958) belived that the whole Plateau was covered by a large ice sheet in the Quaternaty glacial period.Since 1981, M. Kuhle, a F. R. G. geomorphologist has several times argued with Chinese soientists that a large ice sheet existed on the Qinghai-Xizang Plateau, thus causing concerns about this problem in the circles of geoscience both at home and abroad. The main divergence of the two different views lies in the different understanding of the sediments, sedimentary sequences and landform on the plateau. Large amount of recent sediments and geomorpho-logical study show that most of the deposits regarded, as moraines and which were used to reconstruct very low paleosnowlines and extensive ice sheets are actually debris flow and slope wash-related deposits. Real glacial, deposits are not widespread on th Plateau and an extensive ice sheet did not develop.

关 键 词： 冰盖 青藏高原 第四纪

领　　域： [天文地球] [天文地球]