【摘要】 霍拉河盆地周围山地与盆地的发育过程、构造活动方式,以及经受外营力作用不同,致使它们地质结构、沉积岩相、岩性、裂隙发育程度及地下水赋存规律等呈现明显差异。由此形成自盆地中心向四周山地冻土厚度明显变薄、温度升高,到周围山地某些地段出现融区。更多还原

【Abstract】 Huola river is located in the north Da Hinggan Ling, and its geographical coordinate ranges from lat. 52°27 ’-53°03 ’ and long. 121°52 ’ -122°04 ’ administratively, this area belongs to Mohe County of Heilongjiang Province.The features of permafrost in the Basin are that from the centre to the margin of the Basin, the thickness of permafrost becomes thinner, from 100-120 m to 10-20 m, and the mean annual ground temperature gets higher, from -2.9℃ to 0.5℃ . Talik occurs on the surrounding mountains only.Geologic structure controls the topography, facies and the distribution of rocks. Because of the differences of development processes, tectonic activity patterns and external agents between the surrounding mountains and the Basin, geologic structure, sendimentary facies, lithology, development degree of fissures and motive regularities of ground water also vary greatly from place to place. These variations play an important part in the formation of permafrost conditions in the Basin.更多还原