25 August 1983, Volume 4 Issue 3
    

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  • Huang Peihua
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 1-14. https://doi.org/10.7522/j.issn.1000-0240.1982.0033
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    The paper discusses major processes of Quaternary climatic changes in China from new results of glacialogy, Quaternary geology, micropaleonto-logy, paleomagnetic stratigraphy and so on. The climatic changes have the following characterises:(1)Similar warm and cold climatic variations of the world in Quaternary period had also occurred in China.(2)Cold climatic attacks happened gradually southward with time.Northeast and Northwest China subjected to cold attacks in pliocene period, while North China and Central China in Early Pleistocene and Middle Pleistocene, respectively.But climatic fluctuation was small in South China.(3)From north to south, the amplitude of climatic fluctuation reduced gradually, about 15℃, 10-12℃ and 4-5℃ in North China, Central China and South China, respectively.(4)During ice age, the continent of China was mainly controlled by cold air mass, and glaciation developed in high mountains and dry climate in loess area. In North and Central China dry-cold climate prevailed, while in South China pluvial tropical.In inter-glacial age, the continent was mainly controlled by planetary polar front zone. Glacier in high mountains retreated. Humid climate prevailed in loess area, warm climate in North and Central China, and dry tropical climate in South China.(5)As seen from recent data, southeastern part of China was in a temperate climate in Quaternary cold period with an averge annual temperature at about 7℃.While in Lushan area, it was about 3-4 ℃ at an altidude of 1000-1200m a.s.l. Moreover, Lushan mountain body is small and climatic environment of Lushan area could not develop piedmont glacier.
  • Zhang Xiangsong, Mi Desheng
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 15-28. https://doi.org/10.7522/j.issn.1000-0240.1982.0034
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    The Karakoram is world-famous for its extreme rugged landform, great heights and extensive ice cover to a greater degree than any other mountains in the world. The glaciers in the Karakoram have close relation to the economic and productive activities of the local people. According to geomorphological investigations, documentary records, Landsat images in the 1970s and aerial photo maps and air photographs in the 1960s,we discuss the brief history of the study of its glaciers, their distributive and physical features their thickness their superglacial geomorphic features,their features of geological and geomorphological functions and features of the surging glaciers in the Karakoram Mountains.
  • Zhu Yuanlin, Zhang Jiayi
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 29-39. https://doi.org/10.7522/j.issn.1000-0240.1982.0035
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    The paper mainly discussed the results of compression laboratory tests on frozen soils (with lateral spreading of the soil prevented) at constant negative temperatures.The authors not only described the general behaviors of elastic and compressive deformation of frozen soils, but also listed some of the experimentally obtained values of their characteristics, i. e., the normal elastic modulus E and the summary relative compressibility coefficient ar of frozen soils.Furthermore, on the basis of analyzing the influence of some factors, such as negative temperature, moisture, soil composition and external pressure, on the above two characteristics, the authors presented two equations, for estimating the normal elastic modulus and summary relative compressibility coefficient of frozen soils, respectively, according to negative temperatures of the soils, and also gave the values of corresponding parameters for the equations proposed here.
  • Cai Xiangxing, Li Ilonglian
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 40-40. https://doi.org/10.7522/j.issn.1000-0240.1982.0036
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  • Zhou Fucheng
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 41-52. https://doi.org/10.7522/j.issn.1000-0240.1982.0037
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    This paper presents a potential-drop ratio method with couple electrodes for locating the permafrost regions and proposes a formula for calculating the normal electric field: RN=Q+p/Q-p·(Q-2p)2-1/(Q+2p)2-1 where,AB= 2a, OO’=Qa, MN = 4 pa. When the permafrost area is great enough relative to the distance between electrodes, the values for electric field could be calculated by using: R=Ep2AB/Ep1AB where p1 and p2 are the central points of MO and ON respectively, and Ep2AB, Ep1AB are the electric intensities supplying the electrodes AB locatedat two points p1 and p2 respectvely. Therefore, if the reflection coeffi-cient(K12)and the depth of permafrost table is known, the values for electrical field can be calculated from the definite distance between electrodes. On the basis of the model studies, the author presents the relationship of anomalous values to AB, OO, MN and h1 and the model boundary positions corresponding to the anomalous curves. Consequently, they can provide the basis for locating permafrost regions. At the end of this paper, some field experimental results are listed to show the availability of this mothod for locating permafrost regions.
  • Dai Jingbo
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 53-63. https://doi.org/10.7522/j.issn.1000-0240.1982.0038
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    The ground temperature variation in the permafrost layer in the northern part of the Great Xinan Mountain depends on the latitudinal location of a given region, i.e.from south to north and from southeast to northwest associated with the increasing of latitude and atmospheric temperature decreases. On the other hand, the continuity and the thickness of permafrost increase, so the temperature of permafrost gradually becomes lower. This tendency is especially obvious on the northwest slope of the Great Xinan Mountain. The depth of variation of mean annual ground temperature in permafrost areas in the northern part of the Great Xinan Mountain is generally 12-18 meters or so and 14-15 meters seemingly in majority.According to the variation of amplitude within the depth of the annual ground temperature variation, it may be divided into the zone of diurnal temperature variation, the zone of positive and negative temperature variation, and the zone of permafrost temperature variation.Based on the type of ground temperature curve in permafrost, it may be divided into the positive gradient ground temperature curve,the negative gradient ground temperature curve, the zero gradient ground temperature curve, and the twisty form ground temperature curve. Among them, the type of positive gradient ground temperature curve usually happens in the permafrost region in the northern part of the Great Xinan Mountain and the type of zero gradient ground temperature curve usually distributes near to the southern boundary of permafrost.Under the influence of the extensive: and sustained human’s activies, the ground temperature of permafrost arises, and the type of negative gradient ground temperature curve is formed from the change of positive gradient ground temperature curves. The type of twisty form ground temperature curve occurs scarcely.
  • Li Xingguo, Liu Guanglian, Xu Guoying, Li Fengchao, Wang Fulin
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 65-72. https://doi.org/10.7522/j.issn.1000-0240.1982.0039
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    The little city of Zhalianuoer is situated in the southeast of Manzhouli(Lat.49°20’N Long 117°35’E).In May 1980 at the east opencut of the coalmine of Zhalianuoer, two fossil mammoth skeletons were discovered in theold river bed 35-40 metres below the surface.The C14 age of the mammothcoprolites is 33,760±1,700 years B.P. (PV-170).Mammoth is the representative of the Mammuthus-Coelodontas fauna of the Late Pleistocene in Northeast China, representing a climatic cold environment.We divide the periglacial phenomena of Zhalianuoer stage into three substages:1. Lingquan Periglacial Substage happened about 33,700 years B.P.2. Huangshan Interperiglacial Substage: predominantly between Lingquan Periglacial Substage and Zhalianuoer New Glacial Substage interposed a relatvely warmer period of glacial retreat, extending from about 33,000 years to 23,000 years B.P.3. Zhalianuoer New Glacial Substage: the C14 determinnation of the silt (black clay) is 3,080±80 years B. P. (PV-201), 0.5 metres below the surface, happened about 3,000-5,000 years B.P.
  • Yan Yongding
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 73-76. https://doi.org/10.7522/j.issn.1000-0240.1982.0040
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    Salawusu series is a formation of late pleistocene, a representive formation in northern part of China.The involution which was found in the reach of Salawusu river has following characteristics; a. universality of distribution; b.similarity of shapes; c. lithologic identity of involved beds? d.continuity of involved bed; e.clear stability of the surface between involved and uninvolved beds; f.consistency of depth from involved bed to the surface. This kind of involution was formed by solifluction under the condition of cold climate, a sign of periglacial environment.
  • Zhang Weixin, Zhang Tiengjun
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 77-80. https://doi.org/10.7522/j.issn.1000-0240.1982.0041
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    This paper was written on the data which we got from the field survey very recently.We discovered that there are two kinds of polygonal soil developed at different scales on the plateau.The first type is of greater size with its diameter ranging from 100-150m and 45-50m and its fissure filled with soil and sand.Modern herb grows in the fissure forming green polygonal nets, important ground surface indicators of palaeo-polygonal patterned ground, markedly distributed in glacial troughs and on moriane banks, as well as on stream terraces, and formed under the cold climatic condition of the late pleistocene glaciation period.The other type is of smaller patterned ground with obvious frost cracks with its diameter at about 1 meter and width and depth at about 10-20cm and 30-40cm respectively.It is intensively developed on the plateau and it may be formed during the little ice-age of Holocene Epoch.
  • Shi Yafeng
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 81-86. https://doi.org/10.7522/j.issn.1000-0240.1982.0042
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  • Xia Kairu
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 87-96. https://doi.org/10.7522/j.issn.1000-0240.1982.0043
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  • Xu Xiaozu
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 97-103. https://doi.org/10.7522/j.issn.1000-0240.1982.0044
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  • Shi Yafeng
    JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1982, 4(3): 104-108. https://doi.org/10.7522/j.issn.1000-0240.1982.0045
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