中国西藏南部珠穆朗玛峰地区第四纪气候的变迁

世界第一高峰--珠穆朗玛峰位于喜马拉雅山中段。喜马拉雅山又是世界上最高大的山脉。在那里,群峰争妍、白雪皑皑、山高谷深,地势极为险峻,藏族人民称她为“冰雪的家乡”。它的上升对我国和亚洲北部地区的气候和自然产生着巨大的影响;也是研究第四纪气候变迁的理想阵地。长期以来,关于本区复杂多变的古气候等问题曾引起了中外学者们的广泛注意。

CLIMATIC CHANGES IN THE MOUNT JOLMO LUNGMA REGION SOUTHERN TIBET, CHINA, DURING THE QUATERNARY PERIOD

A great amount of materials relating to the Quaternary glaciation and deposits has been secured by members of the Scientific Expedition of Academia Sinica in the Mount Jolmo Lungma region and adjacent areas in 1966-1968. They form the object of the present study.On the basis of field observation and laboratory studies on the stratigraphy, .sedimentary petrology and paleontology, it is shown that three distinct glaciations separated by two interglacial stages had occurred in this region during the Quaternary period. The glacial and interglacial stages are in descending order as follows:Jolmplungma glacial stage (late Pleistocene)Chiapula interglacial stage (middle Pleistocene)Niehnien-Hsungla glacial stagePhari interglacial stage (early Pleistocene)Shisha Pangma glacial stageFinally, paleoclimatic problems are tackled in comparison with other regions of the world.