The implications and method for the geomorphochronological approaches to the Qinghai-Xizang Plateau in the 1: 250 000 geological survey
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摘要: 高原隆升及剥蚀作用的复杂性与区域差异性以及高原恶劣的气候、地理条件,使得在青藏高原空白区1:25万区域地质调查中进行地貌年代学研究具有很大的现实意义。由于地貌是高原隆升、环境演化、新构造运动等的信息载体,地貌年代有助于重塑这些地质作用的发生时间及发展过程,因此地貌年代学研究具有重要的技术意义。1:25万银石山幅的工作表明,地貌年代学调查对高原隆升及环境演化过程研究具有良好效果。Abstract: The geomorphochronological approaches are believed to have important implications for the 1:250 000 regional geological survey of the Qinghai-Xizang Plateau because of complicated features of the Plateau uplift and denudation, and foul weather and geographic conditions. The geomorphological features are technologically significant in that they may provide plenty of important informations about the Plateau uplift, environmental evolution and neotectonism, and assist in the reconstruction of the timing and evolution of geological processes. The present paper focuses the significance and method of the geomorphochronological approaches of the Qinghai-Xizang Plateau in the 1:250 000 regional geological survey. The spatial relations among distinctive geomorphological features should be ascertained in the field geological survey, and the samples should be sampled from the localities suitable for the geomorphochronological approaches. The results of research in the study show that the geomorphochronological approaches are effective for the examination of the Plateau uplift and environmental evolution.
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