活动构造定量研究中的地貌年代问题

Geological Dating of Offset Geomorphologic Units for Quantitative Studies of Active Tectonics

活动断层构造的研究方法与“老”构造的研究方法的一个重要差别,就在于它往往必须借助于各类地貌变形来确定断层活动的性质、方式、活动时代及活动速率;由于活动构造变形所涉及的第四纪地层在大陆地区的分布极其有限,所以各类变形构造地貌单元相当于老构造研究中地层学的基础。本文拟对作为“地层单元”的河流阶地、冰川地貌年代的确定进行探讨。

In active tectonic investigations in continental regions, geological dating of offset morphologic units is fundamental for quantitative studies, as Quaternary strata are usually limited. The basic conception of geological dating of offset morphologic units and that of the methodology has been discussed in this paper. Some field practical examples have been given and emphasized on river terrace geomorphology and glaciation. And, their research history and recent achievements have briefly been reviewed.