论文部分内容阅读
以GIS为平台,利用遥感影像处理技术和构造地貌学研究方法,以构造地质学为基础,对南丹-都安断裂带及其周边的伴生构造进行了研究。基于遥感影像部分地质异常(线性异常和含水量异常)的自动提取技术,反演、分析了研究区的应力场,发现反演结果与统计的野外资料有很好的对应性,结果表明该区受到NE和近EW向两幕应力场的挤压作用。结合野外调查研究,揭示南丹-都安断裂在印支期表现为右行走滑和南西方向的逆冲,在晚燕山-喜山阶段表现为左行走滑和西向的逆冲作用。南丹-都安断裂带的现今形态表现出明显的分段性:北段以右行走滑和逆冲作用为主;中段以逆冲作用为主;南段以左行走滑和逆冲作用为主。
Taking GIS as a platform, the remote sensing image processing technology and tectonic geomorphology research methods were used to study the associated structures of the Nandan-Du’an fault zone and its surrounding basing on tectonic geology. Based on the automatic extraction technology of partial geologic anomalies (linear anomaly and water anomaly) in remote sensing images, the stress fields in the study area are analyzed and the inversion results are found to be in good agreement with the statistical field data. The results show that this area By the NE and near EW to the two screen squeezing effect of stress field. Based on the field investigation, it is revealed that the Nandan-Du’an fault showed a right-lateral slip and a south-west thrust in the Indosinian and a left-slip and westward thrust in the Late Yanshan-Himalayan Period. The present state of the Nandan-Du’an fault zone shows obvious subdivision: the northern section is dominated by right-lateral strike slip and thrust; the middle section is dominated by thrust; the south section is characterized by left-lateral slip and thrust the Lord.