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通过宏观、微观变形构造的研究,以及对平衡剖面技术、有限应变测量等方法的系统应用,详细论述了凭祥逆冲推覆构造是在北西—南东向挤压应力作用下于地台盖层中形成的浅层次大型叠瓦状逆冲推覆构造。长度大于30km,总体走向25~40°,断面倾向南东,倾角20~30°,逆冲方向307°,分带特征明显。经平衡剖面计算,其短缩率e=-33.3%,相对长度比εr=66.7%,推覆距离大于5625m,最大主应力为北西—南东向,形成时期为印支—燕山期。
Through the study of macroscopic and microscopic deformation structures, as well as the systematic application of balanced cross-section techniques and finite strain measurement methods, it is discussed in detail that the Pingxiang thrust nappe structure is constructed under the action of north-south-east compression stress on the platform cover Layer formation of shallow large-scale superimposed tile thrust nappe structure. The length is more than 30km, and the general trend is 25 ~ 40 °. The section is inclined to the east, the dip angle is 20-30 ° and the thrust direction is 307 °. The zoning characteristics are obvious. According to the balanced profile, the shortening rate e = -33.3%, the relative length ratio εr = 66.7%, the pushover distance greater than 5625m, the maximum principal stress is northwest-south east, and the formation period is Indo-Yanshan period.