运城盆地鸣条岗地裂缝展布特征与成因分析

doi:10.12196/j.issn.1000-3274.2023.04.004

Abstract

Abstract: The Mingtiaogang fracture is located on the southeast side of the Mingtiaogang land barrier in the northeastern part of the Yuncheng Basin, causing the cracking and deformation of infrastructure along the route, including the cracking of house walls, road cracking, farmland destruction, etc., which has caused a serious impact on agricultural production and people's life along the route. Through a large number of field geological surveys, surface mapping and data collection, this paper obtains the spatial distribution and dislocation data of cracks in the ground. The cracks in the ground extend more than 15 km, striking 58°, with a maximum depth of 2.5 m, a maximum width of 5 m, and a vertical sliding rate of 6.25～8 mm/a. It is determined that the cracks in Mingtiaogang belong to the comprehensive cause of tectonic and non-tectural movements. The ground subsidence caused by super-exploitation of groundwater is its fundamental cause. Due to the different sedimentary thicknesses on both sides of the fault and the settlement difference caused by groundwater collection, the fault of the southern edge of the Mingtiaogang controlles the fracture distribution , while rainfall and loess wet subsidence have a tendency to expand on the fracture formation.

Key words: Yuncheng Basin, Mingtiaogang fracture, Basic characteristics, Genetic model

CLC Number:

P315.7

GUO Chun-shan, LI Wen-qiao, XU Yue-ren, YAN Xiao-bing. Distribution Characteristics and Genetic Analysis of Mingtiaogang Fractures in Yuncheng Basin[J]. EARTHQUAKE, 2023, 43(4): 50-66.

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Distribution Characteristics and Genetic Analysis of Mingtiaogang Fractures in Yuncheng Basin

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