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首页> 外文期刊>International Journal of Geophysics >Imaging of Fault and Fracture Controls in the Arbuckle-Simpson Aquifer, Southern Oklahoma, USA, through Electrical Resistivity Sounding and Tomography Methods
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Imaging of Fault and Fracture Controls in the Arbuckle-Simpson Aquifer, Southern Oklahoma, USA, through Electrical Resistivity Sounding and Tomography Methods

机译：通过电阻率测深和层析成像方法对美国俄克拉荷马州南部的Arbuckle-Simpson含水层的断层和断裂控制进行成像

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摘要

Arbuckle-Simpson aquifer in southern Oklahoma, USA, is a major source of water for industrial and municipal use. It is also a major source for spring-fed streams in the area. As part of an ongoing study to map and characterize the Arbuckle-Simpson aquifer, an electrical resistivity tomography (ERT) study and electrical resistivity sounding studies were conducted in Johnston County, Oklahoma, USA, to map the subsurface of a small area of the carbonate aquifer. The main aim of the study was to obtain constraints on the location of near surface faults and fractures and how they control groundwater flow in the study area. The interpreted resistivity section along an N-S profile indicates that the water table in the region is deepening to the south and probably bounded in the north by a south dipping fault. Inverse modeling of 2D electrical resistivity tomography (ERT) data acquired at two adjacent locations within the study area indicate shallow, fractured Arbuckle group rocks saturated with water adjacent to dry rocks. From electrical resistivity mapping results, it is inferred that the Mill Creek block in the Arbuckle-Simpson aquifer is an isolated system, interacting with the northern segment of a silicate-based aquifer through dissolution faults and fractures.
机译：美国俄克拉荷马州南部的Arbuckle-Simpson含水层是工业和市政用水的主要来源。它也是该地区春季水流的主要来源。正在进行的绘制和表征Arbuckle-Simpson含水层的研究的一部分，在美国俄克拉荷马州约翰斯顿县进行了电阻层析成像（ERT）研究和电阻测深研究，以绘制小范围碳酸盐岩的地下图含水层。该研究的主要目的是获得对近地表断层和裂缝的位置以及它们如何控制研究区域地下水流动的约束。沿N-S剖面解释的电阻率剖面表明该地区的地下水位正在向南加深，并可能在北部受到南倾断层的限制。在研究区域内两个相邻位置采集的二维电阻率层析成像（ERT）数据的逆向建模表明，浅水，破裂的Arbuckle组岩石充满了与干岩石相邻的水。从电阻率测绘结果可以推断出，Arbuckle-Simpson含水层中的Mill Creek区块是一个孤立的系统，通过溶蚀断层和裂缝与硅酸盐基含水层的北段相互作用。

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