نبذة مختصرة : Near-surface geophysical surveys are easily overlooked by grander geophysical investigations regarding “big-picture” ideas and topics; however, this makes near-surface surveys no less critical to the scientific community’s understanding the inner machinations and properties of our planet. This study aims to establish a geophysical foothold in Huntington, West Virginia, a region affluent in deep oil and gas surveys but surprisingly lacking in near surface investigations. To accomplish this, borehole logging surveys were conducted at Marshall University’s MUSCRAT Park to define various petrophysical properties of West Virginian bedrock. Ten 20-meter boreholes were logged surrounding a shallow tunnel constructed by the Engineering Research and Development Center of the U.S. Army Corps of Engineers. This Subterranean Testing Facility is to be used to test the efficacies of current and future geophysical logging methods to detect subsurface tunnels. The suite of geophysical logging tools used is comprised of electrical resistivity tomography (ERT), acoustic borehole imaging (ABI), natural gamma radiation, magnetic susceptibility, fluid temperature and conductivity, and sonic seismic refraction. Groundwater retention and rock fractures provided great challenges with respect to the thoroughness of our investigations. Data from tools reliant on a transmission medium (ERT, ABI, sonic) was often incomplete. However, logging data was supplemented with laboratory testing of rock core samples, including X-ray diffraction and thin section analyses.
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