OREO ERT

These are data from two electrical resistivity surveys that took place across the western lateral shear margin in the transport zone of Oak Ridge Earthflow. We conducted the first survey in June 2018 and then in November 2018 we reoccupied the same line. A SuperSting R8 system (Advanced Geosciences Inc. [AGI], Austin, TX, USA) was used for a survey line that spanned approximately 90 meters and used 45 electrodes spaced two meters apart. Each electrode was pinned to the underlying sediment with a 35-cm stainless steel spike. In an effort to minimize known potential errors, each electrode was tested to ensure a good and consistent connection to the ground. For each survey date, we repeated surveys to acquire data in both dipole-dipole and Schlumberger configurations. Apparent resistivity values were calculated based on the known value of current injected and the measured value of voltage at each electrode. We then inverted the results to obtain electrical resistivity tomography. During data processing, we used a topographic profile derived from 3-meter resolution LiDAR to account for influences from variable topography. The files presented below include the inverted data for the dipole-dipole and Schlumberger configurations on both survey dates, a terrain file for each survey data, and Matlab scripts that make the necessary topographic corrections and plot the inverted data.

Elevation data for terrain corrections come from the U.S. Geological Survey National Elevation Dataset referenced below.

本数据集汇集了两次在橡树岭地球流输送区西部横向剪切边缘进行的电 resistivity 调查数据。首次调查于2018年6月进行，随后在2018年11月，我们对同一测线进行了复测。调查过程中，我们采用了 SuperSting R8 系统（美国德克萨斯州奥斯汀的先进地球科学公司[AGI]），该系统覆盖了约90米的测线，并间隔两米设置了45个电极。每个电极均通过35厘米的不锈钢尖刺固定于下伏沉积物中。为了尽可能减少已知潜在误差，每个电极都经过测试，以确保与地面的良好且一致的连接。对于每个调查日期，我们重复进行了调查，以获取偶极-偶极和Schlumberger配置下的数据。通过已知注入电流值和每个电极测量的电压值，计算了视电阻率值。随后，我们对结果进行了反演，以获得电电阻率层析成像。在数据处理过程中，我们利用3米分辨率的激光雷达地形剖面，以考虑可变地形的影响。下述文件包含了两次调查日期的偶极-偶极和Schlumberger配置的反演数据，每个调查数据的地面文件，以及执行必要的地形校正并绘制反演数据的Matlab脚本。用于地形校正的高程数据源自美国地质调查局国家高程数据集。