Investigative Study of an Anomaly at Bracken Bat Cave Preserve Using Electrical Resistivity
Abstract
In a past resistivity survey on the Bracken Bat Cave Preserve property, an anomaly was detected on the fringes of a dipole-dipole survey line. The model that suggested the presence of a possibly large solution cavity. However, since the feature was on the edge of the detection limits, further study of the area was needed. A second electrical resistivity survey using the dipole-dipole method was conducted to investigate the subsurface of the area for possible karst features, placing the anomaly at the center of the line. High contact resistance from a few of the survey stakes required noise removal, but a two-dimensional inverted profile model was produced, revealing the existence of five small dissolution features. While the discovery was not a sizable new cave passage as previously indicated, further study of adjacent cave features and the small-scale voids will help in providing a clearer picture of the hydrologic properties on the preserve.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMNS43D0851B
- Keywords:
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- 0994 Instruments and techniques;
- EXPLORATION GEOPHYSICS;
- 0999 General or miscellaneous;
- EXPLORATION GEOPHYSICS;
- 1835 Hydrogeophysics;
- HYDROLOGY