Helicopter electromagnetic and magnetic survey maps and data, East Poplar oil field area, Fort Peck Indian Reservation, northeastern Montana, August 2004
Open-File Report
2006-1216
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Abstract
This report is a data release for a helicopter electromagnetic and magnetic survey that was conducted during August 2004 in a 275-square-kilometer area that includes the East Poplar oil field on the Fort Peck Indian Reservation. The electromagnetic equipment consisted of six different coil-pair orientations that measured resistivity at separate frequencies from about 400 hertz to about 140,000 hertz. The electromagnetic resistivity data were converted to six electrical conductivity grids, each representing different approximate depths of investigation. The range of subsurface investigation is comparable to the depth of shallow aquifers. Areas of high conductivity in shallow aquifers in the East Poplar oil field area are being delineated by the U.S. Geological Survey, in cooperation with the Fort Peck Assiniboine and Sioux Tribes, in order to map areas of saline-water plumes. Ground electromagnetic methods were first used during the early 1990s to delineate more than 31 square kilometers of high conductivity saline-water plumes in a portion of the East Poplar oil field area. In the 10 years since the first delineation, the quality of water from some wells completed in the shallow aquifers in the East Poplar oil field changed markedly. The extent of saline-water plumes in 2004 likely differs from that delineated in the early 1990s. The geophysical and hydrologic information from U.S. Geological Survey studies is being used by resource managers to develop ground-water resource plans for the area.
Suggested Citation
Smith, B.D., Thamke, J., Cain, M.J., Tyrrell, C., and Hill, P.L., 2006, Helicopter electromagnetic and magnetic survey maps and data, East Poplar oil field area, Fort Peck Indian Reservation, northeastern Montana, August 2004 (Version 1.0): U.S. Geological Survey Open-File Report 2006-1216, Report: iv, 19 p.; Appendix, Spatial Data, https://doi.org/10.3133/ofr20061216.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Helicopter electromagnetic and magnetic survey maps and data, East Poplar oil field area, Fort Peck Indian Reservation, northeastern Montana, August 2004 |
| Series title | Open-File Report |
| Series number | 2006-1216 |
| DOI | 10.3133/ofr20061216 |
| Edition | Version 1.0 |
| Year Published | 2006 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | Report: iv, 19 p.; Appendix, Spatial Data |
| Time Range Start | 2004-08-01 |
| Time Range End | 2004-08-31 |
| Country | United States |
| State | Montana |
| Other Geospatial | East Poplar oil field area, Fort Peck Indian Reservation |
| Online Only (Y/N) | Y |
| Additional Online Files (Y/N) | Y |