Audio-magnetotelluric data log and station-location map for the Ennis Hot Springs area, Montana
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Abstract
Four days were spent collecting 20 audio-magnetotelluric (AMT) soundings in the area of the Ennis Hot Springs, Mont. (fig. 1). These soundings were made to assist in a regional evaluation of the geothermal potential of the Ennis Hot Springs area.
Scalar resistivities from the data log (table 1) are indicative of thermal water altering the Quaternary alluvium to the southeast. The alteration extends over an area of 1.5 km by 4 km. The geothermal system is probably along a north-south range fault between the Precambrian gneiss and the Tertiary gravels. The scalar resistivities also indicate a northwest trend that may be an intersecting fault. Therefore any geothermal potential would probably be in the area near the existing hot spring, with a possible extent to the northwest of 1 km and to the southeast some 3 km.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Audio-magnetotelluric data log and station-location map for the Ennis Hot Springs area, Montana |
| Series title | Open-File Report |
| Series number | 79-1308 |
| DOI | 10.3133/ofr791308 |
| Year Published | 1979 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | 7 p. |
| Country | United States |
| State | Montana |
| City | Ennis |
| Other Geospatial | Ennis Hot Springs area |
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