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Carl L. Long

Publications and source records attributed to Carl L. Long.

At least 19 recordsLinked to original sources
USGS1986

The Conterminous United States Mineral Assessment Program; background information to accompany folio of geologic, geochemical, geophysical, remote sensing, and mineral resource maps of the Wallace 1 degree x 2 degrees Quadrangle, Montana and Idaho

The Wallace 1? x 2 quadrangle in Montana and Idaho was studied by an interdisciplinary research team that included geologists, geochemists, and geophysicists, as well as specialists in isotopic dating and remote sensing. The basic data resulting from these studies, as well as the final metallic mineral resource assessments, are published as a folio of maps, figures, tables, and accompanying discussions. This circular provides background information on the studies and lists the published components of the resource appraisal. An extensive bibliography lists both specific and general references that apply to this geoscience study of the quadrangle.

Circular↗
USGS1979

Audio-magnetotelluric data log and station-location map for the Silver Star Hot Springs area, Montana

During a period of 3 days, 22 audio-magnetotelluric (AMT) soundings were made in the area of the Silver Star Hot Springs, Mont. (fig. 1). These soundings were made to assess the geothermal potential along a northern trend of. hot springs from New Biltmore Hot Springs north to Broadwater Hot Springs, Mont. Scalar resistivities from the data log (table 1) show that thermal waters have probably altered the Cenozoic basin fill to the northeast for at least 4-5 km. Leakage of the geothermal system to the surface is probably taking place along a range-front fault at the contacts between the Precambrian metamorphics on the west and the Cenozoic basin fill on the east. Any potential geothermal system would probably be in the area near the existing hot springs or within a few kilometers to the north or northeast.

Montana↗
USGS1979

Audio-magnetotelluric data log and station-location map for the Ennis Hot Springs area, Montana

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.

Montana↗