Tables presenting data related to mineral occurrences in the area of the associated report, Wallace and Choteau NTMS Quadrangles, Montana and Idaho. Listed are the number, location, name, commodities, and associated environment for samples from 24 mineralized localities. Also included is an index to abbreviations used in the tables.

Table listing the 1,073 known mineral occurrences in the project area, the Dillon, Butte, Hamilton, and Elk City 1º x 2º NTMS Quadrangles. Included is an additional table indexing abbreviations and terms used the mineral occurrence table for host or associated rocks, deposit types, and commodities.

Text summarizing the features of the 10 type localities and 30 anomalous areas for mineral occurrences in the project area, the Dillon, Butte, Hamilton, and Elk City 1º x 2º NTMS Quadrangles. Each report includes date, chemical symbols for major/minor metals, location data, geochemical features, radiometric features, geophysical features, structural features, and host rocks.

The datasets presented contains histograms and probability graphs of stream sediment data that were studied in its parent document, Use of NURE and Other Data Sets to Characterize Mineralized Environments in the Wallace and Choteau NTMS Quadrangles, Montana and Idaho.

Reports summarizing the features of the 24 mineralized localities in the project area, the Wallace and Choteau NTMS Quadrangles, Montana and Idaho. Each report includes date, chemical symbols for major/minor metals, location data, geochemical features, radiometric features, geophysical features, structural features, and host rocks.

Graphs showing the frequency distribution and probability of uranium deposits for mineralized environments in the Dillon, Butte, Hamilton, and Elk City 1º x 2º NTMS Quadrangles.

Purpose and scope: The purpose of the study was to determine whether a thin layer of volcanic ash measurably affects aquatic environments. Study objectives were to: (1) Determine the amount of ash initially deposited in Big Creek basin and the amount remaining 1 year after the eruption, and (2) describe the impact of ash on water quality and benthic invertebrate communities.

The geothermal resource of southern Idaho as assessed by the U.S. Geological Survey in 1978 is large. Most of the known hydrothermal systems in southern Idaho have calculated reservoir temperatures of less than 150 C. Water from many of these systems is valuable for direct heat applications. A majority of the known and inferred geothermal resources of southern Idaho underlie the Snake River Plain. However, major uncertainties exist concerning the geology and temperatures beneath the plain. The largest hydrothermal system in Idaho is in the Bruneau-Grang View area of the western Snake River Plain with a calculated reservoir temperature of 107 C and an energy of 4.5 x 10 to the 20th power joules. No evidence of higher temperature water associated with this system was found. Although the geology of the eastern Snake River Plain suggests that a large thermal anomaly may underlie this area of the plain, direct evidence of high temperatures was not found. Large volumes of water at temperatures between 90 and 150 C probably exist along the margins of the Snake River Plain and in local areas north and south of the plain.

From purposes and approach of study: The primary purposes of this study were to: (1) Define, on a reconnaissance level, current (1980) water-quality conditions in major aquifers (water-yielding rock formations) in the western Snake River basin, Swan Falls to Glenns Ferry; (2) summarize and interpret available geologic and hydrologic data to assist in understanding the natural and man-cause factors that affect present and future understanding the natural and man-caused factors that affect present and future water-quality conditions; and (3) establish a hydrologic data base on which future data can be compared to evaluate changes. A secondary purpose was to evaluate the possible effects percolation of thermal water applied for irrigation may have on the quality of local, less mineralized, nonthermal ground water.

All chemical data for geothermal fluids in Idaho available as of December 1981 is maintained on GEOTHERM, computerized information system. This report presents summaries and sources of records for Idaho. 7 refs. (ACR)

This compilation contains chemical data for geothermal fluids in Idaho available as of December, 1981. The 951 records contain data on location, sample description, analysis type, collection condition, flow rates, and the chemical and physical properties of the fluid. Stable and radioactive isotope data are occasionally available. 6 refs.

"This project was conducted to integrate National Uranium Resource Evaluation (NURE) geochemical and geophysical data from butte, Dillon, Elk City, and Hamilton NTMS Quadrangles."

Maps showing the locations of aerial radiometric data for mineral occurrences in the project area, the Dillon, Butte, Hamilton, and Elk City 1º x 2º NTMS Quadrangles.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

From purposes of approach of study: The purposes of this study were to: (1) Define, on a reconnaissance level, current (1979) water-quality conditions in major aquifers (water-yielding rock formations) in the eastern Snake River basin; (2) present available geologic and hydrologic data to assist in understanding the natural and man-caused factors that affect water-quality conditions; and (3) establish a hydrologic base upon which future comparisons can be made to evaluate changes.

This report follows the study to recognize, characterize, and delineate mineralized environments in the Wallace and Choteau quadrangles of Idaho and Montana.

Maps showing mineral occurrence data plots, National Uranium Resource Evaluation (NURE) radiometric data, and NURE aeromagnetic data displays for mineralized environments in the Wallace and Choteau NTMS Quadrangles, Montana and Idaho.