601 Matching Results

Explore Results

Results: 1 - 24 next
open access

The Flathead Tunnel: A Geologic, Operations, and Ground Support Study, Burlington Northern Railroad, Salish Mountains, Montana

Description: Report issued by the U.S. Bureau of Mines discussing the Flathead Tunnel in Montana. As stated in the introduction, "this information circular is a Bureau of Mines review of tunneling practices typical of the late 1960's. The report provides reference to all pertinent data related to the geology, mining operations, and ground support practices for the Flathead Tunnel" (p. 2). This report includes maps, tables, illustrations, and photographs.
Date: 1974
Creator: Skinner, Eugene H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tectonic Map of Eastern Montana Showing the Distribution of Uranium Deposits

Description: From introduction: A tectonic map for the northern part of the Cordilleran Foreland was compiled to aid in establishing the geologic setting of uranium deposits within the region, and to determine what relationships, if any, exist between the distribution of uranium deposits and localities, and the regional tectonic pattern (Osterwald, 1955). The relationships might suggest new areas favorable for the discovery of uranium deposits in the Cordilleran Foreland as well as in other areas with simil… more
Date: March 1956
Creator: Osterwald, Frank W. & Dean, Basil G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Eastern and Central Montana as a Possible Source Area of Uranium

Description: From abstract: Geologic settings are recognized in central and eastern Montana and in a few places in southwestern Montana that elsewhere are similar to the settings for the occurrence of uranium deposits. Several specific areas in Montana seem favorable for the occurrence of uranium.
Date: April 1956
Creator: Armstrong, Frank C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Comet and Gray Eagle Mines and Adjacent Area, Jefferson County, Montana

Description: Abstract: Anomalous radioactivity and uranium minerals have been found on the dumps of the Comet, Gray Eagle, and Silver Hill mines situated along the Comet-Gray Eagle shear zone. The shear zone is from 50 to 200 feet in width and has been traced 5 1/2 miles. The Gray Eagle mine is currently being reopened but no underground work, with the exception of a few shallow shafts and adits, has been done between the Gray Eagle and Comet mines. Because of the high U3 08 content of the samples from the … more
Date: March 1953
Creator: Becraft, George Earle
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary Report of Reconnaissance for Uraniferous Granitic Rocks in Montana, Idaho, Oregon, Washington, and California

Description: From abstract: A reconnaissance to determine the uranium content of granitic rocks in the western states was made during parts of October and November 1951. The paucity of our knowledge of the granitic rocks that are most likely to contain significant quantities of uranium has prevented all but a very general isolation of areas or types of granitic rocks for reconnaissance examination.
Date: April 1952
Creator: Coats, Robert Roy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Uranium-Bearing Deposits West of Clancey, Jefferson County, Montana

Description: From abstract: Nine uranium deposits occur in a small area west of Clancey, Jefferson County, Mont. These deposits are all in or near silicified fracture zones in quartz monzonite and related rocks of the Boulder batholith. The deposits contain pockets of uranium minerals in cavities in brecciated well-silicified rock. The primary uranium mineral pitchblende has been found in one pod. Secondary uranium minerals occur as fracture linings and in pore spaces in and adjacent to the silicified zones. more
Date: June 1951
Creator: Roberts, Wayne A. & Gude, Arthur J., III
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen