National Uranium Resource Evaluation: Torrington Quadrangle, Wyoming and Nebraska

One of 124 reports in the series: United States Department of Energy Grand Junction Office Reports available on this site.

PDF Version Also Available for Download.

Description

From Purpose and Scope of Study: "The Torrington 1ºx2º Quadrangle in southeastern Wyoming and a small area of westernmost Nebraska was evaluated to determine areas favorable for the occurrence of uranium deposits. Geologic environments (areally or stratigraphically restricted parts of a geologic unit) were placed in categories of favorable, unfavorable, or unevaluated."

Physical Description

vi, 52 p. : ill., maps (11 folded), microfiche (19 in pocket)

Creation Information

Seeland, David A.; Christiansen, A. C. & Denson, N. M. September 1982.

Context

This report is part of the collection entitled: Technical Report Archive and Image Library and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Titles

Description

From Purpose and Scope of Study: "The Torrington 1ºx2º Quadrangle in southeastern Wyoming and a small area of westernmost Nebraska was evaluated to determine areas favorable for the occurrence of uranium deposits. Geologic environments (areally or stratigraphically restricted parts of a geologic unit) were placed in categories of favorable, unfavorable, or unevaluated."

Physical Description

vi, 52 p. : ill., maps (11 folded), microfiche (19 in pocket)

Notes

Abstract: The Torrington 1° x 2° Quadrangle in southeastern Wyoming and western Nebraska was evaluated to identify areas favorable for the occurrence of uranium deposits likely to contain 100 tons of uranium with an average grade of not less than 100 ppm (0.01 percent) U₃O, Almost all uranium occurrences reported in the literature were visited and sampled. Geochemical analyses of rock samples collected during the study were used in the evaluation. Hydrogeochemical and stream-sediment analyses were not available. Aerial-radiometric, and helium soil-gas surveys were analyzed. Much of the quadrangle is covered by Tertiary rocks. To assess the uranium potential of the Tertiary and pre-Tertiary rocks 270 well logs were studied and both contour and geologic maps made of the pre-Oligocene surface east and north of the Laramie Mountains. Five environments favorable for uranium deposits were outlined. The first is in the coarse-grained arkosic sandstone facies of the Wasatch Formation and the Lebo Member of the Fort Union Formation in the southern Powder River Basin; this facies was once overlain by tuffaceous rocks and the arkose was derived from granitic rocks of the Laramie (and Granite?) Mountains. The second is in the Wind River Formation in the Shirley Basin, a stratigraphic and lithologic equivalent of the Wasatch. The third is the Lower Cretaceous Cloverly Formation in the northeastern part of the quadrangle' the environment favorable for uranium deposits is entirely in the subsurface and is defined by widely spaced gamma-ray logs. The fourth is in the Upper Cretaceous Lance (Laramie) Formation and the Fox Hills Sandstone in the southeastern corner of the quadrangle; the favorable environment is entirely in the subsurface. A pre-Oligocene valley crossing the favorable unites created a particularly favorable environment for uranium deposits. Substantial drilling activity also suggests more widespread uranium favorability. The fifth favorable environment is the Precambrian rocks in the Laramie Mountains and Hartville uplift; fractured rocks in the favorable parts of these areas were once (and in places still are) overlain by tuffaceous rocks of the White River Formation. The areas that were once beneath the Oligocene White River contain nearly all the occurrences and have associated helium and aerial-radioactivity anomalies.

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

Collections

This report is part of the following collection of related materials.

Technical Report Archive and Image Library

This selection of materials from the Technical Report Archive and Image Library (TRAIL) includes hard-to-find reports published by various government agencies. The technical publications contain reports, images, and technical descriptions of research performed for U.S. government agencies. Topics range from mining, desalination, and radiation to broader physics, biology, and chemistry studies. Some reports include maps, foldouts, blueprints, and other oversize materials.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • September 1982

Added to The UNT Digital Library

  • Oct. 25, 2017, 10:43 p.m.

Description Last Updated

  • Jan. 3, 2018, 9:50 a.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 6

Where

Geographical information about where this report originated or about its content.

Boundaries

  • N:43.0, E:-104.0, S: 42.0, W:-106.0

Map Information

  • Place Name boundaries noted by our staff.
  • map marker Automatically generated Place Name coordinates.
  • Repositioning map may be required for optimal printing.

Mapped Locations

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Seeland, David A.; Christiansen, A. C. & Denson, N. M. National Uranium Resource Evaluation: Torrington Quadrangle, Wyoming and Nebraska, report, September 1982; (digital.library.unt.edu/ark:/67531/metadc957771/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.