skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: URANIUM DEPOSITS IN THE PRYOR-BIG HORN MOUNTAINS, CARBON COUNTY, MONTANA, AND BIG HORN COUNTY, WYOMING

Abstract

Uranium deposits in tthe Pryor-Bighorn Mountains of Carbon County, Montana and Big Horn County, Wyoming, U. S. A., occur in the Madison limestone of Mississippian age. This district forms part of the northern rim of the Big Horn Basin in northern Wyoming and south-central Montana. Structrally the area is a compound uplift consisting of numerous asymmetric anticlinea and monoclines, several of which are faulted. These structures were formed during the Laramide orogeny by recurrent movement along zones of weakness within the Precambrian complex. The uranium deposits are located in karst topography in caves, sheet breccias, send silt and clay fillings of the karst caverns. The fill material is insoluble residue from solution of the limestoene aend silt in beds overlying the Madison limestone. The ore mineral is tyuyamunite and metatyuyamunite, closely associated with crystalline calcite. These minerals were deposited togetber in ponded waters within caverns, in silt and clay fillings, along walls of open solution joints and water-courses, send through parts of the prominent solution breccia forming the floor of caveren development. Most deposit contain from a few tons to 500 tons, although a few range up to 8,000 tons. The ore bodies conform to the size and shape ofmore » tbe caveren or solutional form in which they occur. The tenor of the ore is high, usually exceeding 0.50% U/sub 3/O/sub 8/, with some ores assaying as high as 4.0% U/sub 3/O/sub 8/. The V/sub 2/O/sub 8/ content is 20 to 40% higher than uranium. Associated minerals in ores are calcite, limonite, hematite, barite, various clay minerals, and locally gypsum, fluorite, and celestite. The exploration problem in this district consist of locating the courses or channels of the mineralizing solutions through the complex plumbing system'' of the karst topography and finding the filled or plugged caves containing mineral concentrations. (auth)« less

Authors:
Publication Date:
Research Org.:
Division of Raw Materials, AEC.
OSTI Identifier:
4327491
Report Number(s):
A/CONF.15/P/1911
NSA Number:
NSA-12-014793
Resource Type:
Technical Report
Resource Relation:
Other Information: Prepared for the Second U.N. International Conference on the Peaceful Uses of Atomic Energy, 1958. Orig. Receipt Date: 31-DEC-58
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
MINERALOGY, METALLURGY, AND CERAMICS; BARITE; BARIUM SULFATES; CALCITE; CALCIUM CARBONATES; CALCIUM FLUORIDES; CALCIUM OXIDES; CALCIUM SULFATES; CELESTITE; CLAYS; CONFIGURATION; CRYSTALS; DEPOSITS; ECONOMICS; FLUORITE; GEOLOGY; GYPSUM; HEMATITE; IRON HYDROXIDES; IRON OXIDES; LIMESTONE; LIMONITE; MINERALS; MINING; ORES; SILT; SOLUTIONS; STRONTIUM SULFATES; TYUYAMUNITE; URANIUM MINERALS; URANIUM OXIDES; VANADIUM OXIDES; WATER

Citation Formats

Hart, O M. URANIUM DEPOSITS IN THE PRYOR-BIG HORN MOUNTAINS, CARBON COUNTY, MONTANA, AND BIG HORN COUNTY, WYOMING. Country unknown/Code not available: N. p., 1958. Web.
Hart, O M. URANIUM DEPOSITS IN THE PRYOR-BIG HORN MOUNTAINS, CARBON COUNTY, MONTANA, AND BIG HORN COUNTY, WYOMING. Country unknown/Code not available.
Hart, O M. 1958. "URANIUM DEPOSITS IN THE PRYOR-BIG HORN MOUNTAINS, CARBON COUNTY, MONTANA, AND BIG HORN COUNTY, WYOMING". Country unknown/Code not available.
@article{osti_4327491,
title = {URANIUM DEPOSITS IN THE PRYOR-BIG HORN MOUNTAINS, CARBON COUNTY, MONTANA, AND BIG HORN COUNTY, WYOMING},
author = {Hart, O M},
abstractNote = {Uranium deposits in tthe Pryor-Bighorn Mountains of Carbon County, Montana and Big Horn County, Wyoming, U. S. A., occur in the Madison limestone of Mississippian age. This district forms part of the northern rim of the Big Horn Basin in northern Wyoming and south-central Montana. Structrally the area is a compound uplift consisting of numerous asymmetric anticlinea and monoclines, several of which are faulted. These structures were formed during the Laramide orogeny by recurrent movement along zones of weakness within the Precambrian complex. The uranium deposits are located in karst topography in caves, sheet breccias, send silt and clay fillings of the karst caverns. The fill material is insoluble residue from solution of the limestoene aend silt in beds overlying the Madison limestone. The ore mineral is tyuyamunite and metatyuyamunite, closely associated with crystalline calcite. These minerals were deposited togetber in ponded waters within caverns, in silt and clay fillings, along walls of open solution joints and water-courses, send through parts of the prominent solution breccia forming the floor of caveren development. Most deposit contain from a few tons to 500 tons, although a few range up to 8,000 tons. The ore bodies conform to the size and shape of tbe caveren or solutional form in which they occur. The tenor of the ore is high, usually exceeding 0.50% U/sub 3/O/sub 8/, with some ores assaying as high as 4.0% U/sub 3/O/sub 8/. The V/sub 2/O/sub 8/ content is 20 to 40% higher than uranium. Associated minerals in ores are calcite, limonite, hematite, barite, various clay minerals, and locally gypsum, fluorite, and celestite. The exploration problem in this district consist of locating the courses or channels of the mineralizing solutions through the complex plumbing system'' of the karst topography and finding the filled or plugged caves containing mineral concentrations. (auth)},
doi = {},
url = {https://www.osti.gov/biblio/4327491}, journal = {},
number = ,
volume = ,
place = {Country unknown/Code not available},
year = {1958},
month = {10}
}

Technical Report:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item. Keep in mind that many technical reports are not cataloged in WorldCat.

Save / Share: