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Sedimentology and Depositional History of the Lower Paleocene Tullock Member of the Fort Union Formation, Powder River Basin, Wyoming and Montana

Description: From abstract: This report is a study on the history of sedimentology and deposition of the lower Paleocene Tullock Member of the Fort Union Formation, Powder River Basin, Wyoming and Montana while looking at the geometry and sedimentary structures.
Date: 1993
Creator: Brown, Janet L.
Partner: UNT Libraries Government Documents Department

The Lance Formation: Petrography and Stratigraphy, Powder River Basin and Nearby Basins, Wyoming and Montana

Description: From abstract: The uppermost Cretaceous Lance Formation was studied in the Powder River Basin and nearby basins of Wyoming and Montana. The Lance Formation is overlain by the continental Paleocene Fort Union Formation. This report is a petrography and stratigraphy study on these basins.
Date: 1992
Creator: Connor, Carol Waite
Partner: UNT Libraries Government Documents Department

Mineral Resources of the McCullough Peaks Wilderness Study Area, Park County, Wyoming

Description: From abstract: The McCullough Peaks Wilderness Study Area (WY-010-335) is located near the western edge of the Bighorn Basin, Park County, Wyoming. The area is about 10 miles northeast of Cody. Mineral and energy resource assessment of the McCullough Peaks Wilderness Study Area indicates a total of 52 million tons of measured and indicated subbituminous coal resources.
Date: 1990
Creator: Hadley, Donald G.; Ryder, Robert T.; Hill, Randall H. & Kulik, Dolores M.
Partner: UNT Libraries Government Documents Department

Mineral Resources of the Medicine Lodge, Alkali Creek, and Trapper Creek Wilderness Study Areas, Big Horn County, Wyoming

Description: From introduction: This report presents an evaluation of the mineral endowment (identified resources and mineral resource potential) of the study area and is the product of several separate studies by the U.S. Bureau of Mines (USBM) and the U.S. Geological Survey (USGS). Identified resources are classified according to a modification of the system described by McKelvey (1972) and the USBM and USGS (1980), which is shown in the Appendix. Identified resources are studied by the USBM. Mineral resource potential is the likelihood of occurrence of undiscovered metals and nonmetals, industrial rocks and minerals, and of undiscovered energy sources (coal, oil, gas, oil shale, tar, and geothermal sources). It is classified according to the system of Goudarzi (1984) and is shown in the Appendix. Undiscovered resources are studied by the USGS.
Date: 1989
Creator: Hosterman, John W.; Hill, Randall H.; Kulik, Dolores M. & Gese, Diann D.
Partner: UNT Libraries Government Documents Department

Mineral Resources of the Bobcat Draw Badlands Wilderness Study Area, Big Horn and Washakie Counties, Wyoming

Description: Abstract: The Bobcat Draw (WY-010-126) Wilderness Study Area includes about 17,150 acres and is located about 45 mi (miles) by road west of Worland in the Bighorn basin. The arid landscape comprises treeless uplands drained by intermittent streams. No identified resources are in the Bobcat Draw Wilderness Study Area. Most of the area is currently under lease for oil and gas. The study area has a high potential for resources of oil and gas and a high potential for subeconomic resources of deeply buried coal. The potential for a deep-seated geothermal energy resource is moderate. The resource potential for oil shale and metals, including uranium, is low.
Date: 1989
Creator: Gibbons, Anthony B.; Carlson, Robert R.; Kulik, Dolores M. & Lundby, William
Partner: UNT Libraries Government Documents Department

Gravity and Aeromagnetic Studies of the Powder River Basin and Surrounding Areas, Southeastern Montana, Northeastern Wyoming, and Western South Dakota

Description: From abstract: This report contains complete Bouguer anomaly, isostatic residual anomaly, and horizontal gradient anomaly gravity maps of the Powder River Basin and surrounding areas in southeastern Montana, northeastern Wyoming, and western South Dakota were compiled using gravity data from 21,528 stations. A total-intensity anomaly aeromagnetic map with 3 mile spaced east-west flight-lines is also presented. Also included is an analysis of these maps and data, focusing on gravity and aeromagnetic studies.
Date: 1994
Creator: Robbins, Stephen L.
Partner: UNT Libraries Government Documents Department

Uranophane at Silver Cliff Mine, Lusk, Wyoming

Description: Abstract: The uranium deposit at the Silver Cliff mine near Lusk, Wyo., consists primarily of uranophane which occurs as fracture fillings and small replacement pockets in faulted and fractured calcareous sandstone of Cambrian(?) age. The country rock in the vicinity of the mine is schist of pre-Cambrian age intruded by pegmatite dikes and is unconformably overlain by almost horizontal sandstone of Cambrian(?) age. The mine is on the southern end of the Lusk Dome, a local structure probably related to the Hartville uplift. In the immediate vicinity of the mine, the dome is cut by the Silver Cliff fault, a north-trending high-angle reverse fault about 1,200 feet in length with a stratigraphic throw of 70 feet. Uranophane, metatorbernite, pitchblende, calcite, native silver, native copper, chalcocite, azurite, malachite, chrysocolla, and cuprite have been deposited in fractured sandstone. The fault was probably mineralized throughout its length, but because of erosion, the mineralized zone is discontinuous. The principal ore body is about 800 feet long. The width and depth of the mineralized zone are not accurately known but are at least 20 feet and 60 feet respectively. The uranium content of material sampled in the mine ranges from 0.001 to 0.23 percent uranium, whereas dump samples range from 0.076 to 3.39 percent uranium.
Date: 1954
Creator: Wilmarth, Verl R. & Johnson, Donald H.
Partner: UNT Libraries Government Documents Department

Mineral Resources of the Buffalo Hump and Sand Dunes Addition Wilderness Study Areas, Sweetwater County, Wyoming

Description: From abstract: This report is on an investigation of the Buffalo Hump and Sand Dunes Addition Wilderness Study Areas for the purpose determining the resource extraction potential.
Date: 1990
Creator: Gibbons, Anthony B.; Barton, Harlan N.; Kulik, Dolores M. & McDonnell, John R., Jr.
Partner: UNT Libraries Government Documents Department

Mineral Resources of the Ferris Mountains Wilderness Study Area, Carbon County, Wyoming

Description: From abstract: During the present study, all working were examined and representative rock and mineral samples from them were analyzed. Reconnaissance geochemical sampling of rocks, minerals, and stream sediments was conducted for the entire area.
Date: 1988
Creator: Reynolds, Mitchell W. & Neubert, John T.
Partner: UNT Libraries Government Documents Department

Mineral Resources of the Honeycomb Buttes Wilderness Study Area, Fremont and Sweetwater Counties, Wyoming

Description: From summary: This report includes field investigations to evaluate the mineral resource potential of the Honeycomb Buttes were conducted during the summer of 1984. Geologic mapping, geochemical sampling, geophysical surveys, stratigraphic and sedimentological studies, and surveys of prospects delineated areas of very low grade placer gold deposits in terrace gravels and low and moderate resource potential for additional similar undiscovered placer gold deposits, low and moderate resource potential for small uranium deposits, moderate resource potential for accumulation of oil and gas, and low resource potential for coal and oil shale.
Date: 1987
Creator: Patterson, Charles G.; Kulik, D. M.; Loen, Jeffrey S.; Koesterer, M. E. & Scott, David C.
Partner: UNT Libraries Government Documents Department

Mineral Resources of the Sand Dunes Wilderness Study Area, Sweetwater County, Wyoming

Description: From summary: In this report the area studied is referred to as the "wilderness study area" or the "study area". Investigations of mineral occurrences in and near the wilderness study area during 1984 and 1985 indicated high mineral resource potential for undiscovered deposits of coal, moderate potential of oil shale and natural gas, low potential for oil, and identified resources of claystone, shale, and sand.
Date: 1987
Creator: Merewether, E. A.; Kulik, D. M. & Ryan, George S.
Partner: UNT Libraries Government Documents Department

Mineral Resources of the Sweetwater Canyon Wilderness Study Area, Fremont County, Wyoming

Description: From abstract: This report includes field investigations to evaluate the mineral resource potential of the Sweetwater Canyon Wilderness Study Area that were conducted during the summer of 1986.
Date: 1988
Creator: Day, Warren C.; Hill, Randall H.; Kulik, Dolores M.; Scott, David C. & Hausel, W. Dan
Partner: UNT Libraries Government Documents Department