Principal facts and complete Bouguer gravity anomaly map for the west half of the Butte 1° x 2 ° quadrangle, Montana

Hassemer, Jerry H.

doi:10.3133/ofr81949

Cited by 3 publications

(6 citation statements)

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“…Samples of native gold were collected and analyzed as part of the geochemical studies (Campbell, Nowlan, and Antweiler, 1982). A gravity survey was conducted during 1980--1982 (Hassemer, 1981(Hassemer, , 1984a(Hassemer, , 1984b(Hassemer, , 1986 and an aeromagnetic survey for the entire quadrangle was completed during 1983 (U.S. Geological Survey, 1984). Audiomagnetotelluric surveys were done in 1981 at selected sites in the quadrangle (Hoover and others, 1982).…”

Section: Present Investigationsmentioning

confidence: 99%

“…The results of these surveys are in figures and plates accompanied by an explanatory text in U.S. Geological Survey Map I-2050-I (Hanna and others, in press). The gravity survey consisted of 2,325 observations within and directly adjacent to the quadrangle (Hassemer, 1981;1984a;1984b;, of which 1 ,900 are new, 262 were made previously by the USGS, and 163 were obtained from nonproprietary data files of the Department of Defense. All gravity data were obtained using high-precision Lacoste and Romberg geodetic gravimeters.…”

Section: Gravity and Magnetic Anomaly Map (I-2050-i)mentioning

confidence: 99%

“…"Publications of tbe Geological Survey, 1962-1970" may be purchased by mail and over the counter in paperback book form and as a set of microfiche. "Publications oftbe U.S. Geological Survey, 1971-1981" may be purchased by mail and over the counter in paperback ~k form (two volumes, publications listing and index) and as a set of nucrofi.che. Supplements for 1982Supplements for , 1983Supplements for ,' 1984Supplements for , 1985Supplements for , 1986, and for su~ quent years since the last permanent catalog may be purchased by mail and over the counter in paperback book form.…”

Section: Selected Series Of Us Geological Survey Publications Periomentioning

confidence: 99%

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The Conterminous United States Mineral Assessment Program; background information to accompany folio of geologic, geochemical, remote sensing, and mineral resources maps of the Butte 1 degree x 2 degrees Quadrangle, Montana

Elliott¹,

Trautwein²,

Wallace³

et al. 1993

Circular

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The Butte 1 °X2° quadrangle in west-central Montana was investigated as part of the U.S. Geological Survey's Conterminous United States Mineral Assessment Program (CUSMAP). These investigations included geologic mapping, geochemical surveys, gravity and aeromagnetic surveys, examinations of mineral deposits, and specialized geochronologic and remote-sensing studies. The data collected during these studies were compiled, combined with available published and unpublished data, analyzed, and used in a mineral-resource assessment of the quadrangle. The results, including data, interpretations, and mineralresource assessments for nine types of mineral deposits, are published separately as a folio of maps. These maps are accompanied by figures, tables, and explanatory text. This circular provides background information on the Butte quadrangle, summarizes the studies and published maps, and lists a selected bibliography of references pertinent to the geology, geochemistry, geophysics, and mineral resources of the quadrangle. The Butte quadrangle, which includes the worldfamous Butte mining district, has a long history of mineral production. Many mining districts within the quadrangle have produced large quantities of many commodities; the most important in dollar value of production were copper, gold, silver, lead, zinc, manganese, molybdenum, and phosphate. At present, mines at several locations produce copper, molybdenum, gold, silver, lead, zinc, and phosphate. Exploration, mainly for gold, has indicated the presence of other mineral deposits that may be exploited in the future. The results of the investigations by the U.S. Geological Survey indicate that many areas of the quadrangle are highly favorable for the occurrence of additional undiscovered resources of gold, silver, copper, molybdenum, tungsten, and other metals in several deposit types.

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Section: Present Investigationsmentioning

confidence: 99%

Section: Gravity and Magnetic Anomaly Map (I-2050-i)mentioning

confidence: 99%

Section: Selected Series Of Us Geological Survey Publications Periomentioning

confidence: 99%

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The Conterminous United States Mineral Assessment Program; background information to accompany folio of geologic, geochemical, remote sensing, and mineral resources maps of the Butte 1 degree x 2 degrees Quadrangle, Montana

Elliott¹,

Trautwein²,

Wallace³

et al. 1993

Circular

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show abstract

“…These data agree to within a few tens of gammas with reconnaissance data acquired by the U.S. Department of Energy (Texas Instruments, Inc., 1979). Gravity readings were taken at 71 sites in and adjacent to the wilderness; figure 3 is a complete Bouguer gravity anomaly map for this data using a density of 2.67 g/cm (Hassemer, 1981). The scale of the geophysical investigations is not adequate for detailed investigations of mineralization.…”

Section: Geophysicsmentioning

confidence: 99%

“…Most of the geochemical sampling was done in 1979, with additional sampling in 1982 by J. C. Antweiler, W. L. Campbell, and G. K. Lee (Campbell and others, 1983). Geophysical investigations were done by J. H. Hassemer and W. F. Hanna (Hassemer, 1981). Investigations of mines and prospects were conducted during 1980 by T. J.…”

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confidence: 99%

Mineral resource potential map of the Welcome Creek Wilderness, Granite County, Montana

Lidke¹,

Wallace²,

Antweiler³

et al. 1983

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Mineral resource potential map of the Sapphire Wilderness Study Area and contiguous roadless areas, Granite and Ravalli Counties, Montana

Wallace¹,

Lidke²,

Elliott³

et al. 1984

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Under the provisions of the Wilderness Act (Public Law 88-577, September 3, 1964) and related acts, the U.S. Geological Survey and the U.S. Bureau of Mines have been conducting mineral surveys of wilderness and primitive areas. Areas officially designated as "wilderness," "wild," or "canoe" when the act was passed were incorporated into the National Wilderness Preservation System, and some of them are presently being studied. The act provided that areas under consideration for wilderness designation should be studied for suitability for incorporation into the Wilderness System. The mineral surveys constitute one aspect of the suitability studies. The act directs that the results of such surveys are to be made available to the public and be submitted to the President and the Congress. This report discusses the results of a mineral survey of the Sapphire Wilderness Study Area and contiguous roadless areas, Deerlodge and Bitterroot National Forests, Granite and Ravalli Counties, Mont. The Sapphire Wilderness Study Area was established by Public Law 95-150, November 1977, and contiguous roadless areas (01421) were classified as further planning areas during the Second Roadless Area Review and Evaluation (RARE E) by the U.S. Forest Service, January 1979. MINERAL RESOURCE POTENTIAL SUMMARY STATEMENT Some areas in the Sapphire Wilderness Study Area and contiguous roadless areas, Granite and Ravalli Counties, Mont., hereafter referred to as the "study area," contain identified mineral resources and have a high potential for the occurrence of base-and precious-metal resources in small deposits that contain gold, silver, copper, lead, zinc, and molybdenum. Most areas of high potential are in the southern part of the Sapphire batholith in the Frogpond Basin region, where granodiorite is in contact with metasedimentary rocks of the middle and upper Belt Supergroup. Identified resources occur at the Lutz, Millers, and Kent mines, and at the Log Cabin and O'Brien prospects. Recorded mineral production in the study area is 1,103 oz of gold, 4,352 oz of silver, 2,409 Ib of copper, 83,715 Ib of lead, and 22,39? lb of zinc. Other areas adjacent to the study area have either a high or moderate potential for the occurrence of base-and precious-metal resources in small deposits; the Banner and Senate mines occur in these areas.Associated with many vein occurrences are areas having potential for gold placers derived from mineralized veins. One area in Frogpond Basin contains an identified resource of gold in a low-grade placer. Most other areas having potential for gold placers are classified as having high or moderate potential for the occurrence of lowgrade gold resources, and most of these areas are in the southern part of the study area. There is a high potential for the occurrence of a small molybdenum resource near the east border of the study area. Small areas that contain sulfide-bearing veins occur locally in the study area, and, in general, geochemical data from these areas show anomalously high amounts of base and precious ...

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Principal facts and complete Bouguer gravity anomaly map for the west half of the Butte 1° x 2 ° quadrangle, Montana

Cited by 3 publications

References 0 publications

The Conterminous United States Mineral Assessment Program; background information to accompany folio of geologic, geochemical, remote sensing, and mineral resources maps of the Butte 1 degree x 2 degrees Quadrangle, Montana

The Conterminous United States Mineral Assessment Program; background information to accompany folio of geologic, geochemical, remote sensing, and mineral resources maps of the Butte 1 degree x 2 degrees Quadrangle, Montana

Mineral resource potential map of the Welcome Creek Wilderness, Granite County, Montana

Mineral resource potential map of the Sapphire Wilderness Study Area and contiguous roadless areas, Granite and Ravalli Counties, Montana

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