Mineral Deposit Data for Epigenetic Base- and Precious-metal and Uranium-thorium Deposits in South-central and Southwestern Montana and Southern and Central Idaho

Klein, Terry L.

doi:10.3133/ofr20041005

Cited by 4 publications

(10 citation statements)

References 10 publications

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“…Similar age and composition igneous rocks to the north and northeast of the trend of the miogeocline are mostly barren. The pluton-related and volcanichosted deposit types in the trend of the miogeocline include polymetallic vein ± W; replacement Pb-Ag ± Ba; distal disseminated Au; and epithermal Au, Hg, and Sb deposits (Kiilsgaard et al, 1986;Ruppel and Lopez, 1988;Klein, 2004). Northwest-striking linear aeromagnetic anomalies [North America Magnetic Anomaly Group (NAMAG), 2002] correlate with several of the northwest-striking central Idaho mineral belts.…”

Section: Eastern Washington-eastern Idahomentioning

confidence: 97%

“…However, there are many base and precious metal mineral deposits within Cretaceous and Eocene igneous rocks. Regionwide studies of mineral-deposit occurrences (disregarding Mesoproterozoic sediment-hosted and Coeur d'Alene deposits) in western Montana and central and northern Idaho show that although many important igneous-rock related mineral deposits are along the mostly unexposed, broad, northeast-striking Paleoproterozoic Great Falls tectonic zone in the basement (O'Neill and Lopez, 1985;Klein, 2004;O'Neill et al, 2007;Klein and Sims, 2007), there are also many additional epigenetic deposit occurrences that extend northwest across central Idaho (Albers, 1983;Klein, 2004;Klein and Sims, 2007) along the projected northwest trend of the Laurentian margin (Fig. 5).…”

Section: Eastern Washington-eastern Idahomentioning

confidence: 98%

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Geometry of the Neoproterozoic and Paleozoic rift margin of western Laurentia: Implications for mineral deposit settings

2008

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The U.S. and Canadian Cordilleran miogeocline evolved during several phases of Cryogenian-Devonian intracontinental rifting that formed the western margin of Laurentia. Recent fi eld and dating studies across central Idaho and northern Nevada result in identifi cation of two segments of the rift margin. Resulting interpretations of rift geometry in the northern U.S. Cordillera are compatible with interpretations of northweststriking asymmetric extensional segments subdivided by northeast-striking transform and transfer segments. The new interpretation permits integration of miogeoclinal segments along the length of the western North American Cordillera. For the U.S. Cordillera, miogeoclinal segments include the St. Mary-Moyie transform, eastern Washingtoneastern Idaho upper-plate margin, Snake River transfer, Nevada-Utah lower-plate margin, and Mina transfer. The rift is orthogonal to most older basement domains, but the location of the transform-transfer zones suggests control of them by basement domain boundaries. The zigzag geometry of reentrants and promontories along the rift is paralleled by salients and recesses in younger thrust belts and by segmentation of younger extensional domains. Likewise, transform-transfer zones localized subsequent transcurrent structures and igneous activity. Sediment-hosted mineral deposits trace the same zigzag geometry along the margin. Sedimentary exhalative (sedex) Zn-Pb-Ag ± Au and barite mineral deposits formed in continental-slope rocks during the Late Devonian-Mississippian and to a lesser degree, during the Cambrian-Early Ordovician. Such deposits formed during episodes of renewed extension along miogeoclinal segments. Carbonate-hosted Mississippi Valleytype (MVT) Zn-Pb deposits formed in structurally reactivated continental shelf rocks during the Late Devonian-Mississippian and Mesozoic due to reactivation of preexisting structures. The distribution and abundance of sedex and MVT deposits are controlled by the polarity and kinematics of the rift segment. Locally, discrete mineral belts parallel secondary structures such as rotated crustal blocks at depth that produced sedimentary subbasins and conduits for hydrothermal fl uids. Where the miogeocline was overprinted by Mesozoic and Cenozoic deformation and magmatism, igneous rock-related mineral deposits are common.

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Section: Eastern Washington-eastern Idahomentioning

confidence: 97%

Section: Eastern Washington-eastern Idahomentioning

confidence: 98%

Geometry of the Neoproterozoic and Paleozoic rift margin of western Laurentia: Implications for mineral deposit settings

2008

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“…Known skarn mineralization exists at the Copper Basin (Reed and Davidson) mine, and the nearby Anderson and Rosenkranze prospects (Mitchell, 1999;Klein, 2004;U.S. Geological Survey, 2005).…”

Section: Blue Jaymentioning

confidence: 99%

“…The Champagne tract overlaps the north end of the Lava Creek mineralized area as categorized in Klein (2004) and the northern extension of a hot springs gold-silver mineral resource tract as shown in Box and others (1995).…”

Section: Resource Assessment Tractsmentioning

confidence: 99%

Geology and mineral resources of the North-Central Idaho Sagebrush Focal Area: Chapter C in <em>Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming</em>

Mauk¹,

Zientek²,

Hearn³

et al. 2016

Scientific Investigations Report

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov or call 1-888 -ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://store.usgs.gov.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Lund, K., Zürcher, L., Hofstra, A.H., Van Gosen, B.S., Benson, M.E., Box, S.E., Anderson, E.D., Bleiwas, D.I., DeAngelo, J., Drake, R.M., II, Fernette, G.L., Giles, S.A., Glen, J.M.G., Haacke, J.E., Horton, J., John, D.M., Robinson, G.R., Jr., Rockwell, B.W., San Juan, C.A., Shaffer, B.N., Smith, S.M., and Williams, C.F., 2016, Geology and mineral resources of the North-Central Idaho Sagebrush Focal Area (ver. 1.1, October 27, 2016): U.S. Geological Survey Scientific Investigations Report 2016-5089 -C, 147 p., http://dx.doi.org/10.3133/sir20165089C. Supplemental InformationTemperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as°F = (1.8 × °C) + 32.Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as°C = (°F -32) / 1.8. DatumsVertical coordinate information is referenced to the North American Datum of 1983 (NAD 83). Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).Altitude, as used in this report, refers to distance above the vertical datum. Executive SummaryThe U.S. Department of the Interior has proposed to withdraw approximately 10 million acres of Federal lands from mineral entry (subject to valid existing rights) from 12 million acres of lands defined as Sagebrush Focal Areas (SFAs) in Idaho, Montana, Nevada, Oregon, Utah, and Wyoming (for further discussion on the lands involved see Day and others, 2016).The purpose of the proposed action is to protect the greater sage-grouse (Centrocercus urophasianus) and its habitat from potential adverse affects of locatable mineral exploration and mining. To inform the decision on whether to withdraw the SFAs from mineral entry, the Bureau of Land Management (BLM) requires a mineral-resource assessment be completed to identify mineral resources within the proposed area of withdrawal. The USGS Sagebrush Mineral-Resource Assessment (SaMiRA) project was initiated in November 2015 and supported by the BLM to (1) assess locatable mineral-resource potential and (2) to describe leasable and salable mineral resources for the seven SFAs and Nevada additions. Geologic SettingThe purpose of this chapter is to document the geology and mineral resources of the North-Central Idaho Sagebrush Focal Area ("study area"), which extends from east-central to south-central Idaho. The geologically complex ar...

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“…In particular, this is one of several reports prepared to address USFS needs for science information as forest management plans are revised in the Northern Rocky Mountains (Zientek and Kropschot, 2005). The results of mineral resource assessments will be used in conjunction with mineral deposit (Spanski, 2001;Klein, 2004, Spanski, 2004 and mining claim information (Causey, 2005) to indicate where minerals-related activities might take place in the near future.…”

Section: Introductionmentioning

confidence: 99%

A compilation of spatial digital databases for selected U.S. Geological Survey nonfuel mineral resource assessments for parts of Idaho and Montana

Carlson¹,

Zientek²,

Causey³

et al. 2007

Open-File Report

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This report compiles selected results from 13 U.S. Geological Survey (USGS) mineral resource assessment studies conducted in Idaho and Montana into consistent spatial databases that can be used in a geographic information system. The 183 spatial databases represent areas of mineral potential delineated in these studies and include attributes on mineral deposit type, level of mineral potential, certainty, and a reference. The assessments were conducted for five 1° x 2° quadrangles (Butte, Challis, Choteau, Dillon, and Wallace), several U.S. Forest Service (USFS) National Forests (including Challis, Custer, Gallatin, Helena, and Payette), and one Bureau of Land Management (BLM) Resource Area (Dillon). The data contained in the spatial databases are based on published information: no new interpretations are made. This digital compilation is part of an ongoing effort to provide mineral resource information formatted for use in spatial analysis. In particular, this is one of several reports prepared to address USFS needs for science information as forest management plans are revised in the Northern Rocky Mountains.

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Mineral Deposit Data for Epigenetic Base- and Precious-metal and Uranium-thorium Deposits in South-central and Southwestern Montana and Southern and Central Idaho

Cited by 4 publications

References 10 publications

Geometry of the Neoproterozoic and Paleozoic rift margin of western Laurentia: Implications for mineral deposit settings

Geometry of the Neoproterozoic and Paleozoic rift margin of western Laurentia: Implications for mineral deposit settings

Geology and mineral resources of the North-Central Idaho Sagebrush Focal Area: Chapter C in <em>Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming</em>

A compilation of spatial digital databases for selected U.S. Geological Survey nonfuel mineral resource assessments for parts of Idaho and Montana

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