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Libby Creek Group

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Journal Article

Stratigraphy and structure of the lower part of the Precambrian Libby Creek Group, central Medicine Bow Mountains, Wyoming Available to Purchase

R. Lanthier
Published: 01 October 1979
Rocky Mountain Geology (1979) 17 (2): 135–147.
View PDF for article title, Stratigraphy and structure of the lower part of the Precambrian <span class="search-highlight">Libby</span> <span class="search-highlight">Creek</span> <span class="search-highlight">Group</span>, central Medicine Bow Mountains, Wyoming
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Journal Article

Stratigraphy and depositional setting of the Proterozoic Snowy Pass Supergroup, southeastern Wyoming: Record of an early Proterozoic Atlantic-type cratonic margin Available to Purchase

KARL E. KARLSTROM, ANDREW J. FLURKEY, ROBERT S. HOUSTON
Journal: GSA Bulletin
Published: 01 November 1983
GSA Bulletin (1983) 94 (11): 1257–1274.
DOI: https://doi.org/10.1130/0016-7606(1983)94<1257:SADSOT>2.0.CO;2
... gabbro. The 4.5-km-thick lower Libby Creek Group is inferred to be in thrust-fault contact with older units and contains sediments recording transgressions and regressions across a macrotidal delta. This succession is intruded by the 2,000-m.y.-old Gaps Intrusion and comagmatic tholeiitic to weakly...
View PDF for article title, Stratigraphy and depositional setting of the Proterozoic Snowy Pass Supergroup, southeastern Wyoming: Record of an early Proterozoic Atlantic-type cratonic margin
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Journal Article

Stratigraphy of the Belt series in Libby and Trout Creek quadrangles, northwestern Montana and northern Idaho Available to Purchase

RUSSELL GIBSON, W. F. JENKS, IAN CAMPBELL
Journal: GSA Bulletin
Published: 01 March 1941
GSA Bulletin (1941) 52 (3): 363–379.
DOI: https://doi.org/10.1130/GSAB-52-363
...RUSSELL GIBSON; W. F. JENKS; IAN CAMPBELL Abstract Three formations of the Belt series—Prichard, Wallace, and Striped Peak—can be traced northward from the northeastern part of the Coeur d’Alene district, Idaho, through the Trout Creek quadrangle to the northern part of the Libby quadrangle...
View PDF for article title, Stratigraphy of the Belt series in <span class="search-highlight">Libby</span> and Trout <span class="search-highlight">Creek</span> quadrangles, northwestern Montana and northern Idaho
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Journal Article

Characterization of historical amphibole samples from the former vermiculite mine near Libby, Montana, U.S.A Available to Purchase

Matthew S. Sanchez, Mickey E. Gunter, M. Darby Dyar
Published: 01 December 2008
European Journal of Mineralogy (2008) 20 (6): 1043–1053.
DOI: https://doi.org/10.1127/0935-1221/2008/0020-1866
...Matthew S. Sanchez; Mickey E. Gunter; M. Darby Dyar Abstract To determine if the composition or morphology of amphiboles occurring in the Rainy Creek vermiculite deposit near Libby, Montana, has changed as the deposit has been mined over the last 70 years, we assembled amphiboles collected...
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View PDF for article title, Characterization of historical amphibole samples from the former vermiculite mine near <span class="search-highlight">Libby</span>, Montana, U.S.A
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Journal Article

A new view of an old suture zone: Evidence for sinistral transpression in the Cheyenne belt Available to Purchase

W.A. Sullivan, R.J. Beane
Journal: GSA Bulletin
Published: 01 July 2013
GSA Bulletin (2013) 125 (7-8): 1319–1337.
DOI: https://doi.org/10.1130/B30679.1
... Deep Lake Group, which primarily consists of polymictic metaconglomerate and quartzite; (2) the ∼4.4-km-thick lower part of the Libby Creek Group, which primarily consists of quartzite; and (3) the ∼3-km-thick upper part of the Libby Creek Group, which primarily contains metamorphosed dolostone...
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Locations of major ore deposits within the Belt-Purcell Basin area, along with other ore deposits and mineralized trends that are discussed in this issue. Deposit locations are plotted on a geologic map showing the distribution of five stratigraphic units within the Belt-Purcell Basin in the United States and Canada. Lower Belt formations include the Prichard, Altyn, Appekunny, Chamberlain, Newland, LaHood, Table Mountain, and Greyson formations in the United States, and the Aldridge and Fort Steele formations in Canada. Ravalli Group includes the Burke, Revett, St. Regis, Spokane, and Grinnell formations in the United States, and the Creston Formation in Canada. Piegan Group (formerly middle Belt carbonate of Harrison, 1972) includes the lower and middle Wallace Formation and the Helena and Empire formations in the United States, and the Kitchener Formation in Canada. The lower Missoula Group includes the upper Wallace, Snowslip, Shepard, and Purcell Lava formations in the United States, and the Nicol Creek and Van Creek formations in Canada. The upper Missoula Group includes the Striped Peak, Libby, Mount Shields, Bonner, McNamara, Garnet Range, and Pilcher formations in the United States, and the Dutch Creek, Sheppard, Gateway, Phillips, Roosville, and Mount Nelson formations in Canada. Mesoproterozoic strata in east-central Idaho include the Yellowjacket, Hoodoo, Inyo Creek, West Fork, Big Creek, Apple Creek, Gunsight, Swauger, and Lawson Creek formations. Belt-Purcell units in Canada modified from Höy et al. (1995); units in United States adapted from Zientek et al. (2005) and Whipple (1992). Southwestern Montana mafic dike trends from Harlan et al. (2005).

Locations of major ore deposits within the Belt-Purcell Basin area, along w... Available to Purchase

Published: 01 September 2012
Missoula Group includes the upper Wallace, Snowslip, Shepard, and Purcell Lava formations in the United States, and the Nicol Creek and Van Creek formations in Canada. The upper Missoula Group includes the Striped Peak, Libby, Mount Shields, Bonner, McNamara, Garnet Range, and Pilcher formations
Journal Article

Testing the transpression hypothesis in the western part of the Cheyenne belt, Medicine Bow Mountains, southeastern Wyoming Available to Purchase

W. A. Sullivan, R. J. Beane, E. N. Beck, W. H. Fereday, A. M. Roberts-Pierel
Published: 01 January 2011
Rocky Mountain Geology (2011) 46 (2): 111–135.
DOI: https://doi.org/10.2113/gsrocky.46.2.111
..., and metasedimentary rocks are unconformably overlain by the Deep Lake, Lower Libby Creek, and Upper Libby Creek Groups of the Paleoproterozoic Snowy Pass Supergroup (Fig. 1 ) ( Houston et al., 1968 ; Karlstrom et al., 1983 ; Houston and Karlstrom, 1992 ). The Snowy Pass Supergroup is intruded by 2,100–2,000-Ma...
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Journal Article

OPTICAL, COMPOSITIONAL, MORPHOLOGICAL, AND X-RAY DATA ON ELEVEN PARTICLES OF AMPHIBOLE FROM LIBBY, MONTANA, U.S.A. Available to Purchase

Bryan R. Bandli, Mickey E. Gunter, Brendan Twamley, Franklin F. Foit, Jr., Scott B. Cornelius
Published: 01 October 2003
The Canadian Mineralogist (2003) 41 (5): 1241–1253.
DOI: https://doi.org/10.2113/gscanmin.41.5.1241
... near Libby, Montana . Clay Minerals 6 , 283 – 296 . Boettcher , A.L. ( 1967 ): The Rainy Creek alkaline-utramafic igneous complex near Libby, Montana. I. Ultramafic rocks and fenite . J. Geol . 75 , 526 – 553 . Dorling , M. & Zussman , J. ( 1987...
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View PDF for article title, OPTICAL, COMPOSITIONAL, MORPHOLOGICAL, AND X-RAY DATA ON ELEVEN PARTICLES OF AMPHIBOLE FROM <span class="search-highlight">LIBBY</span>, MONTANA, U.S.A.
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Journal Article

Depositional Environment of Middle Carbonate Units of Belt Supergroup, Montana and Idaho Available to Purchase

Gregory E. McKelvey
Journal: AAPG Bulletin
Published: 01 May 1968
AAPG Bulletin (1968) 52 (5): 858–864.
DOI: https://doi.org/10.1306/5D25C46B-16C1-11D7-8645000102C1865D
... (Hobbs et al , 1965). Murray area, Idaho ( Hosterman, 1956 ). Trout Creek and Libby quads., Montana ( Gibson et al ., 1941 ). South slope of the St. Joe Mts., Idaho ( Wagner, 1949 ). St. Regis area, Montana (Wallace and Hosterman, 1956 ). St. Regis-Superior area, Montana ( Campbell...
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View PDF for article title, Depositional Environment of Middle Carbonate Units of Belt Supergroup, Montana and Idaho
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Journal Article

Differentiation of commercial vermiculite based on statistical analysis of bulk chemical data: Fingerprinting vermiculite from Libby, Montana U.S.A. Available to Purchase

Mickey E. Gunter, Eron Singleton, Bryan R. Bandli, Heather A. Lowers, Gregory P. Meeker
Published: 01 April 2005
American Mineralogist (2005) 90 (4): 749–754.
DOI: https://doi.org/10.2138/am.2005.1789
... the garden products. In general, the overall composition of the Libby and South Carolina deposits appeared similar, but differed from the South Africa and China deposits based on simple statistical methods. Cluster analysis provided a good distinction of the four ore types, grouped the four attic samples...
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Journal Article

Amphiboles between the sheets: observations of interesting morphologies by TEM and FESEM Available to Purchase

Mickey E. Gunter, Karen E. Harris, Kristin L. Bunker, Rebecca K. Wyss, Richard J. Lee
Published: 01 December 2008
European Journal of Mineralogy (2008) 20 (6): 1035–1041.
DOI: https://doi.org/10.1127/0935-1221/2008/0020-1872
... samples. References Bandli , B.R. & Gunter , M.E. ( 2006 ): A review of scientific literature examining the mining history, geology, mineralogy, and amphibole asbestos health effects of the Rainy Creek Igneous Complex, Libby, Montana USA . Inhal. Toxicol ., 18 , 949 – 962...
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Journal Article

Differences in Fe-redox for asbestiform and nonasbestiform amphiboles from the former vermiculite mine, near Libby, Montana, U.S.A. Available to Purchase

Mickey E. Gunter, M. Darby Dyar, Antonio Lanzirotti, Jonathan M. Tucker, Elly A. Speicher
Published: 01 August 2011
American Mineralogist (2011) 96 (8-9): 1414–1417.
DOI: https://doi.org/10.2138/am.2011.3800
... , 94 , 1333 – 1340 . Bandli , B.R. and Gunter , M.E. ( 2006 ) A review of scientific literature examining the mining history, geology, mineralogy, and amphibole asbestos health effects of the Rainy Creek Igneous Complex, Libby, Montana USA . Inhalation Toxicology , 18 , 949 – 962...
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View PDF for article title, Differences in Fe-redox for asbestiform and nonasbestiform amphiboles from the former vermiculite mine, near <span class="search-highlight">Libby</span>, Montana, U.S.A.
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Journal Article

The Geology of Asbestos in the United States and Its Practical Applications Available to Purchase

BRADLEY S VAN GOSEN
Published: 01 January 2007
Environmental & Engineering Geoscience (2007) 13 (1): 55–68.
DOI: https://doi.org/10.2113/gseegeosci.13.1.55
... minerals. A notable example of an asbestos-bearing alkaline intrusion is the Rainy Creek Complex near Libby, Montana, the host for a world-class vermiculite deposit that was mined from 1923 to 1990. The Libby (Rainy Creek or Zonolite) vermiculite deposit formed through supergene alteration of the Rainy...
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Journal Article

Composition, Fe 3+ /∑Fe, and crystal structure of non-asbestiform and asbestiform amphiboles from Libby, Montana, U.S.A. Available to Purchase

Mickey E. Gunter, M. Darby Dyar, Brendan Twamley, Franklin F. Foit, Jr., Scott Cornelius
Published: 01 November 2003
American Mineralogist (2003) 88 (11-12): 1970–1978.
DOI: https://doi.org/10.2138/am-2003-11-1240
...-asbestos from the former vermiculite mine at Libby, Montana. M.S. Thesis, University of Idaho. Boettcher, A.L. ( 1966 ) Vermiculite, hydrobiotite, and biotite in the Rainy Creek igneous complex near Libby, Montana. Clay Minerals , 6 , 283 –296. ——— ( 1967 ) The Rainy Creek alkaline-utramafic...
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Journal Article

Amphiboles: Environmental and Health Concerns Available to Purchase

Mickey E. Gunter, Elena Belluso, Annibale Mottana
Published: 01 October 2007
Reviews in Mineralogy and Geochemistry (2007) 67 (1): 453–516.
DOI: https://doi.org/10.2138/rmg.2007.67.12
... been liberated from the sheets. Figure 20. A series of photographs from large to small scale of the former mining operation near Libby, Montana. A) A photograph taken on Rainy Creek road, looking directly east to the top of what is termed locally as Vermiculite Mountain, the location...
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Journal Article

Characterizing the source of potentially asbestos-bearing commercial vermiculite insulation using in situ IR spectroscopy Available to Purchase

Gregg A. Swayze, Heather A. Lowers, William M. Benzel, Roger N. Clark, Rhonda L. Driscoll, Zac S. Perlman, Todd M. Hoefen, M. Darby Dyar
Published: 01 April 2018
American Mineralogist (2018) 103 (4): 517–549.
DOI: https://doi.org/10.2138/am-2018-6022
... collected from Enoree, Libby, Louisa, and Palabora. They used covariance diagrams to separate the unexpanded ore samples into groups based on the chemical composition of individual flakes and found that a diagram of Al/Ti vs. Al/[Mg/(Mg+Fe 2+ )] demonstrated the best separation among the ore sources...
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Journal Article

Tightening the Belt: Paleomagnetic-stratigraphic constraints on deposition, correlation, and deformation of the Middle Proterozoic (ca. 1.4 Ga) Belt-Purcell Supergroup, United States and Canada Available to Purchase

D.P. Elston, R.J. Enkin, J. Baker, D.K. Kisilevsky
Journal: GSA Bulletin
Published: 01 May 2002
GSA Bulletin (2002) 114 (5): 619–638.
DOI: https://doi.org/10.1130/0016-7606(2002)114<0619:TTBPSC>2.0.CO;2
... near the base of the Libby Formation, toward the top of the Belt-Purcell succession at the town of Libby, Montana; the ash has provided a 1401 ± 6 Ma age (zircon). Belt-Purcell sedimentation is thought to predate intrusion of the Hellroaring Creek Stock near Kimberley, British Columbia, dated at 1365...
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View PDF for article title, Tightening the Belt: Paleomagnetic-stratigraphic constraints on deposition, correlation, and deformation of the Middle Proterozoic (ca. 1.4 Ga) Belt-Purcell Supergroup, United States and Canada
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Journal Article

Site occupancy in richterite-winchite from Libby, Montana, USA, by FTIR spectroscopy Available to Purchase

G. Iezzi, G. Della Ventura, F. Bellatreccia, S. Lo Mastro, B. R. Bandli, M. E. Gunter
Published: 01 February 2007
Mineralogical Magazine (2007) 71 (1): 93–104.
DOI: https://doi.org/10.1180/minmag.2007.071.1.93
... Mg 5 T Si 8 O 22 (OH) 2 ( Leake et al. , 2004 ). In this study we analysed the same suite of samples collected by MEG in 1999 and used by Gunter et al. (2003) and Bandli et al. (2003) . They were grouped by geological occurrence and all come from the former vermiculite quarry near Libby...
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Simplified maps showing a summarized evolution of the foreland basin system in northwest Montana, based on a number of sources discussed in the text and data from this paper. (A) Late Jurassic, showing the potential configuration during deposition of the Morrison Formation. The initial foreland basin was established earlier during the Bajocian, with deposition of the Ellis Group. Area enclosed by dashed line in southeast corner of map shows approximate position of the Belt Island during the Middle Jurassic (from Parcell and Williams, 2005). The position of the forebulge is conjectural. Structure of the Kootenay and Quesnell terranes is not interpreted. (B) Aptian–early Albian, during deposition of the Kootenai Formation. (C) Albian–Santonian, during deposition of the Colorado Group. Map represents dominant environments during this time; coastal positions varied during this time. (D) Campanian–early Eocene, during deposition of the Two Medicine–Wasatch interval. Map does not display the late Campanian marine deposits of the Bearpaw Shale and Horsethief Sandstone. Major thrusts show possible location before pre-Cenozoic extension. LEDSH thrust system shows its potential pre-erosion position. Sawtooth Range is represented by a single thrust in the map, but includes a complexly deformed imbricated system. Forebulge represents its location during the mid-Campanian, although it actively migrated during this time (Catuneanu, 2004). In all figures, the locations of the early Eocene thrust belt front and intraforeland highs are shown as a spatial reference. Location of thrusts in dotted lines is conjectural; dashed lines indicate incipient movement. Only prevalent sedimentary environments are shown. Thrusts key: SM—St. Mary, HL—Hall Lake, M—Moyie, HC—Hawley Creek, CA—Cabin, S—Snowshoe, L—Libby, P—Pinkham, WW—Wigwam-Whitefish, LEDSH—Lewis-Eldorado-Steinbach-Hoadley, Lo-E—Lombard-Eldorado, SR—Sawtooth Range imbricate. Lewis and Clark strike-slip system is simplified as a single line.

Simplified maps showing a summarized evolution of the foreland basin system... Available to Purchase

Published: 01 March 2011
foreland basin was established earlier during the Bajocian, with deposition of the Ellis Group. Area enclosed by dashed line in southeast corner of map shows approximate position of the Belt Island during the Middle Jurassic (from Parcell and Williams, 2005 ). The position of the forebulge is conjectural
Journal Article

Three-Dimensional Trend Mapping Using Gamma-Ray Well Logs: Simpson Group, South-Central Kansas Available to Purchase

J. H. Doveton, Zhu Ke-an, J. C. Davis
Journal: AAPG Bulletin
Published: 01 June 1984
AAPG Bulletin (1984) 68 (6): 690–703.
DOI: https://doi.org/10.1306/AD46136D-16F7-11D7-8645000102C1865D
... plain : AAPG Bulletin , v. 38 , p. 2476 - 2499 . Ireland , H. A. , 1965 , Regional depositional basin and correlations of Simpson Group : Tulsa Geological Society Digest , v. 33 , p. 74 - 89 . Krumbein , W. C. , and W. G. Libby , 1957 , Application of moments to vertical...
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