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Hobart Butte

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Journal Article
Published: 01 April 1945
Journal of Sedimentary Research (1945) 15 (1): 25–33.
...Victor Thomas Allen; Robert Leslie Nichols Abstract Ovate pellets of kaolinite from .05 to 15 millimeters in length occur in conglomerates interbedded with pyroclastic materials and waterlaid sediments in the Eocene Calapooya formation at Hobart Butte, Oregon. Although Miocene hydrothermal...
Journal Article
Published: 01 January 1943
American Mineralogist (1943) 28 (1): 55–57.
...Reynolds M. Denning Abstract Hobart Butte is located in Lane County, Oregon, about two and a half miles northwest of Blackbutte Mine Postoffice. The upper part of the hill is composed largely of an altered andesite tuff, which is quarried for the clay it contains. It is in this quarry...
Journal Article
Journal: GSA Bulletin
Published: 01 July 2004
GSA Bulletin (2004) 116 (7-8): 817–839.
..., and paleomagnetic stratigraphy of these tuffs and rocks now allow dating of local fossil floras. The Comstock, Goshen, Rujada, and Willamette floras have been widely used as evidence for Eocene-Oligocene climatic cooling and drying. Eocene leaves from Comstock and Hobart Butte included such thermophilic taxa...
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Journal Article
Published: 01 April 1948
American Mineralogist (1948) 33 (3-4): 122–134.
...Victor T. Allen; Joseph J. Fahey; Joseph M. Axelrod Abstract The name mansfieldite is given to a new mineral having the formula A1 2 O 3 . As 2 O 6 4H 2 O, the aluminum analogue of scorodite. It occurs at Hobart Butte, Lane County, Oregon, and together with intermediate members near the iron end...
Journal Article
Journal: Economic Geology
Published: 01 March 1946
Economic Geology (1946) 41 (2): 124–138.
...., Hobart Butte and Mollala, Oreg., where the Geological Survey has been investigating clays jointly with the Bureau of Mines, U. S. Department of the Interior, high-alumina clays formed by sedimentary processes are more important than those formed by all phases of volcanic activity. Clays derived directly...
Journal Article
Published: 01 June 2016
American Mineralogist (2016) 101 (6): 1321–1331.
... and related to the removal of Mg and Si and transportation and precipitation of various Ni-bearing minerals (e.g., Butt and Cluzel 2013 ; Elias 2002 ). In recent decades, a new class of Ni deposits—hydrothermal Ni sulfide—has received much attention, culminating in a special issue of Ore Geology...
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Journal Article
Journal: Economic Geology
Published: 01 January 2018
Economic Geology (2018) 113 (1): 7–38.
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Journal Article
Published: 01 January 2015
American Mineralogist (2015) 100 (1): 26–34.
...) , Fleet and Mumin (1997) , Craig et al. (1998) , and Den Besten et al. (1999) . Importantly, one can easily construe regions within sulfide ores where p - and n -type materials butt one another forming p-n micro-junctions. Indeed, impurity segregation in zoned pyrites resulting in neighboring p...
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Journal Article
Published: 01 January 2013
American Mineralogist (2013) 98 (1): 98–109.
... reveals complex growth histories in veins from the Butte porphyry copper deposit, Montana . Geology , 30 , 727 – 730 . Rusk B.G. Lowers H.A. Reed M.H. ( 2008 ) Trace elements in hydrothermal quartz: Relationships to cathodoluminescent textures and insights into vein formation...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2014
GSA Bulletin (2014) 126 (3-4): 352–376.
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Journal Article
Journal: Economic Geology
Published: 01 August 2005
Economic Geology (2005) 100 (5): 835–862.
... are characterized by zones of advanced argillic alteration superimposed directly onto K silicate altered rocks. The best documented example occurs at Chuquicamata, where structurally controlled phyllic and advanced argillic alteration assemblages associated with Butte-style Cu-Ag veins ( Sillitoe, 2000 ; Ossandon...
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Journal Article
Journal: Economic Geology
Published: 01 August 2021
Economic Geology (2021) 116 (5): 1189–1207.
... in propylitic alteration is also recorded in other porphyry Cu deposit systems, such as Bingham ( Bowman et al., 1987 ) and Butte ( Reed et al., 2013 ). On the other hand, due to much slower diffusion of Y, REEs, U, and Th in apatite ( Cherniak, 2010 ), the replacement apatite commonly retains the original...
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Journal Article
Journal: Economic Geology
Published: 01 August 2005
Economic Geology (2005) 100 (5): 801–818.
... 244.7 1 4 Butte Montana 61 5.23 0.67 35.11 0.03 1.44 0.042 217.0 2, 3, 4, 5 5 La Escondida Northern Chile 38 2.26 1.15 32.49 0.021 0.48 0.19 429.8 1,3 6 Cananea Mexico 58 7.14 0.42 30.00 0.01 0.57 0.012 82.0 3, 6, 7 7 Bingham Utah 38.8 3.23 0.88 28.46...
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Journal Article
Journal: Economic Geology
Published: 01 June 2020
Economic Geology (2020) 115 (4): 701–727.
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Journal Article
Journal: Economic Geology
Published: 01 March 2015
Economic Geology (2015) 110 (2): 557–574.
..., deep, pre-Main Stage porphyry Cu-Mo and late Main Stage base-metal mineral deposits, Butte district, Montana : Chemical Geology , v. 215 , p. 61 – 93 . Frei R. , 1995 , Evolution of mineralizing fluid in the porphyry copper system of the Skouries deposit, Northeast Chalkidiki (Greece...
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Journal Article
Journal: Economic Geology
Published: 01 December 2011
Economic Geology (2011) 106 (8): 1279–1315.
... and portable infrared mineral analyzer (PIMA) analyses at the University of Tasmania, and zeolites by X-ray diffraction analyses (XRD) of powdered whole-rock samples and mineral separates at Mineral Resources Tasmania, Hobart. High gold grades are associated with irregular massive dikes of stage 2D bornite...
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Series: SEPM Special Publication, SEPM Special Publication
Published: 01 January 2007
DOI: 10.2110/pec.07.86.0037
EISBN: 9781565762947
.... Despite the presence of the Paleoproterozoic Boehls Butte anorthosite in the area, we found no support for presence of Belt basement south of it. The complexity of metasedimentary rocks in this region cannot be resolved with field mapping alone. Detrital–zircon studies help to provide important...
Journal Article
Published: 01 August 2005
Geochemistry: Exploration, Environment, Analysis (2005) 5 (3): 267–277.
... discussed by Gedeon & Butt (1977); Sulcek & Povdorova (1989) , . For the solubility of individual minerals the reader is referred to Dana & Ford (1966); Jackson (1956); Tröger (1979) , , and in particular Duda & Rejl (1986) . Technical information on how to deal with insoluble residues...
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Journal Article
Published: 09 March 2016
Journal of the Geological Society (2016) 173 (4): 701–710.
... al. 2015 ). The only described pyroclastic flow deposits in association with monogenetic phreatomagmatic activity are the lower Teshim maar deposits, Hopi Buttes Volcanic Field, Arizona ( White 1991 ), and the Peperino Albano ignimbrite, Colli Albano Volcano, Italy ( Giordano et al. 2002...
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Journal Article
Published: 01 June 2020
American Mineralogist (2020) 105 (6): 945–954.
... in Mineralogy and Geochemistry , 70 , 87 – 124 . Rusk , B.G. , and Reed , M.H. ( 2002 ) Scanning electron microscope–cathodoluminescence analysis of quartz reveals complex growth histories in veins from the Butte porphyry copper deposit, Montana . Geology , 30 , 727 – 730 . Rusk...
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