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Mount Ethel Pluton

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Journal Article
Published: 01 January 1999
Rocky Mountain Geology (1999) 34 (1): 21-35.
...M. F. Barinek; C. T. Foster; P. P. Chaplinsky Abstract The ∼1.4-Ga Mount Ethel pluton is a northeast-trending elliptical body of granodiorite to quartz monzonite surrounded by Lower Proterozoic (1.8–1.7 Ga) rocks in the Park Range, northeast of Steamboat Springs, Colorado. The contact along...
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Geologic map of the ∼1.4-Ga <b>Mount</b> <b>Ethel</b> <b>pluton</b>, northern Park Range, Colora...
Published: 01 January 1999
Figure 2. Geologic map of the ∼1.4-Ga Mount Ethel pluton, northern Park Range, Colorado (after Snyder, 1978 ). Note the Soda Creek-Fish Creek shear zone and porphyry dikes. Locations of samples used in thermobarometry calculations are shown by numerals next to an asterisk ( * ).
Journal Article
Published: 01 January 1999
Rocky Mountain Geology (1999) 34 (1): 7-20.
... of the sedimentary sequence consists of a medium- to coarse-grained, cross-bedded quartzite. The supracrustal rocks are intruded by plutonic rocks with compositions from gabbro to granite and ages of 1.78 to 1.735 Ga. The youngest Proterozoic unit in the area is the ∼1.4-Ga Mount Ethel pluton. Upper amphibolite...
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Timing of deformation, metamorphism, and intrusion. Solid lines indicate we...
Published: 01 January 1999
Figure 10. Timing of deformation, metamorphism, and intrusion. Solid lines indicate well-constrained events, dashed lines indicate poorly constrained relationships. Xgn/Xs = Lower Proterozoic volcanic and sedimentary rocks. BP = Buffalo Pass pluton (∼1.75 Ga). ME = Mount Ethel pluton (∼1.4 Ga).
Journal Article
Journal: Economic Geology
Published: 01 September 2006
Economic Geology (2006) 101 (6): 1117-1157.
..., and 0.50 to 0.35 Ga. The 1.69 to 1.58 Ga event, which accounts for over 65 percent of Australia’s Zn, was triggered by accretion and rifting along the southern margin of Rodinia. Over 93 percent of Australia’s Zn-Pb-Ag resources were produced by four ore-forming system types: Mount Isa (56% of Zn), Broken...
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Trace element ratios of ∼1.4-Ga rocks. Weight percent SiO 2  plotted agains...
Published: 01 January 1999
Figure 4. Trace element ratios of ∼1.4-Ga rocks. Weight percent SiO 2 plotted against A , La/Nb and B , La/Zr for the ∼1.4-Ga Mount Ethel pluton (filled diamonds) and spatially related porphyry dikes (open triangles). Numbers identify analyzed samples.
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Map of southern Wyoming and northern Colorado showing Cheyenne belt, Green ...
Published: 01 January 1999
Figure 1. Map of southern Wyoming and northern Colorado showing Cheyenne belt, Green Mountain, Farwell Mountain, Zinc Mountain, Lester Mountain, Mica Basin, Mount Ethel pluton, Soda Creek-Fish Creek shear zone, Rabbit Ears Pass, and the proposed seismic line.
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Variation diagrams.   A  , FeO/(FeO + MgO) plotted against weight percent S...
Published: 01 January 1999
Figure 3. Variation diagrams. A , FeO/(FeO + MgO) plotted against weight percent SiO 2 ; and B , weight percent K 2 O plotted against weight percent SiO 2 for the ∼1.4-Ga Mount Ethel pluton (filled diamonds) and spatially related porphyry dikes (open triangles). New analyses performed
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Garnet–biotite and garnet–plagioclase–muscovite–biotite isopleths for speci...
Published: 01 January 1999
Figure 8. Garnet–biotite and garnet–plagioclase–muscovite–biotite isopleths for specimens from metapelites around the Mount Ethel pluton. A , M 1 garnet cores; B , M 2 garnet cores, and C , M 1 and M 2 garnet rims. Calculated using GTB 1.9 ( Kohn and Spear, 1994 ). Squares
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Temperature versus distance diagrams for M 1  and M 2  garnets. The three p...
Published: 01 January 1999
margin of the ∼1.4-Ga Mount Ethel pluton ( C ). Inferred gradients are shown by solid lines. Multiple symbols are for several garnet-biotite pairs in same rock.
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Equal-area, lower hemisphere projections of poles to foliations and stretch...
Published: 01 January 1999
Figure 5. Equal-area, lower hemisphere projections of poles to foliations and stretching lineations. Squares are data compiled from foliations shown in country rock north and south of Mount Ethel pluton/FC–SC shear zone region on the maps of Snyder (1980b , c ). Note how predominant fabric
Journal Article
Published: 01 January 2003
Rocky Mountain Geology (2003) 38 (2): 183-204.
... to the peak of the shear activity. Contemporaneity of northeast shearing and granite magmatism has been demonstrated also in other parts of the Colorado province. In the northern Park Range ( Fig. 1 ), Barinek et al. (1999) have shown that the ∼1.4-Ga Mt. Ethel pluton was intruded along the Soda Creek–Fish...
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Journal Article
Published: 01 January 2005
Rocky Mountain Geology (2005) 40 (2): 115-155.
... is represented by small bodies of coarse-grained quartz diorite. The second Mesoproterozoic event is represented by the strongly porphyritic granodiorite of the Hagues Peak pluton. The third and final Mesoproterozoic igneous event in the area produced widespread bodies of equigranular “Silver-Plume-type...
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Highly generalized geologic map of the Soda Creek–Fish Creek shear zone (SC...
Published: 01 December 2015
alluvium, colluvium, and glacial deposits; Qa—Quaternary alluvium, colluvium, and glacial deposits; Xbp—1746 ± 6 Ma Buffalo Pass pluton ( Premo and Van Schmus, 1989 ); Xm—undifferentiated Paleoproterozoic metamorphic rocks; Yme—ca. 1.42 Ga Mount Ethel pluton ( Snyder, 1980 ). Structural symbols: S 1
Journal Article
Published: 01 January 1999
Rocky Mountain Geology (1999) 34 (1): 1-4.
... during emplacement of the 1.4-Ga Mount Ethel pluton, and thus has a polyphase movement history. 15 12 1998 11 12 1998 UW Department of Geology and Geophysics 1999 The paper by Shaw and Karlstrom summarizes present knowledge of the long-proposed boundary between the Yavapai...
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Journal Article
Published: 01 January 2013
Rocky Mountain Geology (2013) 48 (1): 15-39.
... Paleoproterozoic fabrics and involved development of mylonite, pseudotachylyte, and cataclasites. Barinek et al. (1999) showed that these younger fabrics overlap with and postdate emplacement of the ca. 1.42 Ga Mount Ethel pluton. Reactivation of the Homestake shear zone ca. 1452–1376 Ma produced localized...
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Journal Article
Journal: Geology
Published: 01 October 2002
Geology (2002) 30 (10): 943-946.
... dike yields a U-Pb date of 1.68 Ga, similar to 1.68 Ga metamorphic sphene dates (K.R. Chamberlain, 2002, personal commun.). Mylonite strands (S 3 ), pseudotachylyte, and cataclasite crosscut S 1 and S 2 and are inferred to be synkinematic with the adjacent ca. 1.42 Ga Mount Ethel pluton, on the basis...
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Journal Article
Journal: Lithosphere
Published: 01 December 2015
Lithosphere (2015) 7 (6): 603-610.
... alluvium, colluvium, and glacial deposits; Qa—Quaternary alluvium, colluvium, and glacial deposits; Xbp—1746 ± 6 Ma Buffalo Pass pluton ( Premo and Van Schmus, 1989 ); Xm—undifferentiated Paleoproterozoic metamorphic rocks; Yme—ca. 1.42 Ga Mount Ethel pluton ( Snyder, 1980 ). Structural symbols: S 1...
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Journal Article
Published: 01 May 2013
Scottish Journal of Geology (2013) 49 (1): 59-77.
..., North Scotia Ridge ( Fig. 1 ). It lies about 2000 km east of Cape Horn at a latitude of about 54°–55°S and a longitude of about 36°–38°W. The island has a length of about 170 km from NW to SE, with a maximum width of about 40 km. The mountainous, glacial interior rises to the 2934 m summit of Mount...
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Journal Article
Journal: Economic Geology
Published: 01 September 2010
Economic Geology (2010) 105 (6): 1113-1142.
... ). Cannivan Gulch, Thompson Creek, and White Cloud are the largest deposits within the Idaho-Montana porphyry belt. Henderson, Mount Emmons, and Climax are some of the largest porphyry Mo deposits in the world and are located within the Colorado mineral belt. Approximate deposit ages are summarized from...
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