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Sacawee Block

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Journal Article
Published: 22 December 2006
Canadian Journal of Earth Sciences (2006) 43 (10): 1445-1466.
...Rashmi L.B. Grace; Rashmi L.B. Grace; Kevin R. Chamberlain; B. Ronald Frost; Carol D. Frost Abstract The Sacawee block is a narrow belt of Paleo- to Mesoarchean crust that extends for ∼70 km across the northern Granite Mountains. It is composed of the ∼3.3 Ga Sacawee orthogneiss, additional calc...
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( a ) ε Nd  plot of samples from the <b>Sacawee</b> <b>block</b> compared with those from...
Published: 22 December 2006
Fig. 8. ( a ) ε Nd plot of samples from the Sacawee block compared with those from the Beartooth–Bighorn magmatic zone and juvenile arc terranes to the south of the Sacawee block. Data from this study are shown as symbols with evolution lines. ( b ) Histogram of crustal residence model ages
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( a ) Tectonic model 1 for the evolution of the <b>Sacawee</b> <b>block</b>. This model a...
Published: 22 December 2006
Fig. 9. ( a ) Tectonic model 1 for the evolution of the Sacawee block. This model assumes the Sacawee block was part of the Wyoming Province, but was rifted off the margin at ∼2.86 Ga ( Fruchey 2002 ). Closure of the oceanic basin between the Sacawee block and the Wyoming Province causes
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Initial ε Nd  of Wyoming batholith samples compared to Louis Lake batholith...
Published: 01 June 2016
, including depleted mantle, ~3.3–3.4 Ga crust of the Sacawee block immediately north of the Wyoming batholith in the Granite Mountains, evolved metasedimentary rocks of the Granite Mountains, and juvenile metasediments of the southern accreted terranes in the Wind River Range and Granite Mountains
Journal Article
Published: 19 December 2006
Canadian Journal of Earth Sciences (2006) 43 (10): 1399-1418.
... and southern gneisses preceded the intrusion of the Bighorn batholith, a tonalitic to granitic intrusion that occupies the northern portion of the uplift. This composite batholith was intruded over the period 2.86–2.84 Ga. Ca. 3.0–2.8 Ga crust is also present in the Beartooth Mountains, the Washakie block...
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Map of the Granite Mountains showing Archean rock units. The Oregon Trail s...
Published: 22 December 2006
in Fig.  3 . The extent of the Sacawee block is shown as the lightly shaded swath. Data are from Ludwig and Stuckless ( 1978 ), Peterman and Hildreth ( 1978 ), Fischer and Stacey ( 1986 ), Langstaff ( 1995 ), Kruckenberg et al. ( 2001 ), Fruchey ( 2002 ), and Grace ( 2004 ).
Journal Article
Journal: GSA Bulletin
Published: 01 March 2017
GSA Bulletin (2017) 129 (3-4): 259-280.
... by presenting a geologic, petrologic, geochemical, and isotopic description of Paleoarchean gneisses in the Sacawee block of central Wyoming and revealing a record of Hadean crust formation and its subsequent Archean reworking and growth. Archean rocks of the Wyoming Province are exposed in basement...
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Journal Article
Published: 30 November 2006
Canadian Journal of Earth Sciences (2006) 43 (10): 1391-1397.
... the southern extension of the Trans-Hudson orogen . Geological Society of America Bulletin , 100 : 1244 – 1259 . Grace R.L.B. Chamberlain K.R. Frost B.R. Frost C.D. 2006 . Tectonic histories of the Paleoarchean to Mesoarchean Sacawee Block and Neoarchean Oregon Trail structural belt...
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Journal Article
Published: 01 June 2008
The Canadian Mineralogist (2008) 46 (3): 583-596.
... Dakota: reworked basement from the southern extension of the Trans-Hudson orogen . Geol. Soc. Am., Bull . 100 , 1244 – 1259 . Grace , R.L.B. , Chamberlain , K.R. , Frost , B.R. & Frost , C.D. ( 2006 ): Tectonic histories of Paleo-archean to Meso-archean Sacawee Block...
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Journal Article
Published: 22 December 2006
Canadian Journal of Earth Sciences (2006) 43 (10): 1419-1444.
.... ( 1988 ), and Mogk et al. ( 1992 ). In this paper we describe the Archean rocks of the Bighorn Mountains, western Owl Creek Mountains, and Washakie block of the northeastern Wind River Range (Figs.  2–4 ). Fig. 1. Map showing the location of Precambrian-cored Laramide-age uplifts in the Wyoming...
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Journal Article
Published: 11 December 2006
Canadian Journal of Earth Sciences (2006) 43 (10): 1467-1487.
... of these dikes represents a conjugate pair, is caused by structural differences among the rocks they are intruding, results from differential tectonic rotation within the Precambrian blocks, or if it indicates two completely separate sets of dikes. More extensive petrological analysis and dating are necessary...
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Journal Article
Published: 01 November 2015
Journal of Sedimentary Research (2015) 85 (11): 1416-1430.
.... ed., Laramide Folding Associated with Basement Block Faulting in The Western United States : Geological Society of America, Memoir 151 , p. 355 – 366 . Dickinson W.R. Klute M.A...
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Journal Article
Journal: Geosphere
Published: 11 April 2018
Geosphere (2018) 14 (3): 1008-1030.
... from the eastern Beartooth Mountains, Washakie block of the Wind River Mountains, and western Owl Creek Mountains ( Frost et al., 2006a ). Amphibolites with the assemblage Hbl-Pl-Bt-Ilm-Qz ± Grt ± Ttn ± Ep ± Bt ± Cum occur throughout the Teton Range. They can be divided into two groups. One has...
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Journal Article
Published: 01 June 2016
American Mineralogist (2016) 101 (6): 1332-1347.
..., including depleted mantle, ~3.3–3.4 Ga crust of the Sacawee block immediately north of the Wyoming batholith in the Granite Mountains, evolved metasedimentary rocks of the Granite Mountains, and juvenile metasediments of the southern accreted terranes in the Wind River Range and Granite Mountains...
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Journal Article
Published: 12 January 2007
Canadian Journal of Earth Sciences (2007) 43 (10): 1533-1555.
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Journal Article
Published: 06 January 2007
Canadian Journal of Earth Sciences (2007) 43 (10): 1489-1510.
... et al. 1976 ). The Archean rocks in the western Owl Creek Mountains consist of tonalitic basement gneisses ( Kirkwood 2000 ) that are the same age and compositionally similar to the granites and gneisses in the Bighorn Mountains and the Washakie block of the Wind River Range ( Frost et al. 2006...
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