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Peak-Shirley thrust complex

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Journal Article
Journal: AAPG Bulletin
Published: 01 April 1984
AAPG Bulletin (1984) 68 (4): 504.
...-displaced Emigrant Trail-Bradley Peak-Shirley thrust complex, were crumpled into anticlinal folds such as O’Brien Springs and Horseshoe Ridge. Oil and gas ranging in age from Pennsylvanian to Upper Cretaceous have been found in these structures. Only 7 wells have been drilled in the deeper part of the Hanna...
Journal Article
Published: 01 January 2013
Rocky Mountain Geology (2013) 48 (2): 143–167.
... along the northern Hanna Basin. North-vergent, out-of-the-basin thrust faults developed in response to crowding initiated by the much larger, south-vergent, basement-involved thrust complex known as the Shirley Fault. Those out-of-the-basin thrust faults had mostly bedding-parallel planes...
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Series: GSA Field Guide
Published: 01 January 2013
DOI: 10.1130/2013.0033(03)
EISBN: 9780813756332
... shortening (LPS) and minor tangential extension ( Mitra, 1994 ; Yonkee and Weil, 2010 ), but patterns are more complex at the salient ends ( Bradley and Bruhn, 1988 ) and near oblique ramps ( Apotria, 1995 ). On this trip we focus on relations for two rock types within the Sevier fold-thrust belt, red beds...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2002
GSA Bulletin (2002) 114 (7): 804–828.
... shortening: (1) the Gibson Peak growth syncline in the footwall of the Crestone thrust fault, which formed by syndepositional rotation of the Crestone Conglomerate Member of the Sangre de Cristo Formation during thrust displacement; (2) the Sand Creek thrust fault, which cuts the lower part of the Crestone...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 2003
AAPG Bulletin (2003) 87 (10): 1599–1622.
... with thrusted anticlines appear to have experienced complex and long-lived structural deformation. Several anticlines in the basin display closely spaced extensional faults on their crests ( Figure 14A, B ). These faults, which are well imaged over the Cocuite structure, are also evident on 2-D lines over other...
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Journal Article
Published: 01 January 2004
Rocky Mountain Geology (2004) 39 (1): 7–64.
...-of-the-basin thrusts ( Fig. 10 ). This south-directed thrust system was long-lived but episodic, thus yielding complex overprinting relationships (e.g., folded folds in its hanging wall; i.e., Beer Mug anticline, see Lillegraven and Snoke, 1996 , fig. 19a, b). The main purposes of this paper...
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Journal Article
Published: 01 June 2016
Mineralogical Magazine (2016) 80 (4): 585–637.
... to the complex have been thermally metamorphosed to hypersthene hornfels over a distance of 0.5–1 km from the contact and a more distal zone of cordierite-cummingtonite hornfels 0.5–1.5 km thick. Assemblages in the iron formation are consistent with peak metamorphic temperatures around 825°C and pressures...
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Journal Article
Journal: AAPG Bulletin
Published: 01 September 1995
AAPG Bulletin (1995) 79 (9): 1377–1394.
... are oblique to the average northwesterly trend of foreland faults and folds. Tectonic models predict that these arches formed by one of the following mechanisms: north-south–directed thrust faulting; sinistral strike-slip faulting; or northeast-southwest–directed, oblique-slip thrust faulting. In the eastern...
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Journal Article
Published: 01 July 2015
Rocky Mountain Geology (2015) 50 (1): 30–118.
... are of the ‘thick-skinned,’ basement-involved variety. Among the most important of examples around margins of the eastern Hanna Basin are the: (1) Shirley Fault ( Clemens and Lillegraven, 2013 , figs. 4, 6, and 7), seen directly external to the northern basin margin; and (2) Elk Mountain thrust complex ( Figs. 7...
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Series: AAPG Memoir, AAPG Memoir
Published: 01 January 2003
DOI: 10.1306/M79877C34
EISBN: 9781629810546
... on the other— thus accounting for the complex succession of frontal accretion in the El Furrial subthrust trend and out-of-sequence reactivations in the Pirital High, which are well documented indeed by the deformation of Quaternary sequences in the vicinity of the Pirital thrust front. Another major...
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Journal Article
Journal: AAPG Bulletin
Published: 01 September 2003
AAPG Bulletin (2003) 87 (9): 1411–1435.
..., and areas with structural inversion that could enhance trapping and reservoir productivity. Early Neogene thrusting south of the basin triggered evacuation of Oligocene shale along northwest-dipping listric faults in the eastern and southeastern basin margin. These faults are associated with large-scale...
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Journal Article
Published: 01 May 2019
Rocky Mountain Geology (2019) 54 (1): 1–17.
... of the Phanerozoic strata, which strike roughly perpendicular to the shortening directions ( Redden and DeWitt, 2008 ). Additional complexities in the shortening direction are present near the intersection of the N-trending Fanny Peak Monocline and the NW-trending Black Hills Monocline near Newcastle ( Garrand, 2015...
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Journal Article
Published: 01 January 2002
Rocky Mountain Geology (2002) 37 (2): 111–134.
... Peak, north of Pikes Peak. It is probable that an uplift event in the central and southern Front Range caused the dispersal of the D2 sequence strata. The accumulation of D2 sequence arkose may be coincident with uplift in the Pikes Peak area and eastward thrusting of the Ute Pass fault. An alternative...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 09 August 2017
Lithosphere (2017) 9 (5): 828–850.
... and a gently northeast-dipping backlimb. Anticlines are linked across structural saddles (relay zones) that are locally cut by steep east-striking oblique-slip faults and thrust faults that accommodated shortening transfer. Minor wedge faults within limestone show consistent relationships with respect...
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Journal Article
Journal: Geosphere
Published: 16 October 2019
Geosphere (2019) 15 (6): 1774–1808.
... succession overlapped the southeastern succession at ca. 81 Ma. They were deformed together ca. 80 Ma by southeast-verging fold-and-thrust–style deformation interpreted to represent final accretion of the Alexander-Wrangellia-Peninsular terrane along the southern Alaska margin. We interpret the tectonic...
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Journal Article
Journal: Economic Geology
Published: 01 March 2015
Economic Geology (2015) 110 (2): 355–386.
...-verging thrusting (D 2 ). The late fluid-induced event (Tropicana event; Doyle et al., 2013 ; Blenkinsop and Doyle, 2014 ) produced a mineral assemblage indicative of greenschist-facies conditions. The paucity of water in granulite-facies gneisses under retrograde conditions suggests that fluids were...
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Journal Article
Published: 12 January 2007
Canadian Journal of Earth Sciences (2006) 43 (10): 1533–1555.
... are bounded on the southwest by the Bradley Peak thrust, a Laramide-aged thrust fault that places Archean rocks on a footwall of Phanerozoic sedimentary rocks. The Seminoe Mountains are bounded by the Kortes reverse fault on the north. This fault is interpreted as a Precambrian shear zone that was reactivated...
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Journal Article
Journal: Economic Geology
Published: 01 November 2015
Economic Geology (2015) 110 (7): 1669–1695.
... of the Mount Keith Ultramafic Complex between 6985250 m N and 6986150 m N and at about 0 m RL ( Figs. 8A , 9 ). The fault dips at about 25° toward 260° and has a top block up and to the east sense of displacement in sectional view. The maximum apparent thrust displacement (as measured on the base of Zone 104...
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Journal Article
Published: 01 June 2016
American Mineralogist (2016) 101 (6): 1332–1347.
... represents an analog for the plutonic complex underlying these ignimbrite systems, and provides an opportunity to examine the shallow magma chamber directly. Our work establishes that, aside from more leucocratic margins, the sill-like magma chamber is petrologically and chemically homogeneous, consistent...
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Series: Special Publications of the Society of Economic Geologists, Special Publications of the Society of Economic Geologists
Published: 01 January 2010
DOI: 10.5382/SP.15.2.14
EISBN: 9781629490403
... and metamorphic rocks of the Granite Mountains of central Wyoming. This is supported by the observation that the major uranium deposits within Cenozoic sedimentary rocks are generally in clusters that surround the Precambrian core complexes of central Wyoming. Crustal deformation during the Laramide orogeny...
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