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Series: Geological Society, London, Special Publications
Published: 01 January 2017
DOI: 10.1144/SP439.20
EISBN: 9781862399716
... fault growth and linkage, changes in the strike of the bounding fault or the decay of slip along growth faults through time. The interaction between a listric normal fault and its hanging-wall rollover has been demonstrated by analogue modelling (e.g. Ellis & McClay 1988 ; Vendeville & Cobbold...
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Series: Geological Society, London, Special Publications
Published: 01 January 2017
DOI: 10.1144/SP439.22
EISBN: 9781862399716
... . 2012 ; Jackson & Rotevatn 2013 ; Nicol et al . 2016 ; Tvedt et al . 2016 ). Based largely on geometric criteria, such as along-strike displacement variations and the presence of breached relays at segment boundaries, most studies interpret that segmented fault arrays grew (for ancient examples...
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Series: GSA Special Papers
Published: 01 January 2015
DOI: 10.1130/2015.2509(14)
... km in depth and are in a 1-km-thick zone striking ~036° and dipping ~50°SE, consistent with a 028°, 50°SE main-shock nodal plane having mostly reverse slip. This cluster extends ~10 km along strike. The Quail fault zone projects to the surface in gneiss of the Ordovician Chopawamsic Formation just...
Series: GSA Special Papers
Published: 01 January 2015
DOI: 10.1130/2015.2509(15)
.... The hypocenter locations define a 1–2-km-wide cloud with a strike of ~029° and dip of ~53°E, consistent with the focal mechanism of the main shock. The cloud bends ~5° along strike and has a slightly shallower dip angle below ~6 km depth, indicating a broad, complex fault zone with a slightly concave shape...
Series: GSA Field Guide
Published: 01 January 2015
DOI: 10.1130/2015.0039(01)
EISBN: 9780813756394
... Table 5. Characteristics of the Harpeth River and Stones River Fault Zones Fault zone Strike Shear sense Length (km) Max. structural relief (m) Max. dip separation on a minor fault (m) Peytonsville 358° West down 4.7 10? 1.1 Arno 350° East down 13.2 27 3.8...
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Series: GSA Memoirs
Published: 01 January 2015
DOI: 10.1130/2015.1212(04)
... The dynamics of the erosive central Andean forearc vary significantly along strike. In northern Chile at 20°S–27°S, and particularly at 22°S–25°S, the forearc in the Coastal Cordillera has been undergoing extension since at least the Pliocene, reactivating steep E-dipping faults of the Mesozoic...
Series: GSA Memoirs
Published: 01 January 2015
DOI: 10.1130/2015.1212(05)
... for the highly segmented distribution of hydrocarbon resources in the fold-and-thrust belt. We use an ~7500-km-long, orogen-parallel (“strike”) structural cross section drawn near the eastern terminus of the fold belt between the Colombia-Venezuela border and the south end of the Neuquén Basin, Argentina...
.... The mylonite is foliated with a strike of 030° and dips 30°SE; the Chatham fault strikes 030° and dips 60°SE. The structural trap for uranium mineralization is contained on the east by the Chatham fault and beneath by unmineralized Leatherwood biotite gneiss, which is underlain by the Fork Mountain schist...
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Series: GSA Special Papers
Published: 01 April 2013
DOI: 10.1130/2013.2494(14)
... on these fault measurements and paleostresses computed from them. (1) Compared to the typical northerly striking normal to normal-oblique faults in the rift basins to the north and south, normal-oblique faults are broadly distributed within two merging, NE-trending zones on the northwest and southeast sides...
Series: GSA Special Papers
Published: 01 October 2012
DOI: 10.1130/2012.2492(14)
...-resolution aerial imagery, a variety of elevation data including airborne LiDAR, and a published geologic map for the area. The comparison between vector-derived strike and dip and traditional field measured strike and dip suggests that remote mapping can successfully capture the regional aspects...
Series: GSA Special Papers
Published: 01 October 2010
DOI: 10.1130/2010.2471(18)
... ~15 cm by a NNW-SSE–striking normal fault belonging to a NNW-SSE–trending en-echelon system related to an E-W–oriented regional shear zone. Structural analysis of deformed conglomerates suggests a coseismic origin of displacement. At the Gangi Vecchio archaeological site, 3 km northeast of Mount...
Series: GSA Special Papers
Published: 01 June 2010
DOI: 10.1130/2010.2463(13)
... The hypothesized presence of a detachment underlying the Lake Mead region has created a dichotomy in the interpretations of the roles of strike-slip faults of the Lake Mead fault system in accommodating regional deformation. Our detailed field mapping reveals a previously unnamed left-lateral...
Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2422(01)
...%. By the Late Miocene, extension became focused in the westernmost part of the Sierra Madre Occidental, adjacent to the Gulf of California, where NNW-striking normal fault systems produced both ENE and WSW tilt domains separated by transverse accommodation zones. It is worth noting that most of the extension...
Published: 06 October 2006
DOI: 10.1130/2006.fld008(10)
EISBN: 9780813756080
..., and duplexes) of the belt are small enough to be seen in their entirety within individual outcrops. Also, within a relatively short distance along strike, it is possible to examine changes in fold-thrust belt structural architecture that reflect along-strike changes in the thickness and mechanical properties...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2407(05)
...–striking fault system that is related to a late Paleozoic fabric and is associated with the Huincul basement high, which truncates the basin. This fabric is interpreted as being the result of the accretion of the Patagonia terrane with Gondwana during the Early Permian. Two-dimensional (2D) and three...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2408(2.3)
... in studied locations giving a linear density of 65 fractures per hundred meters. Notable increases in fracture density up to 230 per hundred meters occur over tectonic lineaments associated with the Pajarito fault system. Fracture strikes are widely dispersed, but do show a crude bimodal distribution...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2410(07)
.... This direction is perpendicular to the regional strike of the bounding thrust faults and is consistent across 35 km of dip exposure. Post-Nevadan structures include locally developed strike-slip faults and related third- and fourth-generation folds. These features have associated quartz and calcite veins...
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Series: GSA Field Guide
Published: 01 January 2005
DOI: 10.1130/2005.fld006(06)
EISBN: 9780813756066
... Abstract Within the western Great Basin, a system of dextral strike-slip faults accommodates a significant fraction of the North American–Pacific plate motion. The northern Walker Lane in northwest Nevada and northeast California occupies the northern terminus...
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Journal Article
Journal: Economic Geology
Published: 01 September 2001
Economic Geology (2001) 96 (6): 1397-1405.
..., Canada. Results indicate that third-order shear zones define a well-organized system comprising two sets of parallel-striking, moderately to steeply south-dipping curviplanar structures intersecting at constant 15° to 25° angles. Fault-fill veins are better developed within the curved segments...
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Journal Article
Published: 01 December 2000
Bulletin of the Seismological Society of America (2000) 90 (6): 1353-1368.
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