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Showing 1 to 20 of 28 for “"transpression"”.
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Laramide transpression and oblique thrusting in the northeastern Front Range, Colorado: 3D kinematics of the Livermore Embayment
… axis rotation within E-, and NE-trending transpressional structures. Relative-timing relationships of faults to joints and a 058° trend of master joints suggest a late-Laramide timing of extensional fracturing. An average trend of 149° for cross joints are consistent with a mid- to …
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Tectonics of the lower Susquehhanna River region, southeastern Pennsylvania and northern Maryland: late proterozoic rifting to late paleozoic dextral transpression
… deposits are also related to Iapetan rifting. Transpressional structural models have been applied to oblique convergence tectonics, with the coeval development of contractional and transcurrent structures. Late Paleozoic post-Taconian deformation in the north-central Appalachian Piedmont of …
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Tectonics of the Wolf Creek Fault Zone, southern Illinois: A consequence of Late Paleozoic transpression and transtension at the southeastern end of the Ste. Genevieve Fault System
… the stress state changed over time. First, transpression associated with left-lateral strike-slip on the SGFS produced shortening structures. Later, transtension associated with right-lateral strike-slip produced an extensional pull-apart zone. Similar episodes of deformation have been found …
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Origin of Periclines in the Ozark Plateau, Missouri: A field and numerical modeling
… implies a localized stress enhancement in the transpression zone and the basin and dome periclines is formed by applying unidirectional shortening. We propose that these folds are periclines formed in a transpression zone as a result of reactivation of basement faults with left-lateral slip …
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Geometry, kinematics and age of the northern half of the White Mountain shear zone, eastern California and Nevada
… separate coeval kinematic framework and hence a transpressional history. The WMSZ appears to be tectonically related to both the Sierra Crest shear system to the west and the Santa Rita shear system to the south. Correlation between the WMSZ and the Santa Rita shear system indicates that Late …
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The growth of fractures in the Earth
… to the one obtained in the laboratory. Under transpression, fracture also grows by a kink and along a smooth trajectory which is of the opposite convexity than in the previous case, when compression is large. Right-stepping fractures under a left-lateral shearing run away from each other when …
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A STRUCTURAL HISTORY OF THE GARNET STOCK AND ITS RELATIONSHIP TO DEFORMATION ALONG THE LEWIS AND CLARK LINE, WESTERN MONTANA
… Sapphire and Lombard thrust slabs to the SW. The transpression extruded SE trending, en echelon flower structures along a 40 km-wide shear zone. Late Cretaceous satellite stocks of the Boulder batholith intruded the shear zone and interfered with folding and faulting. One of these, the 83-Ma …
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A STRUCTURAL HISTORY OF THE GARNET STOCK AND ITS RELATIONSHIP TO DEFORMATION ALONG THE LEWIS AND CLARK LINE, WESTERN MONTANA
… Sapphire and Lombard thrust slabs to the SW. The transpression extruded SE trending, en echelon flower structures along a 40 km-wide shear zone. Late Cretaceous satellite stocks of the Boulder batholith intruded the shear zone and interfered with folding and faulting. One of these, the 83-Ma …
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The structural and engineering geology of the Country Rock at Finsch Mine
… of the tectonic stress vectors with resultant transpression. During transpression the fault-parallel jointing/cleavage is fanned by fault-parallel folds and a conjugate set of joints form as a result of WSW directed crustal shortening. Extensive line sampling of the rock discontinuities …
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Stream profiles as a proxy for uplift in the San Bernardino Mountains
… uplifted since the late Miocene due to transpression-related thrust faulting. Although regional uplift patterns are not as clear from this data as those of a stream profile analysis in the San Gabriel Mountains, the results observed indicate that this technique can extract useful …
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Analysis of the Cabin Canyon shear zone in the Virgin Mountains : implications for an early accretionary province boundary and later transpressional zone.
… grain size reduction (mylonitization). This transpressional deformation created sub-horizontal lineations and shear sense indicators such as delta and sigma porphyroclasts, shear bands, C-S fabrics, and bookshelf sliding. Pegmatites were intruded at various stages during mylonitization as …
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The role of the Picuris orogeny in the tectonic evolution of Proterozoic North America
… continental arcs, backarcs, and zones of transpression; it may have had an orogenic plateau, and convergence may have been accommodated by collision in addition to subduction.</p>
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The Box Ankle and Ocmulgee shear zones of central Georgia: a study of geochemical response to Southern Appalachian deformation events
… from ages obtained in this study Include transpression and doming of the basement and Piedmont cover as seen In the Box Ankle fault trace. Dextral strike-slip with right stepover displacement between the Ocmulgee-Goat Rock fault system and the Towaliga system provide a transpressional …
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Long-term exhumation of landscapes along the Pacific-North American plate boundary as inferred from apatite (U-Th)/He and ArcGIS analyses
… American plate boundary is typified by transpression and convergence, yet the relationship between interplate deformation and long-term crustal shortening is not fully understood. The continuous belt of rugged topography that extends along the entire plate boundary is generally …
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Tectonic significance of the Atnarko complex, Coast Mountains, British Columbia
… between ca. 70-60 Ma indicate that dextral transpression occurred between the Kula and North American plates. Strain during this transpressive deformation was partitioned into compressive and translational regions. The Atnarko complex area is situated at the transition between translation …
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Mineralogical, chemical and isotopic diversity in plutonic rock suites from the Coastal Maine Magmatic Province:the role of source region heterogeneity, tectonic setting and magmatic processes
… of Devonian granites, reflects a period of transpression during which upwelling mantle melts were confined to the base of the crust. The diversity of granitic plutons reflects changes in the mineral assemblages present during partial melting, and in some instances, modification as a result …
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Paleozoic and Grenvillian structures in the southern Appalachians: extended interpretation from seismic reflection data
… strike and is associated with Alleghanian transpression. Alternatively, the reflectors may actually represent the subsurface location of the Hayesville fault, in which case convergent reflector geometry of the Hayesville fault and the Blue Ridge thrust suggest that the Blue Ridge thrust …
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A PALAEOMAGNETIC STUDY OF CRUSTAL ROTATIONS AND THEIR RELATIONSHIP TO THE TECTONICS OF THE ATACAMA AND DOMEYKO FAULT SYSTEMS, NORTHERN CHILE
… The rotation is the result of sinistral transpression during the middle Cretaceous as a result of the Peruvian Orogeny leading to abandonment of the Jurassic-Early Cretaceous magmatic arc in the Coastal Cordillera and its subsequent eastward migration. The Domeyko Fault System (DFS) …
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Multidisciplinary investigations of the Chaman strike-slip fault along the western Indo-Asian collision boundary, Pakistan
… respectively. Geomorphic history of an active transpression was reconstructed using digital elevation model data integrated with Advance Spaceborne Thermal Emission and Reflection Radiometer and images from GeoEye-1 to understand the interaction of a strand of the Chaman fault and the …
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Fault interaction at different time- and length scales : the North Tehran thrust and Mosha-Fasham fault (Alborz mountains, Iran)
… of the NTT and MFF during an earlier dextral transpressional stage, when the shortening direction was oriented northwest. This regime was superseded by Pliocene to Recent NE-oriented shortening, which caused thrusting and sinistral strike-slip faulting. In the course of this kinematic …
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