Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 31 for “"Fold-thrust"”.
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The kanarra fold-thrust system -- The leading edge of the sevier fold-thrust belt, southwest Utah
“The Jurassic to Eocene Sevier fold-thrust belt is the subject of continued scientific curiosity in tectonics, stratigraphy, and industry. Understanding its development in southwest Utah is hindered in part due to the multiple origins proposed for the Kanarra anticline, a major leading edge …
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Models of Continental Fold-Thrust Belt Salients
… (3) margin-controlled salients, which form where fold-thrust belts mold to the preexisting irregular shape of the margin; and (4) detachment-controlled salients, which form due to variations in the lateral continuity of weak glide horizons. From this work, it is clear that structural trendline …
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Contractional tectonics : the Himalayan orogen and Perdido fold-thrust belt
… of passive margins, which are characterized by fold-thrust belts that are hundreds of kilometer-scale and tens of kilometer-scale, respectively. The Himalayan orogen is an excellent example of collisional orogenic belts along convergent plate boundaries. It is commonly structurally defined as …
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Structural style of the San Francisco Mountains, Sevier fold-thrust belt, Utah
The Sevier fold-thrust belt contains thrust sheets that are overprinted by extensional faults, distorting correlations of geologic structures in the region. The Frisco thrust is exposed within the San Francisco Mountains in west-central Utah. Correlations with the better studied Canyon …
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Aspects of deformation in a fold-thrust belt: veins and backstop evolution
Fold-thrust belts are common manifestations of crustal shortening at convergent and collisional plate boundaries. They contain a variety of geologic structures that develop over a wide range of length scales. This dissertation focuses on two specific aspects of fold-thrust belts: the veins that …
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Tectonics of the Uinta Recess in the Sevier Fold-Thrust Belt, Utah
… synthesis of stratigraphic data and study of thrust-belt analog models suggests that the map-view geometry of the Sevier fold-thrust belt was influenced during formation, at the site of the future U/C arch because the site marked an abrupt change in the thickness of the sedimentary basin in …
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Modelling Viscous Flow and Elastic Deformation in Fold-Thrust Belts and Magmatic Intrusions
… two geophysical processes: the formation of fold-thrust belts and the dynamics of shallow magmatic intrusions. Although geophysically distinct, these two problems both involve the interplay between viscous flow and elastic deformation and so inform the modelling of one another. Fold-thrust …
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Seismic interpretation and structural analysis of the Alleghanian fold-thrust belt in Central Alabama
In the central part of the Alleghanian fold-thrust belt of Alabama, multi-channel seismic and well log data are used to analyze structural elements of the thrust belt. Six horizons were interpreted on the seismic data in two-way travel time and were depth-converted using interval velocities derived …
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Progressive deformation, fluid flow and water-rock interaction in the Mexican Fold-Thrust Belt, Central Mexico
An integrated study of the Mexican Fold-Thrust Belt (MFTB) in central Mexico provides information on the evolution of the belt and the processes operating to produce structures and fabrics. Key questions addressed concern to the role of lithology in controlling the style of deformation, the role of …
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Neotectonics Study Along The Frontal Thrust System Of The Fold-Thrust Belt Of Northwest Himalayas, Pakistan
… tectonic deformation of the Himalayan Frontal Thrust System. The first study focuses on the westernmost segment of the Himalayan frontal thrust in the Manzai Ranges. The geologic landscape shows active tectonic features, i.e., stream deflection, wind, and water gaps associated with geologic …
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Structure of the Patagonian fold-thrust belt in the Magallanes region of Chile, 53° - 55° S Lat.
… development of the Patagonian retroarc fold-thrust belt and the Neogene to present tectonic superposition of a left-lateral strike-slip plate margin defined by the Magallanes- Fagnano fault zone. In this dissertation, I present new geologic maps, cross sections and detailed macro- and …
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Geology of the Roberts Hill area in the Hudson Valley fold-thrust belt, Greene County, eastern New York
The Hudson Valley fold-thrust belt (HVB) is a narrow band of deformed Silurian and Devonian strata, west of the Hudson River, in the region between Kingston and Albany, New York. Previous studies of the HVB at the latitude of Catskill, New York suggest that shortening is accommodated above two …
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Aspects of Deformation and Strain in the Appalachian Fold -Thrust Belt (New York) and the Shear Zones of the Sveconorwegian Orogen (Norway)
… (Late Paleozoic) northern Appalachian foreland fold-thrust belt, near the town of Rosendale in southeastern New York State. Results suggest that along-strike thinning (from south to north) of rigid units within the Silurian-Devonian stratigraphic sequence caused a decrease in the amplitude of …
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Structural Characteristics and Tectonic Evolution of the Pirineus Syntaxis, Central Brazil
… the curve represents the overlap of two distinct fold-thrust belts. The southern limb of syntaxis consists of an east-verging fold-thrust belt in which spoon-shaped thrust sheets, bordered by lateral ramps, are arrayed in an imbricate fan. These thrust sheets consist of continental-margin strata …
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Structural geometry of the frontal Ouachitas-Arkoma basin transition zone in Western Arkansas
… Fault and Ross Creek Fault are the leading-edge thrusts of the Ouachita fold-thrust belt and form the southern boundary of the Arkoma foreland basin in Oklahoma and Arkansas, respectively. Strain partitioning between the fold-thrust belt and the foreland basin is accommodated by the Wilburton …
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Three-dimensional kinematics and geometries of thrust-related folds
… geometries associated with the development of thrust-related folds. First, the complex relationship between fold geometry and along-strike changes in fault displacement and fault shape was considered by extending equations describing conventional two-dimensional folding models into the third …
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Structural geology and geochemistry of sedimentary rock-hosted gold in the eastern Nadaleen Trend, Yukon Territory, Canada
… from mid-Cretaceous NNE-vergent, thin-skinned fold-thrust deformation. Structures within a 6 km2 area at the eastern Nadaleen Trend are complex and are not recognized elsewhere in northeastern Yukon Territory. Field observations suggest these rocks are the product of NNE-SSW-directed shortening …
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Investigation of a triangle zone structure between Augusta and Bowman’s Corners, Lewis and Clark County, Montana
… reservoirs along Canada’s Rocky Mountain thrust belt are contained by a triangle zone, which is comprised of complex antiformal wedge structures that commonly form along the leading edges of foreland fold-thrust systems world-wide. Duplex imbrication within triangle zones create stacked …
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Investigation of a triangle zone structure between Augusta and Bowman’s Corners, Lewis and Clark County, Montana
… reservoirs along Canada’s Rocky Mountain thrust belt are contained by a triangle zone, which is comprised of complex antiformal wedge structures that commonly form along the leading edges of foreland fold-thrust systems world-wide. Duplex imbrication within triangle zones create stacked …
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