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 85 for “"thrust belt"”.
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Models of Continental Fold-Thrust Belt Salients
… 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 patterns …
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Structural Evolution of the Himalayan Thrust Belt, West Nepal
… window in the central portion of the Himalayan thrust belt. Presently, structural interpretations of the thrust belt do not explain in detail how these strata were incorporated into the thrust belt and why they are not widely exposed throughout the Himalaya. My research provides answers to these …
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Cenozoic extension superimposed on a Mesozoic thrust belt, central Nevada
The central Nevada thrust belt (CNTB) is a north-south trending belt of contractile structures in the hinterland of the Sevier orogenic belt. This study tests the hypothesis that analysis and regional correlation of CNTB structures is possible after retrodeformation of younger extensional faults; …
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Contractional tectonics : the Himalayan orogen and Perdido fold-thrust belt
… of contractional tectonics: collisional orogenic belts and toe structures 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 …
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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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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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History and timing of polyphase Proterozoic deformation in the Manzano thrust belt, central New Mexico
… spectacular exposures of the Proterozoic Manzano thrust belt. This region is an important place to better characterize polyphase deformation and magmatism related to the assembly of Laurentia, particular the 1.65-1.60 Ga Mazatzal orogeny and the later 1.4 Ga thermo-tectonic event. This study …
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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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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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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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The Saltville thrust: investigation of a regional thrust fault in a foreland fold and thrust belt
… are not well understood. The Saltville thrust, a major overthrust in the southern Appalachians, was investigated with respect to deformation mechanics. Thrust termination occurs in the overturned, northwest facing Sinking Creek anticline, at the juncture between the southern and central …
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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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Identifying Key Factors Affecting Translational Landslides in Part of the Yakima Fold and Thrust Belt, Washington State
Washington has one of the fastest growth rates in the nation, and unfortunately also is among the most landslide-prone states. With increased population density and urban sprawl, the need for landslide hazard assessment grows. On the Columbia Plateau in central Washington, the smooth rigid, …
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Reservoir Characterization and Outcrop Analogs to the Navajo Sandstone in the Central Utah Thrust Belt Exploration Play
… oil field which is located in the central Utah thrust belt exploration play. The reservoir for the Covenant field is the Navajo Sandstone. This study can serve as an outcrop analogue for this developing play and other eolian reservoirs worldwide. There are eight facies within the Navajo …
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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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Mesozoic tectonics of the Maria fold and thrust belt and McCoy basin : an examination of polyphase deformation and synorogenic response
… all current knowledge about the Maria Fold and Thrust Belt and McCoy Basin tectonic provinces of southeastern California. We also present new geologic mapping, structural analysis from macroscopic to microscopic scale, U-Pb zircon ages and Ar-Ar hornblende and biotite ages from key areas in the …
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Structural development, thermal evolution, and tectonic significance of a Cordilleran basement thrust terrane, Maria fold and thrust belt, west-central Arizona
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1989.
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New stratigraphy, polyphase deformational history and basement-involved thrust belt model for the Proterozoic Uncompahgre Group and Vallecito Conglomerate, Needle Mountains, Colorado
… deformation sequence involving D1 north-directed thrusting, D2 macroscopic folding and south-directed thrusting and D3 macroscopic folding-associated high-temperature low-pressure metamorphism of ~ 500°C and 2-3 kbars. D1 thrusting is interpreted to be related to the Mazatzal orogeny and resulted …
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