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 7 of 7 for “"Slab window"”.
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The Provenance of Eocene Tuff Beds in the Fossil Butte Member of the Green River Formation of Wyoming: Relation to the Absaroka and Challis Volcanic Fields
… important implications for the development of a slab window in western North America during the Eocene. Compositional variation of Challis volcanic rocks through time indicates that calc-alkaline rocks with a slight A-type component erupted early in its history, and as the slab window matured the …
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Neotectonics & Cooling History of the Southern Patagonian Andes
… and widening of an extensive asthenospheric slab window since the Middle Miocene. Several of the predicted upper-plate geologic manifestations of such deep-seated geodynamic processes have been studied in this region, but many topics remain highly debated. One of the main controversial topics …
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Three-dimensional thermo-mechanical modeling of deformation at plate boundaries : case study San Andreas Fault System
… cools and captures the uprising mantle in the slab window, and then it causes the accretion of the continental crustal blocks. The alternative theory attributes the accretion to the capture of Farallon plate fragments (microplates) stalled in the ceased Farallon-North America subduction zone. …
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A model of the crust and upper mantle structure of the Hellenic and Cyprus subduction zones constrained by gravity and seismic data
… large-scale continental extension, uplift, slab rollback, slab break-off and slab-tear. Several seismic tomography studies suggest the presence of a low-velocity zone in the upper mantle beneath southwestern Anatolia. The low-velocity zone is interpreted as asthenospheric material rising up …
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New Constraints For Convergent Margin Plate Tectonic Reconstructions From Imaged And Predicted Mantle Structure
… At East Asia, a 4000 km-long, NE-SW trending ‘slab gap’ is mapped from seismic tomography that fits with the geodynamically-predicted signature of the subducted Izanagi-Pacific ridge. Our study suggests that slab gaps from ancient ridge subduction can be identified from seismic tomography …
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A Second North American Hot-spot: Pleistocene Volcanism in the Anahim Volcanic Belt, west-central British Columbia
… the AVB include regional extension, a plate edge/slab window effect along the northern edge of the subducted Juan de Fuca/Explorer plates, and a fracture propagating west to east. In this study, I first summarise existing works to provide a context for AVB volcanism. Then I report new whole-rock …
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Petrology and geochemistry of Sangeang Api and recent volcanism in the Sumbawa-Flores sector of the Sunda Arc: the response of along-arc geochemistry to subduction processes.
… suggests that they cannot have been produced by slab melts as is often suggested for adakites. Trace element characteristics and thermodynamic modelling suggest that a possible source of these magmas is through partial melting (10-13%) of basaltic underplates. Ultrapotassic magmatism in the Sunda …