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Full-Text Articles in Physical Sciences and Mathematics
Analyzing Slab Holes In Subduction Zones And Their Impacts Through Numerical Simulations, Taylor M. Arrowood
Analyzing Slab Holes In Subduction Zones And Their Impacts Through Numerical Simulations, Taylor M. Arrowood
Theses and Dissertations--Earth and Environmental Sciences
Subduction zones form as higher density oceanic lithosphere is forced beneath an over-riding, lower density, continental or oceanic plate; a process driven by contrasts in buoyancy throughout this system. We seek to explore subduction zones in which the subducting lithosphere is discontinuous after passing through the trench, forming a slab gap. The main research objective is to determine the effect of slab gaps on surface topography in a subduction-related orogen and asthenospheric flow into the mantle wedge using two and three-dimensional numerical mechanical models. We obtain results from 24+ models that suggest a connection between slab gaps/holes and the magnitude …
Timing Of Regional Metamorphism In The Inner Piedmont And Blue Ridge Of North Carolina: Evidence From Monazite U-Pb Geochronology, Nicholas Edwin Powell
Timing Of Regional Metamorphism In The Inner Piedmont And Blue Ridge Of North Carolina: Evidence From Monazite U-Pb Geochronology, Nicholas Edwin Powell
Theses and Dissertations--Earth and Environmental Sciences
Channel and escape flow, or lower crustal ductile flow and redirection from orogen-normal to orogen-parallel flow, are among the most impactful concepts introduced to explain shortening accommodation in large, hot orogens. In the Inner Piedmont (IP), southern Appalachians, channel and escape flow were proposed to have occurred during the Neo-Acadian (376–340 Ma) orogeny. However, the polymetamorphic history of the southern Appalachians makes it difficult to isolate thermal and deformational events for process-focused studies necessary to test these ideas in the IP. To address this, we used in situ laser ablation split stream (LASS) monazite U-Pb geochronology alongside new garnet chemical …