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Now showing items 11-20 of 34
Constraining Lithospheric Structure across the Continental Borderland using Receiver Functions
(2014)
Due to its complex history of deformation, which includes subduction, rifting, and transtensional motions, the California Continental Borderland provides an interesting geological setting for studying how the structure ...
Melt extraction and crustal thickness variations at segmented mid-ocean ridges
(2017)
Mid-ocean ridges are underwater volcanic mountains extending more than 55,000 km in ocean basins worldwide, accounting for nearly 80% of the Earth’s volcanism. They are the birthplace of new seafloor, resurfacing two thirds ...
Lithospheric Extension on Venus: how to form narrow rifts
(2017)
The Venusian rifts of Devana and Ganis Chasmata have been noted for their
similar morphology to some rifts on Earth (i.e., the East African rift system). These
are narrow rifts that are associated with localized deformation. ...
Patterns and Mechanisms of Melt Distribution in Partially Molten Harzburgite under Hydrostatic Pressure
(2017)
Geophysical and geochemical properties of partially molten regions of the Earth’s upper mantle are strongly affected by the distribution of melt. I investigated the mechanisms affecting the 3-dimensional (3D) melt distribution ...
Inverse Spectral Methods in Acoustic Normal Mode Velocimetry of High Reynolds Number Spherical Couette Flows
(2016)
Experimental geophysical fluid dynamics often examines regimes of fluid flow infeasible for computer simulations. Velocimetry of zonal flows present in these regimes brings many challenges when the fluid is opaque and ...
CONSTRAINTS ON THE LITHOSPHERIC STRUCTURE OF MID OCEAN RIDGES FROM OCEANIC CORE COMPLEX MORPHOLOGY
(2016)
The Mid-oceanic ridge system is a feature unique to Earth. It is one of the fundamental components of plate tectonics and reflects interior processes of mantle convection within the Earth. The thermal structure beneath the ...
Evolution of strength and physical properties of ultramafic and carbonate rocks under hydrothermal conditions
(2016)
Interaction of rocks with fluids can significantly change mineral assemblage and structure. This so-called hydrothermal alteration is ubiquitous in the Earth’s crust. Though the behavior of hydrothermally altered rocks can ...
The Role of Water and Strain Rate in the Deformation of Limestone
(2017)
Fluids are pervasive throughout the Earth’s crust. Fluid-rock interaction can significantly alter the mechanical and petrophysical properties of host rocks. This study focuses on the role of fluids in weakening porous ...
Characterization of the regional, crustal, and global distribution and abundance of the heat producing elements and their geoneutrino flux
(2019)
The amount and distribution of radiogenic power generation from the heat producing elements (HPE) U, Th, and K in the Earth is not well constrained. Compositional estimates of these elements vary by a factor of three in ...
Seismic Observations of Fluvial Energy Dissipation
(2018)
Observing microseismic waves excited by turbulent flow is an emerging way to document river dynamics during extreme flood events. This thesis records fluvial-seismic observations in two contrasting systems at different ...