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Items (1-15) out of 15 results

A Seismological Perspective on the Lithosphere-Asthenosphere Boundary

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Description:: The lithosphere-asthenosphere boundary is the world’s most ubiquitous plate boundary system, separating the high viscosity lithosphere from the underlying convecting mantle asthenosphere. Thoroughly characterizing the …
Year:: 2013
Contributor:: Ford, Heather Anne (creator); Fischer, Karen (Director); Forsyth, Donald (Reader); Hirth, Greg (Reader); Saal, Alberto (Reader); Abers, Geoff (Reader); Brown University. Geological Sciences (sponsor)
Genre:: theses
Subject:: receiver functions; asthenosphere; San Andreas Fault system; Seismology; Lithosphere; Cratons; Australia; North America
Language:: English
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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BUILDING THE CONTINENTAL LITHOSPHERE: THE HISTORY OF THE CONTIGUOUS U.S. AS PRESERVED IN CRUST AND LITHOSPHERIC MANTLE STRUCTURES

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Description:: The lithosphere, the plate in ‘plate tectonics’, preserves a record of past and present tectonic processes in its internal structures and its boundary with the …
Year:: 2016
Contributor:: Hopper, Emily (creator); Fischer, Karen (Director); Forsyth, Donald (Reader); Hirth, Greg (Reader); Parman, Stephen (Reader); Wagner, Lara (Reader); Brown University. Geological Sciences (sponsor)
Genre:: theses
Subject:: Receiver functions; Wavefield migration; Asthenosphere; Seismology; Lithosphere; North America
Language:: English
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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Closure Temperature and Closure Pressure in Bi-Mineralic Systems with Applications to REE-in-Two-Mineral Thermobarometers

Description:: Thermal evolution of the planet interior is a fundamental problem in Earth and planetary sciences. Geothermobarometers and geospeedometers are powerful tools in studying the thermal …
Year:: 2015
Contributor:: Yao, Lijing (creator); Liang, Yan (Director); Hirth, Greg (Reader); Parman, Stephen (Reader); Parmentier, Marc (Reader); Saal, Alberto (Reader); Brown University. Geological Sciences (sponsor)
Genre:: theses
Subject:: closure temperature; closure pressure; bi-mineralic systems; REE-in-two-pyroxene thermometer; REE-in-garnet-clinopyroxene thermobarometer
Language:: English
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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Controls on the Freezing, Fracture, and Evolution of Icy Ocean Worlds

Description:: Icy worlds are amongst the highest priority destinations for the search for signs of extant or extinct life beyond Earth, as well as a diverse …
Year:: 2023
Contributor:: Nathan, Erica (creator); Huber, Christian (Advisor); Head, James (Advisor); Fischer, Karen (Reader); Hirth, Greg (Reader); Birch, Sam (Reader); Howell, Samuel (Reader); Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:: theses
Subject:: Geophysics; Planetary science; icy moons; Uranus (Planet)--Titania (Satellite)
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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Early Mars Environments Revealed Through Near-Infrared Spectroscopy of Alteration Minerals

Description:: While unstable on present-day Mars, liquid water was an important geologic agent in Mars' past. This work investigates the nature and timing of aqueous processes …
Year:: 2010
Contributor:: Ehlmann, Bethany (creator); Mustard, John (Director); Head, James (Reader); Hirth, Greg (Reader); Soderblom, Laurence (Reader); Wyatt, Michael (Reader); Brown University. Geological Sciences (sponsor)
Genre:: theses
Subject:: Mars; hydrothermal; Infrared spectroscopy; Weathering; Phyllosilicates; Carbonates; Mars (Planet)
Language:: English
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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Epic Failure: A Study of Subsurface Damage Following Oblique Hypervelocity Impacts

Description:: Impact cratering is a ubiquitous process affecting planetary surfaces in the solar system. The most probable impact angle is 45°, and ¼ of all impacts …
Year:: 2012
Contributor:: Stickle, Angela M (creator); Schultz, Peter (Director); Barr, Amy (Reader); Fischer, Karen (Reader); Hirth, Greg (Reader); Spray, John (Reader); Brown University. Geological Sciences (sponsor)
Genre:: theses
Subject:: Impact Cratering; Damage; Ames Vertical Gun Range; CTH; Planetary science; Chalmers tekniska högskola
Language:: English
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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From Emplacement to the Surface - Constraining the Exhumation History of Aleutian Arc Intrusives

Description:: The Aleutian Islands, an island arc spanning over 3,000 km from the Kamchatka Peninsula to the Gulf of Alaska, formed through Pacific-North American plate subduction …
Year:: 2025
Contributor:: Carrera, Anahi (creator); Cooperdock, Emily (Advisor); Hirth, Greg (Reader); Fischer, Karen (Reader); Dalton, Colleen (Reader); Ault, Alexis (Reader); Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:: theses
Subject:: Geology; Subduction zones; Earth sciences; Alaska--Aleutian Islands; Thermochronology; Tectonics; Exhumation
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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Geochemical, Paleoclimate, and Thermodynamic Insights into Lithium Enrichment and Extraction in Western U.S. Volcano-Sedimentary Deposits

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Description:: Lithium-bearing clay deposits represent a large yet poorly constrained resource for meeting growing global demand for lithium used in energy storage technologies. In contrast to …
Year:: 2026
Contributor:: Gagnon, Catherine Anne (creator); Ibarra, Daniel (Advisor); Russell, James (Reader); Hirth, Greg (Reader); Dalton, Colleen (Reader); Whittaker, Michael (Reader); Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:: theses
Subject:: Clay minerals; Lithium silicates; isotope geochemistry; paleoclimate
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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Grain Boundaries, Deformation and Energy Dissipation in Water Ice

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Description:: Stress-reduction, creep, grain-growth, and attenuation experiments were conducted on polycrystalline water ice to examine the links amongst microstructural steady-state, the mechanical response to transient loading, …
Year:: 2017
Contributor:: Caswell, Tess Elaina (creator); Cooper, Reid (Advisor); Hirth, Greg (Reader); Dalton, Colleen (Reader); Milliken, Ralph (Reader); Kohlstedt, David (Reader); Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:: theses
Subject:: Geology; Ice; Rheology; Geophysics; attenuation
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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Joint Seismic Constraints on the Structure and Evolution of the Continental Lithosphere

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Description:: The lithosphere preserves a record of tectonic evolution in its seismic velocity structure, reflecting variations in temperature, composition, and physical state. However, individual seismic observations …
Year:: 2026
Contributor:: Huang, Yiran (creator); Dalton, Colleen (Advisor); Fischer, Karen (Reader); Saal, Alberto (Reader); Hirth, Greg (Reader); Shen, Weisen (Reader); Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:: theses
Subject:: Geology; Geophysics; Seismology; Bayesian Inversion; Lithosphere
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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MELT MIGRATION DYNAMICS AND TRACE ELEMENT FRACTIONATION BENEATH MID-OCEAN RIDGES

Description:: The objective of this thesis is to use first order geochemical and geophysical observations to understand melt generation and migration processes beneath mid-ocean ridge spreading …
Year:: 2018
Contributor:: Liu, Boda (creator); Liang, Yan (Advisor); Parmentier, Edgar Marc (Reader); Forsyth, Donald (Reader); Saal, Alberto (Reader); Hirth, Greg (Reader); Behn, Mark (Reader); Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:: theses
Subject:: Geology; Geochemistry; Two-phase flow; Geodynamics; Magmatism
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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Subduction and rift processes: Their effects on mantle heterogeneities and magmatism at the Antarctic Peninsula and surrounding mid-ocean ridges

Description:: Magmatism at the northern Antarctic Peninsula offers an exceptional opportunity to study the evolution of the Earth’s upper mantle in a region with an extensive …
Year:: 2024
Contributor:: Anderson, Danny W. (creator); Saal, Alberto (Advisor); Cooper, Reid (Reader); Hirth, Greg (Reader); Huber, Christian (Reader); Parman, Stephen (Reader); Panter, Kurt (Reader); Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:: theses
Subject:: Geochemistry; Isotope geology; mantle metasomatism; Subduction zones; Basalt; Rifts (Geology); Alkalic igneous rocks; Antarctica--Antarctic Peninsula; Mid-ocean ridges; Back-arc basins
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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The Geochemistry of Cenozoic Volcanism in the Andean Southern Volcanic Zone, 34ºS-38ºS: Evaluating the Role of Subcontinental Lithospheric Mantle in Alkali Magma Petrogenesis

Description:: The Andean Transitional Southern Volcanic Zone (34º-38ºS) represents an area of some of the most productive mafic volcanism in South America during the Cenozoic, making …
Year:: 2019
Contributor:: Chilson-Parks, Benjamin H (creator); Saal, Alberto (Advisor); Parman, Stephen (Reader); Hirth, Greg (Reader); Cooper, Reid (Reader); Kelley, Katherine (Reader); Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:: theses
Subject:: Geochemistry; Isotope geology; mantle metasomatism; Andes Region; Subduction zones; Basalt; melt inclusion; subcontinental lithospheric mantle
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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The Physics of Multiphase Magmatic Systems: Compaction-Driven Phase Separation and Eruption Dynamics

Description:: The interaction between crystals, magma, and exsolved volatiles in shallow magmatic conduits exerts first order controls on the eruptive style and intensity of terrestrial volcanic …
Year:: 2024
Contributor:: Florez, Darien (creator); Hirth, Greg (Reader); Saal, Alberto (Reader); Huber, Christian (Advisor); Parmentier, Edgar Marc (Reader); Pec, Matej (Reader); Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:: theses
Subject:: Geology; Geochemistry; Petrology; Volcanology
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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Transitions in Earth’s Convective Regimes: Causes, Styles, and Consequences

Description:: Earth's mantle governs the transfer of heat, the generation of the magnetic field, the cycling of key elements, and the style of tectonic deformation at …
Year:: 2025
Contributor:: Al Asad, Manar (creator); Lau, Harriet (Advisor); Huber, Christian (Reader); Fischer, Karen (Reader); Evans, Alex (Reader); Buffett, Bruce (Reader); Hirth, Greg (Reader); Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:: theses
Subject:: Geodynamics; Evolution; Earth (Planet); Earth; Lithosphere; Asthenosphere; planetary interiors; Earth sciences; geodynamo; Heat--Convection, Natural; Core-mantle boundary; Water cycles
Collection:: Earth, Environmental and Planetary Sciences; Theses and Dissertations

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