Geochemistry

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2026

• Bednarick, Amanda Lee — Ocean-Mantle Interactions Through Earth History (Dissertation (Ph.D.))
• Bhattacharjee, Surjyendu — Aqueous Processes Across the Solar System: Isotopic Insights from Chondrites and Mars (Dissertation (Ph.D.))
• Thalhammer, Korbinian O. — A Physicochemical Approach to Determining the Functions of Microbial Phenazine Metabolites (Dissertation (Ph.D.))

2025

• Liu, Weiyi — Insights Into the Core’s Structure, Formation and Evolution from First-Principles Calculations (Dissertation (Ph.D.))
• Miaou, Emily Yishiuan — From Melting Dynamics to Medical Diagnostics: Studies in Geochemical Kinetics (Dissertation (Ph.D.))

2024

• Dong, Guannan — Taking the Pulse of Life: Intramolecular and Clumped Isotopic Perspectives on the Origins and Evolution of Hydrocarbons in Geological and Prebiotic Systems (Dissertation (Ph.D.))
• Li, Haoyu — Revisiting U-Pb and ²⁶Al-²⁶Mg Systematics of Calcium Aluminum-Rich Inclusions: Applications on Early Solar System Chronology and Evolution History (Dissertation (Ph.D.))
• Marquez, Ren Thomas Caburnay — Primitive Stellar Remnants and their Signatures as Probes to the Nascent Solar System (Dissertation (Ph.D.))
• Palfey, William Richard — Hydrogen Incorporation in Rutile- and Perovskite-Structured Minerals and Their Analogues (Dissertation (Ph.D.))
• Wang, Renée Zurui — From Photosynthesis to Detoxification: Microbial Metabolisms Shape Earth’s Surface Chemistry (Dissertation (Ph.D.))
• Zeichner, Sarah Soojin — Fates of Carbon (Dissertation (Ph.D.))

2022

• Kemeny, Preston Cosslett — A Fluvial Perspective on the Role of Sulfide Oxidation in the Global Carbon Cycle (Dissertation (Ph.D.))

2021

• Biasi, Joseph Anthony — Paleomagnetism and Geochemistry of Basalts in the North American Cordillera, Davis Strait, and Antarctica (Dissertation (Ph.D.))
• Chimiak, Laura Marie — Prebiotic Fingerprints (Dissertation (Ph.D.))
• Johnson, Daniel Lee — Sulfur Isotopic Insights into the Modern and Ancient Marine Sulfur Cycles (Dissertation (Ph.D.))
• Lewis, Madeline Janine — Magmatic Differentiation in Arc and Mid Ocean Ridge Settings (Dissertation (Ph.D.))
• Phillips, Alexandra Atlee — Sulfur Cycling in the Water Columns of Lakes and Oceans (Dissertation (Ph.D.))
• Xie, Hao — Road to Equilibrium: Stable Isotope Distribution in Gaseous Alkanes and Thermal History of Geological Hydrocarbons (Dissertation (Ph.D.))

2020

• Martin, Peter Eckels — Detection and Analysis of Martian Low-Temperature Geochemistry (Dissertation (Ph.D.))

2019

• Chen, Sang — Understanding Geochemical Tracers in Deep-Sea Corals from a Biomineralization Perspective (Dissertation (Ph.D.))
• Miller, Hayden Bryce Dutcher — Stable and Radiogenic Isotope Studies of Iron-oxides as Paleoenvironmental and Tectonic Archives (Dissertation (Ph.D.))

2018

• Hines, Sophia Katharine Vizza — Glacial Ocean Dynamics: Insight from Deep-Sea Coral Reconstructions and A Time-Dependent Dynamical Box Model (Dissertation (Ph.D.))
• Lloyd, Max Kaufmann — Clumped and Intramolecular Isotopic Perspectives on the Behavior of Organic and Inorganic Carbon in the Shallow Crust and Deep Biosphere (Dissertation (Ph.D.))
• Present, Theodore Michael — Controls on the Sulfur Isotopic Composition of Carbonate-Associated Sulfate (Dissertation (Ph.D.))

2017

• Cox, Stephen Ellis — New Techniques for Noble Gas Geochronometry and Thermochronometry (Dissertation (Ph.D.))
• Magyar, Paul Macdonald — Insights into Pathways of Nitrous Oxide Generation from Novel Isotopologue Measurements (Dissertation (Ph.D.))
• Subhas, Adam Vinay — Chemical Controls on the Dissolution Kinetics of Calcite in Seawater (Dissertation (Ph.D.))

2016

• Case, David Hamilton — Carbonate-Associated Microbial Ecology at Methane Seeps: Assemblage Composition, Response to Changing Environmental Conditions, and Implications for Biomarker Longevity (Dissertation (Ph.D.))

2013

• Channon, Melanie Beth — Oxygen Isotopes and Volatiles in Martian Meteorite (Dissertation (Ph.D.))
• Chemtob, Steven Michael — The Origin and Evolution of Amorphous Silica Coatings on Young Hawaiian Basalts (Dissertation (Ph.D.))
• Wicks, June Ki — Sound Velocities and Equation of State of Iron-Rich (Mg,Fe)O (Dissertation (Ph.D.))

2012

• Thiagarajan, Nivedita — Using Clumped Isotopes and Radiocarbon to Characterize Rapid Climate Change During the Last Glacial Cycle (Dissertation (Ph.D.))

2011

• Harrison, Benjamin Kimball — Microbial Colonization of Minerals in Marine Sediments – Method Development and Ecological Significance (Dissertation (Ph.D.))

2010

• Hofmann, Amy Elizabeth — Micron- to Sub-Micron-Scale Trace Element Zonations in Zircon and Olivine (Dissertation (Ph.D.))
• Wang, Ying — Equilibrium ²H/¹H Fractionations in Organic Molecules (Dissertation (Ph.D.))

2009

• Guo, Weifu — Carbonate Clumped Isotope Thermometry: Applications to Carbonaceous Chondrites and Effects of Kinetic Isotope Fractionation (Dissertation (Ph.D.))

2008

• Hebert, Laura Baker — (I) A Coupled Geochemical and Geodynamical Approach to Subduction Zone Modeling and (II) Development of Color in Greenish Quartz (Dissertation (Ph.D.))
• Yang, Zhonghua — Constraining Global Carbon Budget Using Vertically-Integrated CO₂ Measurements (Dissertation (Ph.D.))

2007

• Miller, Sarah Ann — Alkaline Earth Element Partitioning in Simplified Magmatic Systems (Dissertation (Ph.D.))
• O'Leary, Julie Ann — Hydrogen Isotope Geochemistry of the Mantle: Constraints from Back Arc Basin Basalts and Mantle Xenoliths (Dissertation (Ph.D.))

2006

• Eltgroth, Selene Farrell — Unraveling Deep-Ocean Connections to Climate with Deep-Sea Coral Records of Radiocarbon and Cd/Ca (Dissertation (Ph.D.))
• Krakauer, Nir Yitzhak — Characterizing Carbon-Dioxide Fluxes from Oceans and Terrestrial Ecosystems (Dissertation (Ph.D.))

2005

• Shuster, David Lawrence — Application of Spallogenic Noble Gases Induced by Energetic Proton Irradiation to Problems in Geochemistry and Thermochronometry (Dissertation (Ph.D.))
• Wang, Zhengrong — Oxygen Isotope Studies of the Petrogenesis of Hawaiian Lavas and a Theoretical Study on Equilibrium Thermodynamics of Multiply-Substituted Isotopologues (Dissertation (Ph.D.))

2003

• Johnson, Elizabeth Ann — Hydrogen in Nominally Anhydrous Crustal Minerals (Dissertation (Ph.D.))

2002

• Kessel, Ronit — The Activity of Chromite in Multicomponent Spinels: An Experimental Study with Implications for the Metamorphic History of Equilibrated Ordinary Chondrites (Dissertation (Ph.D.))
• Mukhopadhyay, Sujoy — I. Extraterrestrial ³He in the Sedimentary Record. II. Geochemistry of Shield Stage Lavas from Kauai, Hawaii (Dissertation (Ph.D.))

2001

• Goreva, Julia S. — Origin of Th/U Variations in Chondritic Meteorites (Dissertation (Ph.D.))
• Okin, Gregory Stewart — Wind, Driven Desertification: Process Modeling, Remote Monitoring, and Forecasting (Dissertation (Ph.D.))

2000

• Holt, Elizabeth Warner — ¹⁸O/¹⁶O Studies of Short-Lived (10-25 Year), Fumarolic (>500°C) Meteoric-Hydrothermal Events in the Outflow Sheets of Ash-Flow Tuffs (Dissertation (Ph.D.))

1998

• Herman, Robert Laird — In Situ Measurements of Chemical Tracers in the Stratosphere: CO, N₂O, and CH₄ (Dissertation (Ph.D.))

1996

• Anbar, Ariel David — I. Rhenium and Iridium in Natural Waters. II. Methyl Bromide: Ocean Sources, Ocean Sinks, and Climate Sensitivity. III. CO₂ Stability and Heterogeneous Chemistry in the Atmosphere of Mars (Dissertation (Ph.D.))

1995

• Leshin, Laurie Ann — The Abundance and Hydrogen Isotopic Composition of Water in SNC Meteorites: Implications for Water on Mars (Dissertation (Ph.D.))

1993

• Bell, David Ronald — Hydroxyl in mantle minerals (Dissertation (Ph.D.))
• Blank, Jennifer Glee — An experimental investigation of the behavior of carbon dioxide in rhyolitic melt (Dissertation (Ph.D.))

1991

• Erel, Yigal — Transport of Natural Lead and Cadmium in Rivers: Global Flux Implications (Dissertation (Ph.D.))

1990

• Blum, Joel David — Geochemistry and Resonance Ionization of Platinum-Group Elements (Dissertation (Ph.D.))
• Brigham, Cheryl A. — Isotopic Heterogeneity in Calcium-Aluminum-Rich Meteoritic Inclusions (Dissertation (Ph.D.))

1988

• Chang, Shih-Bin Robin — Bacterial Magnetite in Sedimentary Deposits and its Geophysical and Paleoecological Implication (Dissertation (Ph.D.))
• Edwards, Richard Lawrence — High Precision Thorium-230 Ages of Corals and the Timing of Sea Level Fluctuations in the Late Quaternary (Dissertation (Ph.D.))

1986

• Sams, David Bruce — U/Pb Zircon Geochronology, Petrology, and Structural Geology of the Crystalline Rocks of the Southernmost Sierra Nevada and Tehachapi Mountains, Kern County, California (Dissertation (Ph.D.))

1985

• Conca, James Louis — Differential Weathering Effects and Mechanisms (Dissertation (Ph.D.))
• Mattson, Stephanie Margaret — Optical Expressions of Ion-Pair Interactions in Minerals (Dissertation (Ph.D.))

1984

• Aines, Roger Deane — Trace Hydrogen in Minerals (Dissertation (Ph.D.))
• Piepgras, Donald John — The Isotopic Composition of Neodymium in the Marine Environment: Investigations of the Sources and Transport of Rare Earth Elements in the Oceans (Dissertation (Ph.D.))

1982

• Ng, Chihang Amy — I. Ancient Arctic Ice Does Not Contain Large Excesses of Natural Lead. II. Chronological Variations in Lead and Barium Concentrations and Lead Isotopic Compositions in Sediments of Four Southern California Off-Shore Basins (Dissertation (Ph.D.))

1981

• Criss, Robert Everett — An ¹⁸O/¹⁶O, D/H and K-Ar Study of the Southern Half of the Idaho Batholith (Dissertation (Ph.D.))
• Jones, John Hume — Studies of the Geochemical Similarity of Plutonium and Samarium and Their Implications for the Abundance of ²⁴⁴Pu in the Early Solar System (Dissertation (Ph.D.))

1980

• Benjamin, Timothy Miller — Experimental Actinide Element Partitioning Between Whitlockite, Apatite, Diopsidic Clinopyroxene, and Anhydrous Melt at One Bar and 20 Kilobars Pressure (Dissertation (Ph.D.))
• Burnett, Michael Welch — The Occurrence and Distribution of Ca, Sr, Ba, and Pb in Marine Ecosystems (Dissertation (Ph.D.))
• Jacobsen, Stein Bjørnar — Study of Crust and Mantle Differentiation Processes from Variations in Nd, Sr, and Pb Isotopes (Dissertation (Ph.D.))
• Yapp, Crayton Jeffery — The Variations and Climatic Significance of D/ H Ratios in the Carbon-Bound Hydrogen of Cellulose in Trees (Dissertation (Ph.D.))

1979

• Everson, Joel Earl — Regional Variations in the Lead Isotopic Characteristics of Late Cenozoic Basalts from the Southwestern United States (Dissertation (Ph.D.))
• Furst, Marian Judith — The Use of Boron Concentrations in Fossil Materials as a Paleosalinity Indicator (Dissertation (Ph.D.))
• Gromet, L. Peter — Rare Earths Abundances and Fractionations and their Implications for Batholithic Petrogenesis in the Peninsular Ranges Batholith, California, USA, and Baja California, Mexico (Dissertation (Ph.D.))
• Potter, Russell Marsh — The Tetravalent Manganese Oxides: Clarification of their Structural Variations and Relationships and Characterization of their Occurrence in the Terrestrial Weathering Environment as Desert Varnish and other Manganese Oxide Concentrations (Dissertation (Ph.D.))
• Smith, Stephen Pritchard — Studies of Noble Gases in Meteorites and in the Earth (Dissertation (Ph.D.))

1977

• Goldman, Don Steven — Crystal-Field and Mössbauer Applications to the Study of Site Distribution and Electronic Properties of Ferrous Iron in Minerals with Emphasis on Calcic Amphiboles, Orthopyoxene and Cordierite (Dissertation (Ph.D.))

1976

• Lambert, Steven Judson — Stable Isotope Studies of Some Active Hydrothermal Systems (Dissertation (Ph.D.))

1975

• Forester, Richard W. — ¹⁸O/¹⁶O and D/H Studies on the Interactions between Heated Meteoric Groundwaters and Igneous Intrusions: Western San Juan Mountains, Colorado, and the Isle of Skye, Scotland (Dissertation (Ph.D.))

1973

• Knauth, LeRoy Paul — Oxygen and Hydrogen Isotope Ratios in Cherts and Related Rocks (Dissertation (Ph.D.))

1971

• Wenner, David Bruce — Hydrogen and Oxygen Isotopic Studies of Serpentinization of Ultramafic Rocks (Dissertation (Ph.D.))

1970

• Lawrence, James Robert — O¹⁸/O¹⁶ and D/H Ratios of Soils, Weathering Zones, and Clay Deposits (Dissertation (Ph.D.))

1969

• Shieh, Yuch-Ning — Oxygen, Carbon, and Hydrogen Isotope Studies of Contact Metamorphism (Dissertation (Ph.D.))

1967

• Savin, Samuel Marvin — Oxygen and Hydrogen Isotope Ratios in Sedimentary Rocks and Minerals (Dissertation (Ph.D.))

1966

• Aronson, James Louis — The Geochronology of the Plutonic and Metamorphic Rocks of New Zealand (Dissertation (Ph.D.))

1965

• Garlick, George Donald — Oxygen Isotope Ratios in Coexisting Minerals of Regionally Metamorphosed Rocks (Dissertation (Ph.D.))

1963

• Banks, Philip Oren — Systematics of the Distribution of Uranium and Lead in Relation to the Petrology of the Mt. Rubidoux Granites, Riverside County, California. (Dissertation (Ph.D.))
• Duke, Michael B. — Petrology of the Basaltic Achondrite Meteorites (Dissertation (Ph.D.))

1962

• Hare, Peter Edgar — The Amino Acid Composition of the Organic Matrix of Some Recent and Fossil Shells of Some West Coast Species of Mytilus (Dissertation (Ph.D.))

1959

• Taylor, Hugh Pettingill — O¹⁸/0¹⁶ Ratios in Coexisting Minerals of Igneous and Metamorphic Rocks (Dissertation (Ph.D.))

1956

• Lovering, John Francis — Structural and Compositional Studies on Selected Phases of Iron and Stony-Iron Meteorites (Dissertation (Ph.D.))

1955

• Burnham, C. Wayne — Metallogenic Provinces of the Southwestern United States and Northern Mexico (Dissertation (Ph.D.))

1947

• Smith, Alexander — I. Control of Ore by Primary Igneous Structures: Porcher Island, British Columbia. II. Structural Petrology: Crestmore, California. III. The Geochemistry and Paragenesis of the Ores of the Cactus Mine, Kern County, California (Dissertation (Ph.D.))