A5000404492- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Paleontology and Stratigraphy of Fossils
- Astro and Planetary Science
- Geochemistry and Elemental Analysis
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Planetary Science and Exploration
- Radioactive element chemistry and processing
- Avian ecology and behavior
- Mineralogy and Gemology Studies
- Geological Studies and Exploration
- Isotope Analysis in Ecology
- Geomagnetism and Paleomagnetism Studies
- Analytical chemistry methods development
- Space Exploration and Technology
- Laser-induced spectroscopy and plasma
- Heavy metals in environment
- Geological and Geophysical Studies Worldwide
- Thallium and Germanium Studies
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Forest Ecology and Biodiversity Studies
Rice University
2016-2025
Planetary Science Institute
1999-2023
Bridge University
2019
Harvard University
1999-2019
University of Cambridge
2019
The University of Texas Health Science Center at Houston
2016
National Yang Ming Chiao Tung University
2013
University of Houston
2010
University of California, Los Angeles
2003
California Institute of Technology
2001-2003
Arc magmas are important building blocks of the continental crust. Because many arc lavas oxidized, continent formation is thought to be associated with oxidizing conditions. On basis copper's (Cu's) affinity for reduced sulfur phases, we tracked redox state from mantle source emplacement in Primary and mid-ocean ridge basalts have identical Cu contents, indicating that states primitive indistinguishable basalts. During magmatic differentiation, content most decreases markedly because...
Continents, especially their Archean cores, are underlain by thick thermal boundary layers that have been largely isolated from the convecting mantle over billion-year timescales, far exceeding life span of oceanic layers. This longevity is promoted fact continents highly melt-depleted peridotites, which result in a chemically distinct layer intrinsically buoyant and strong (owing to dehydration). chemical counteracts destabilizing effect cold state continents. The compositions cratonic...
V/Sc systematics in peridotites, mid-ocean ridge basalts and arc are investigated to constrain the variation of fO2 asthenospheric mantle. ratios used here ‘see through’ those processes that can modify barometric determinations mantle rocks and/or magmas: early fractional crystallization, degassing, crustal assimilation metasomatism. Melting models combined with a literature database on lavas basalts, along new, more precise data peridotites selected lavas. primitive from Cascades magmatic...
Erosion overwhelmed by eruption Volcanism and erosion can feed into long-term climate change, but determining their relative importance is challenging. known to be a carbon sink thought play an outsized role in shifting global climate. However, McKenzie et al. suggest that oscillations may tied the amount of continental arc volcanism (see Perspective Kump). A compilation volcano-produced zircons over past 700 million years revealed good correlation between warm cool epochs with waxing waning...
The two most important magmatic differentiation series on Earth are the Fe-enriching tholeiitic series, which dominates oceanic crust and island arcs, Fe-depleting calc-alkaline continental arcs. It is well known that magmas more oxidized when they erupt preferentially found in regions of thick crust, but why these quantities should be related remains unexplained. We use redox-sensitive behavior europium (Eu) deep-seated, plagioclase-free arc cumulates to directly constrain redox evolution...
Densities and elastic properties of solid natural spinel‐ garnet‐peridotite samples ( n = 133) at standard temperature T ) pressure P (STP) conditions were calculated for compositions ranging from Mg# (100 × Mg/(Mg + Fe)) 86–94. The physical used to investigate how compositional variations control density seismic velocity. A corresponding set derivatives d / Mg#) velocity is provided. Because the moduli are very similar different end‐members peridotitic minerals, variation with STP holds...
Nominally anhydrous minerals (e.g., olivine, clinopyroxene, and orthopyroxene) in peridotite xenoliths collected from the Colorado Plateau southern Basin Range western North America were systematically analyzed by Fourier transform infrared spectroscopy for water contents. Measured contents range 2 to 45 ppm 53 402 orthopyroxene, 171 957 clinopyroxene. The has highest (up H O clinopyroxene), while San Carlos lowest 4 82 178 clinopyroxene). With exception of Carlos, olivine pyroxenes all...
Doppler weather radar imaging enabled the rapid recovery of Sutter's Mill meteorite after a rare 4-kiloton TNT-equivalent asteroid impact over foothills Sierra Nevada in northern California. The recovered meteorites survived record high-speed entry 28.6 kilometers per second from an orbit close to that Jupiter-family comets (Tisserand's parameter = 2.8 ± 0.3). is regolith breccia composed CM (Mighei)-type carbonaceous chondrite and highly reduced xenolithic materials. It exhibits...