A5089482351- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- Nuclear materials and radiation effects
- Hydraulic Fracturing and Reservoir Analysis
- Geochemistry and Geologic Mapping
- Nuclear Materials and Properties
- Astro and Planetary Science
- Glass properties and applications
- Seismic Imaging and Inversion Techniques
- Drilling and Well Engineering
- Radioactive element chemistry and processing
- Hydrocarbon exploration and reservoir analysis
- Planetary Science and Exploration
- CO2 Sequestration and Geologic Interactions
- Rock Mechanics and Modeling
- Groundwater flow and contamination studies
- Nuclear and radioactivity studies
- Clay minerals and soil interactions
- Geochemistry and Elemental Analysis
- Paleontology and Stratigraphy of Fossils
- Landslides and related hazards
- Geomagnetism and Paleomagnetism Studies
- Graphite, nuclear technology, radiation studies
Lawrence Livermore National Laboratory
2013-2022
Institut de physique du globe de Paris
2012-2021
Lawrence Livermore National Security
2003-2020
Université Paris Cité
2013-2015
Centre National de la Recherche Scientifique
2015
Sorbonne Paris Cité
2015
Geological Society of America
2006
Czech Academy of Sciences, Institute of Geophysics
2003-2005
Underground Systems (United States)
2003
Office of Scientific and Technical Information
2003
Our ability to calculate the depths and temperatures at which magmas partially crystallize can prove crucial as petrologists test hypotheses of magma transport evolution. Yet whereas numerous arguments involve hydrous SiO2-rich volcanic products, current clinopyroxene-liquid thermobarometers have been calibrated only from basaltic liquid compositions. To remedy this deficiency, new using experiments that include hydrated (water-undersaturated) liquids ranging 71.3 wt% SiO2. As with prior...
Late Pleistocene–Holocene sinistral slip-rates on several segments of the Kunlun Fault in northeastern Tibet have been determined. These determinations are based measured displacement alluvial surfaces whose surface ages were determined by cosmogenic 26Al and 10Be dating quartz pebbles, 14C charcoal. In west, at three sites along Xidatan–Dongdatan segment fault, near 94uE, terrace riser offsets ranging from 24 to 110 m, with ∼1800 ∼8200 yr, yield a mean left-lateral slip-rate 11.7±1.5 mm...
Earth's Ingredients What was the composition of earliest terrestrial starting blocks? The answer lies in understanding how interior separated into mantle and core components. Siebert et al. (p. 1194 , published online 10 January) performed a series high pressure temperature experiments to track chromium vanadium, which have slight affinity for iron, partition metal silicate fractions. Combined with accretionary models, data suggest that Earth accreted under same relatively oxidizing...
Summary This paper describes a fully coupled finite element/finite volume approach for simulating field‐scale hydraulically driven fractures in three dimensions, using massively parallel computing platforms. The proposed method is capable of capturing realistic representations local heterogeneities, layering and natural fracture networks reservoir. A detailed description the numerical implementation provided, along with studies comparing model both analytical solutions experimental results....
Geologic investigations of how the Tibetan plateau is currently deforming have focused primarily on its boundary faults. Consequently, interior deforms remains poorly understood. To fill this gap in knowledge, we conducted field mapping, analysis remote sensing and digital topographic data, reinterpretation existing geologic maps central Tibet. This study reveals a 200–300 km wide 1500–1800 long east trending zone conjugate strike‐slip faults across The Tibet fault comprised northeast...
To better constrain the ongoing rates of deformation in northern Tibet, ages fluvial and glacial geomorphic markers left‐laterally displaced by Altyn Tagh Fault have been determined radiocarbon 10 Be‐ 26 Al cosmic ray exposure dating. Two sites were investigated: Cherchen He Sulamu Tagh, both near Tura (∼37.6°N, 86.6°E). The are geomorphologically distinct with dominated processes action. Nine offsets ranging from 166 to 3660 m between 6 113 ka yield an average slip rate 26.9 ± 6.9 mm/yr....
The relationship between the rheology and phase equilibria of a picritic basalt from Kilauea Iki has been investigated at 1 atm along QFM buffer. Between 1270° 1180°C olivine minor spinel are only liquidus phases, melt volume decreases 85 to 74 vol %. At ol‐sp‐pc‐cpx cotectic, is consumed more rapidly dropping 47 % 1139°C. magma non‐Newtonian, characterized by time‐dependent, pseudoplastic behavior, consistent with power law flow or Bingham behavior. Non‐Newtonian effects most apparent when...
Significance We combine, for the first time to our knowledge, two approaches study Earth’s core composition: a geochemical approach based on trace element depletion in mantle and geophysical seismically lighter faster (than pure iron−nickel) core. The joint allows making strong statements; of all, as opposed current belief, Earth must have accreted material that is more oxidized than present-day mantle, similar planetesimals such 4-Vesta, got reduced its present state during formation....