A5057492676- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Geological and Geophysical Studies
- Astro and Planetary Science
- Spacecraft and Cryogenic Technologies
- Hydrocarbon exploration and reservoir analysis
- Offshore Engineering and Technologies
- Seismic Imaging and Inversion Techniques
- Astronomical Observations and Instrumentation
- Geological formations and processes
- Geomagnetism and Paleomagnetism Studies
- Planetary Science and Exploration
- Geological Modeling and Analysis
- Geophysics and Gravity Measurements
- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Scientific Research and Discoveries
- Atmospheric and Environmental Gas Dynamics
- Geological Studies and Exploration
- Marine and environmental studies
- Paleontology and Stratigraphy of Fossils
- Solar and Space Plasma Dynamics
- Cryospheric studies and observations
- Nuclear Physics and Applications
- Geochemistry and Geologic Mapping
Texas A&M University
2014-2024
Discovery Place
2014-2023
Scripps Institution of Oceanography
2023
University of California, San Diego
2023
Centre National pour la Recherche Scientifique et Technique (CNRST)
2023
Institut Universitaire Européen de la Mer
2023
Mitchell Institute
2021-2023
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2021
Durham University
2021
International Ocean Discovery Program
2016-2020
Abstract. The Paleocene–Eocene Thermal Maximum (PETM, ~ 56 Ma) was a 200 kyr episode of global warming, associated with massive injections 13C-depleted carbon into the ocean–atmosphere system. Although climate change during PETM is relatively well constrained, effects on marine oxygen concentrations and nutrient cycling remain largely unclear. We identify in sediment core from US margin Gulf Mexico. Biomarker-based paleotemperature proxies (methylation branched tetraether–cyclization...
Slow slip events (SSEs) accommodate a significant proportion of tectonic plate motion at subduction zones, yet little is known about the faults that actually host them. The shallow depth (<2 km) well-documented SSEs Hikurangi zone offshore New Zealand offers unique opportunity to link geophysical imaging with direct access incoming material represents megathrust fault rocks hosting slow slip. Two recent International Ocean Discovery Program Expeditions sampled this before it entrained...
Significance In coastal Alaska and the St. Elias orogen, over past 1.2 million years, mass flux leaving mountains due to glacial erosion exceeds plate tectonic input. This finding underscores power of climate in driving rates, potential feedback mechanisms linking climate, erosion, tectonics, complex nature climate−tectonic coupling transient responses toward longer-term dynamic equilibration landscapes with ever-changing environments.
Prior to ~1 million years ago (Ma), variations in global ice volume were dominated by changes obliquity; however, the role of precession remains unresolved. Using a record North Atlantic rafting spanning past 1.7 years, we find that onset within given glacial cycle (reflecting sheet expansion) consistently occurred during times decreasing obliquity whereas mass wasting (ablation) events tied minima precession. Furthermore, our results suggest ubiquitous association between precession-driven...
Abstract Geophysical observations show spatial and temporal variations in fault slip style on shallow subduction thrust faults, but geological signatures underlying deformation processes remain poorly understood. International Ocean Discovery Program (IODP) Expeditions 372 375 investigated New Zealand’s Hikurangi margin a region that has experienced both tsunami earthquakes repeated slow-slip events. We report direct from cores sampled the active Pāpaku splay at 304 m below seafloor. This...
International Ocean Discovery Program (IODP) Expedition 395 recovered near-continuous sedimentary records from several major contourite drift bodies in the North Atlantic Ocean. These drifts deposits are influenced by deep-water currents, and studying their composition can inform us on past changes ocean circulation. Drift sedimentation is a dynamic process that lead to spatial variation deposition preservation through time. Here, we correlate glacial-interglacial timescale new IODP with...
Reconstructing the North Atlantic Deep Water (NADW) formation and strength over time is fundamental to understanding global ocean circulation climate evolution. A multi-proxy approach on sedimentary core records can provide temporal resolution needed investigate NADW history for last 12 Ma (from Upper Miocene Pleistocene).Here, we focus Bj&#246;rn Drift, located in eastern flank of Reykjanes Ridge, where accumulation rate provenance sediment Iceland-Scotland Overflow (ISOW) path are...
Abstract The Pāpaku Fault Zone, drilled at International Ocean Discovery Program (IODP) Site U1518, is an active splay fault in the frontal accretionary wedge of Hikurangi Margin. In logging‐while‐drilling data, 33‐m‐thick zone exhibits mixed modes deformation associated with a trend downward decreasing density, P ‐wave velocity, and resistivity. Methane hydrate observed from ~30 to 585 m below seafloor (mbsf), including within surrounding zone. Hydrate accumulations are vertically...