A5027635214- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- Seismic Imaging and Inversion Techniques
- Geochemistry and Elemental Analysis
- Geological and Geophysical Studies
- Atmospheric and Environmental Gas Dynamics
- Paleontology and Stratigraphy of Fossils
- Reservoir Engineering and Simulation Methods
- Geomagnetism and Paleomagnetism Studies
- Marine and coastal ecosystems
- Geochemistry and Geologic Mapping
- Geological formations and processes
- earthquake and tectonic studies
- Marine and environmental studies
- Geophysics and Gravity Measurements
- Geological and Geochemical Analysis
- Groundwater and Isotope Geochemistry
- Hydraulic Fracturing and Reservoir Analysis
- Microbial Community Ecology and Physiology
- Isotope Analysis in Ecology
- Radioactive element chemistry and processing
- Heavy metals in environment
- Marine Biology and Ecology Research
Oklahoma State University
2015-2025
Expedition Technology (United States)
2024
Oklahoma State University Oklahoma City
2022-2023
Appalachian State University
2020-2021
University of California, Riverside
2011-2017
Newcastle University
2015
Max Planck Institute for Marine Microbiology
2009-2015
University of California System
2011
University of Bremen
2003-2005
Microbial life inhabits deeply buried marine sediments, but the extent of this vast ecosystem remains poorly constrained. Here we provide evidence for existence microbial communities in ~40° to 60°C sediment associated with lignite coal beds at ~1.5 2.5 km below seafloor Pacific Ocean off Japan. methanogenesis was indicated by isotopic compositions methane and carbon dioxide, biomarkers, cultivation data, gas compositions. Concentrations indigenous cells 1.5 ranged from <10 ~10(4) cm(-3)....
Abstract Here, we present results from sediments collected in the Argentine Basin, a non‐steady state depositional marine system characterized by abundant oxidized iron within methane‐rich layers due to sediment reworking followed rapid deposition. Our comprehensive inorganic data set shows that reduction these sulfate and sulfide‐depleted is best explained microbially mediated process—implicating anaerobic oxidation of methane coupled (Fe‐ AOM ) as most likely major mechanism. Although...
Integrated Ocean Drilling Program (IODP) Expedition 316 Sites C0006 and C0007 examined the deformation front of Nankai accretionary prism offshore Kii Peninsula, Japan. In drilling area, frontal thrust shows unusual behavior as compared to other regions Trough. results, integrated with observations from seismic reflection profiles, suggest that has been active since ∼0.78–0.436 Ma accommodated ∼13 34% estimated plate convergence during time. The remainder likely distributed among...
Abstract Successful chemotherapeutic intervention for management of lung cancer requires an efficient drug delivery system. Gold nanoparticles (GNPs) can incorporate various therapeutics; however, GNPs have limitations as carriers. Nano-sized cellular vesicles like exosomes (Exo) ferry GNP-therapeutic complexes without causing any particle aggregation or immune response. In the present study, we describe development and testing a novel Exo-GNP-based therapeutic system -‘nanosomes’- therapy....
The interplay between sediment deposition patterns, organic matter type and the quantity quality of reactive mineral phases determines accumulation, speciation isotope composition pore water solid phase sulfur constituents in marine sediments. Here, we present geochemistry siliciclastic sediments from two sites along Argentine continental slope—a system characterized by dynamic reworking, which result non-steady state conditions. investigated have different depositional histories but common...
Iron speciation and trace metal proxies are commonly applied together in efforts to identify anoxic settings marked by the presence of free sulfide (euxinia) or dissolved iron (ferruginous) water column. Here, we use a literature compilation from modern localities provide new empirical evaluation coupled Fe Mo concentrations as proxy for pore accumulation at non-euxinic localities. We also present speciation, concentration, S isotope data Friends Anoxic Mud (FOAM) site Long Island Sound,...
The modern Baltic Sea is the world9s largest anthropogenically forced anoxic basin. Using integrated geochemical records collected during Integrated Ocean Drilling Program (IODP) Expedition 347 from deepest and one of most reducing sub-basins in Sea, Landsort Deep, we explore degree frequency natural anoxia through Holocene. A marked decrease carbon-to-sulfur ratios (C/S) cores indicate transition Ice Lake to current brackish sea, which occurred about 8.5 kyrs B.P. Following this,...
The deep oceans are environments of complex carbon dynamics that have the potential to significantly impact global cycle. However, role hadal zones, particularly trenches (water depth > 6 km), in oceanic dissolved organic (DOC) cycle is not thoroughly investigated. Here we report distinct DOC signatures Japan Trench bottom water. We find up 34% ± 7% trench removed during northeastward transport along axis. This removal increases overall recalcitrance Pacific pool, and potentially enhanced by...
The 2011 Tohoku-Oki earthquake highlighted substantial deficiencies in our understanding and an underestimation of the hazard potential megathrust earthquakes their cascading effects, including tsunamis. Offshore deep-sea paleoseismology evolved from need to better understand mechanisms depositional processes within subduction zones. examination sedimentary records has demonstrated effectiveness reconstructing complex historical seismic events resulting multi-pulse sequences. However,...
Abstract The nitrogen isotopic composition of diatom frustule‐bound organic matter (δ 15 N DB ) is often used to study changes in high latitude biological pump efficiency across glacial‐interglacial cycles, but the proxy may be biased by species‐specific effects. genus Chaetoceros particular interest because its abundance throughout ocean basins, shifting biogeography during glacial periods, and ability many species form heavily silicified resting spores. Here we investigate how spores (CRS)...
Research Article| September 01, 2010 Oxidative sulfur cycling in the deep biosphere of Nankai Trough, Japan N. Riedinger; Riedinger * 1Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359 Bremen, Germany *Current address: Department Earth Sciences, Biogeochemistry, University California–Riverside, 900 Avenue, Riverside, California 92521-0432, USA; E-mail: natascha.riedinger@ucr.edu. Search other works by this author on: GSW Google Scholar B. Brunner; Brunner M.J. Formolo;...