A5078094441- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Petroleum Processing and Analysis
- Atmospheric and Environmental Gas Dynamics
- Paleontology and Stratigraphy of Fossils
- Analytical Chemistry and Chromatography
- Isotope Analysis in Ecology
- Geological Studies and Exploration
- Polar Research and Ecology
- Geological formations and processes
- Toxic Organic Pollutants Impact
- Oil Spill Detection and Mitigation
- Geological and Geochemical Analysis
- Cryospheric studies and observations
- Plant Diversity and Evolution
- Geochemistry and Geologic Mapping
- Mass Spectrometry Techniques and Applications
- Metabolomics and Mass Spectrometry Studies
- Radioactive element chemistry and processing
- Microbial bioremediation and biosurfactants
- Marine and coastal ecosystems
- NMR spectroscopy and applications
- Carbon Dioxide Capture Technologies
- Enhanced Oil Recovery Techniques
Saint Mary's University
2018-2025
GNS Science
2012-2025
Woods Hole Oceanographic Institution
2007-2021
University of New Brunswick
2021
St. Mary's University
2018
University of Oxford
2010-2015
Cambridge University Press
2009-2011
New York University Press
2009-2011
University of Illinois Chicago
2003-2008
Schlumberger (United States)
2007-2008
Quantitative information regarding the endmember composition of gas and oil that flowed from Macondo well during Deepwater Horizon spill is essential for determining flow rate, total volume released, trajectories fates hydrocarbon components in marine environment. Using isobaric gas-tight samplers, we collected discrete samples directly above on June 21, 2010, analyzed oil. We found fluids flowing had a gas-to-oil ratio 1,600 standard cubic feet per petroleum barrel. Based measured Federally...
Recently, asphaltenes have been shown to form nanoaggregates in toluene at very low concentrations (10−4 mass fraction). Subsequently, situ analysis of a 3000 ft vertical column crude oil by downhole fluid (DFA) indicated that the black exhibit gravitational sedimentation according Boltzmann distribution and asphaltene colloidal size is ∼2 nm. Here, we perform follow-up study reservoir from different field. The 658 analyzed DFA advanced laboratory analytical chemical methods. An particle...
Highly cracked and isomerized archaeal lipids bacterial lipids, structurally changed by thermal stress, are present in solvent extracts of 2,707- to 2,685-million-year-old (Ma) metasedimentary rocks from Timmins, ON, Canada. These appear conventional gas chromatograms as unresolved complex mixtures include cyclic acyclic biphytanes, C 36 –C 39 derivatives the 31 35 extended hopanes. Biphytane hopanes also found high-pressure catalytic hydrogenation products released solvent-extracted...
Natural seeps contribute nearly half of the oil entering coastal ocean. However, environmental fate studies generally monitor fewer than 5% these petroleum compounds. Hence, rates and relevance physical, chemical, biological weathering processes are unknown for large majority hydrocarbons, both released from natural also human activities. To investigate specific compositional changes occurring in during subsurface degradation submarine seepage, we studied offshore Santa Barbara, California...
A pseudohomologous series of branched aliphatic alkanes with a quaternary substituted carbon atom (BAQCs, specifically 2,2-dimethylalkanes and 3,3- 5,5-diethylalkanes) were identified in warm (65°C) deep-sea hydrothermal waters Late Cretaceous black shales. 5,5-Diethylalkanes also observed modern Holocene marine shelf sediments shales spanning the last 800 million years geological record. The number distribution BAQCs indicates biological origin. These compounds but not previous studies 2.0...
Deep sea cold seeps are sites where hydrogen sulfide, methane, and other hydrocarbon-rich fluids vent from the ocean floor. They an important component of Earth’s carbon cycle in which subsurface hydrocarbons form energy source for highly diverse benthic micro- macro-fauna what is otherwise vast spartan scape. Passive continental margin typically attributed to migration generated deeply buried rocks. Many these occur over salt tectonic provinces, movement generates complex fault systems that...
Abstract. Antarctica’s terrestrial ecosystems are at risk from a rapidly changing climate. Investigating how vascular plants responded to major climatic variations in the geological past, especially under atmospheric CO2 values similar modern and future projections, may provide insight into organisms could migrate across continent as conditions change. Here, we investigate vegetation trends Oligocene/Miocene Transition (OMT, ~23 Myr), one of largest transient glaciations Cenozoic. Despite...
Abstract. The Scotian Slope in the North Atlantic Ocean extends ~500 km along coast of Nova Scotia, Canada, descending from 400 m to 5 water depth. With a maximum sediment thickness ~24 km, large portions deeper basin are affected by salt tectonism, which has greatly impacted stratigraphy and locally facilitated hydrocarbon seepage ocean seafloor. surface sediments slope may therefore be home microbial communities, respond complex geochemical drivers that not only include communication with...
One of the largest problems facing oil industry today is to characterize fluid and architectural complexities reservoirs. This applies particularly in development offshore fields where reservoir reconnaissance impeded by high costs wells, often exceeding $100 million. As such, new methods are being developed address these complexities. Downhole analysis (DFA) a method in-situ characterization used understand heterogeneous distributions hydrocarbon fluids identify which crude oils merit...