A5004899767- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Geology and Paleoclimatology Research
- Groundwater and Isotope Geochemistry
- Geological and Geochemical Analysis
- CO2 Sequestration and Geologic Interactions
- Geological Studies and Exploration
- Astro and Planetary Science
- earthquake and tectonic studies
- Reservoir Engineering and Simulation Methods
- Cryospheric studies and observations
- Geochemistry and Geologic Mapping
- Groundwater flow and contamination studies
- Spacecraft and Cryogenic Technologies
- Landslides and related hazards
- Hydraulic Fracturing and Reservoir Analysis
- Ocean Acidification Effects and Responses
- Oceanographic and Atmospheric Processes
- Radioactivity and Radon Measurements
- Climate variability and models
- Isotope Analysis in Ecology
- Seismic Imaging and Inversion Techniques
- Marine and coastal ecosystems
- Metal Extraction and Bioleaching
Woods Hole Oceanographic Institution
2022-2025
University of Manchester
2024-2025
University of Oxford
2018-2022
Imperial College London
2016
Abstract Carbon capture and storage (CCS) is a key technology to mitigate the environmental impact of carbon dioxide (CO 2 ) emissions. An understanding potential trapping mechanisms required provide confidence in safe secure CO geological sequestration 1,2 . Depleted hydrocarbon reservoirs have substantial 1 , 3 numerous undergone injection as means enhanced oil recovery -EOR), providing an opportunity evaluate (bio)geochemical behaviour injected carbon. Here we present noble gas, stable...
Abstract The Paradox Basin in the Colorado Plateau (USA) has some of most iconic records paleofluid flow, including sandstone bleaching and ore mineralization, hydrocarbon, CO2, He reservoirs, yet sources fluids responsible for these extensive fluid-rock reactions are highly debated. This study, first time, characterizes within basin to constrain emergent behavior flow resulting rock records. Major ion isotopic (δ18Owater; δDwater; δ18OSO4; δ34SSO4; δ34SH2S; 87Sr/86Sr) signatures formation...
Geochemical data from 40 water wells were used to examine the occurrence and sources of radium (Ra) in groundwater associated with three oil fields California (Fruitvale, Lost Hills, South Belridge). 226Ra+228Ra activities (range = 0.010-0.51 Bq/L) exceeded 0.185 Bq/L drinking-water standard 18% (not wells). Radium correlated TDS concentrations (p < 0.001, ρ 0.90, range 145-15,900 mg/L), Mn + Fe 0.82, <0.005-18.5 pH -0.67, 6.2-9.2), indicating Ra was influenced by salinity, redox, pH....
Abstract Krypton‐81 dating provides new insights into the timing, mechanisms, and extent of meteoric flushing versus retention saline fluids in subsurface response to changes geologic and/or climatic forcings over 50 ka 1.2 Ma year timescales. Remnant Paleozoic seawater‐derived brines associated with evaporites Paradox Basin, Colorado Plateau, are beyond 81 Kr range (>1.2 Ma) have likely been preserved due negative fluid buoyancy low permeability. formation waters above indicates...
Continental glaciations during the Pleistocene Epoch created complex systems of aquifers and aquitards across many northern regions Earth. The low hydraulic conductivities glacial till suggest that limited recharge will reach underlying aquifers, potentially preserving old groundwaters. Here, we characterize history in intertill buried valley Saskatchewan, Canada using
Nitrogen plays a critical role in maintaining Earth's hospitable surface environment over geological time. Despite our atmosphere being dominated by nitrogen, understanding of how nitrogen was delivered to Earth and subsequent planetary processes modified budget through time is currently lacking. Here, we report measurements isotopologues N2 (Δ30), along with ultrahigh precision Ar, Kr, Xe isotopes, hydrothermal gas samples from Yellowstone National Park. We show that δ15N variations are...
Fluids such as 4He, H2, CO2 and hydrocarbons accumulate within Earth's crust. Crustal reservoirs also have potential to store anthropogenic waste (e.g., CO2, spent nuclear fuel). Understanding fluid migration how this is impacted by basin stratigraphy evolution key exploiting accumulations identifying viable storage sites. Noble gases are powerful tracers of chemical evolution, they inert only fractionate physical processes. The distribution in particular, an important tool for understanding...
Gas exchange between the atmosphere and ocean interior profoundly impacts global climate biogeochemistry. However, our understanding of relevant physical processes remains limited by a scarcity direct observations. Dissolved noble gases in deep are powerful tracers air-sea interaction due to their chemical biological inertness, yet isotope ratios have remained underexplored. Here, we present high-precision gas elemental from North Atlantic (~32°N, 64°W) evaluate parameterizations using an...
To inform cost-effective monitoring of offshore geological storage carbon dioxide (CO2), a unique field experiment, designed to simulate leakage CO2 from sub-seafloor reservoir, was carried out in the central North Sea. A total 675 kg were released into shallow sediments (∼3 m below seafloor) for 11 days at flow rates between 6 and 143 d-1. set natural, inherent tracers (13C, 18O) injected added, non-toxic tracer gases (octafluoropropane, sulfur hexafluoride, krypton, methane) used test...
Testing water samples for arsenic contamination has become an important quality issue worldwide. Arsenic usually occurs in very small concentrations, and a sensitive analytical method is needed. We present here 1-day laboratory module developed to introduce Earth Sciences and/or Chemistry student undergraduates key aspects of this topical issue. In practical session, students were first introduced the worldwide problems groundwaters as motivation experimental work. The latter consisted...
Noble gases record fluid interactions in multiphase subsurface environments through fractionation processes during equilibration. Water the presence of hydrocarbons at acquires a distinct elemental signature due to difference solubility between these two fluids. We find atmospheric noble gas produced water is partially preserved after production and disposal unlined ponds surface. This from meteoric can be used trace oil-field seepage into groundwater aquifers. analyse (n = 30) pond 2)...
Abstract Hydrocarbon systems with declining or viscous oil production are often stimulated using enhanced recovery (EOR) techniques, such as the injection of water, steam, and CO 2 , in order to increase gas production. As EOR other methods enhancing hydraulic fracturing have become more prevalent, environmental concerns about impact both new historical hydrocarbon on overlying shallow aquifers increased. Noble isotopes powerful tracers subsurface fluid provenance can be used understand...
In regions where water resources are scarce and in high demand, it is important to safeguard against contamination of groundwater aquifers by oil-field fluids (water, gas, oil). this context, the geochemical characterisation these critical so that anthropogenic contaminants can be readily identified. The first step characterising pre-development fluid signatures (i.e., those unmodified hydrocarbon resource development) understanding how may have been perturbed production, particularly...
Noble gases are widely used as physically based climate proxies, notably in dissolved water samples tracers of past recharge temperature groundwater and air-sea gas exchange processes seawater. Recent advances measuring large-volume noble isotopic ratios at high precision have expanded the range parameters that can be interpreted.We build on prior methods for stable isotopes with a new equilibration (LVE) method wherein sample equilibrated flask between phase headspace. The original...
Abstract Nitrogen (N) dominates Earth's atmosphere (78% N 2 ) but occurs in trace abundances silicate minerals, making it a sensitive tracer of recycled surface materials into the mantle. The mechanisms controlling transfer between terrestrial reservoirs remain uncertain because low mineral‐hosted fluid inclusions (FIs) are difficult to measure. Using new techniques, we analyzed and He isotope compositions olivine‐ pyroxene‐hosted FIs from arc volcanoes Southern Chile, Cascadia, Central...