A5054476592- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Geochemistry and Geologic Mapping
- Mercury impact and mitigation studies
- Petroleum Processing and Analysis
- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Hydraulic Fracturing and Reservoir Analysis
- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
- Heavy metals in environment
- Geochemistry and Elemental Analysis
- Coal and Its By-products
- Enhanced Oil Recovery Techniques
- Isotope Analysis in Ecology
- Geological and Geophysical Studies
- Toxic Organic Pollutants Impact
- Geological and Geochemical Analysis
- Coal Properties and Utilization
- Radioactive element chemistry and processing
- Lichen and fungal ecology
- Soil Carbon and Nitrogen Dynamics
- Mine drainage and remediation techniques
- Geological formations and processes
- CO2 Sequestration and Geologic Interactions
Aarhus University
2016-2025
Tianjin University
2023
Utrecht University
2023
Science Oxford
2023
University of Oxford
2023
Weatherford College
2023
Natural Resources Canada
2007-2022
Geological Survey of Canada
2010-2020
University of Calgary
2011-2017
Regionshospitalet Herning
2016
Research Article| January 01, 2012 Latest Permian mercury anomalies Hamed Sanei; Sanei * 1Geological Survey of Canada, 3303-33rd Street NW, Calgary, Alberta T2L2A7, Canada2Department Geoscience, University 2500 Drive T2N 1N4, Canada *E-mail: hsanei@nrcan.gc.ca. Search for other works by this author on: GSW Google Scholar Stephen E. Grasby; Grasby Benoit Beauchamp 2Department Geology (2012) 40 (1): 63–66. https://doi.org/10.1130/G32596.1 Article history received: 27 Jun 2011 rev-recd: 22 Aug...
Strata of Permian – Early Triassic age that include a record three major extinction events (Capitanian Crisis, Latest Extinction and the Smithian/Spathian Extinction) were examined at Festningen section, Spitsbergen. Over c. 12 Ma examined, mercury in sediments shows relatively constant background values 0.005–0.010 μg g–1. However, there are notable spikes Hg concentration over an order magnitude above associated with extinctions. The Hg/total organic carbon (TOC) ratio similar large...
Abstract Accurate estimation of biochar carbon permanence is essential for assessing its effectiveness as a dioxide removal (CDR) strategy. The widely adopted framework, based on the two-pool exponential decay model, forms basis policy guidelines and national CDR accounting. However, our re-analysis meta-data used in this model reveals significant deficiencies parameterization, leading to two critical issues. First, current parameterization assigns disproportionally low percentage labile...
Climate warming in the 20th Century has had profound effects on limnology of High Arctic lakes, including substantial increases autochthonous primary productivity (APP). Here, we report organic carbon and Hg core profiles from two lakes which support hypothesis that sedimentary at these latitudes were largely driven by APP increases, via scavenging algae and/or suspended detrital algal matter. Hydrocarbons quantitatively released thermal cracking algal-derived matter ("S2" carbon) used to...
Research Article| February 01, 2013 Recurrent Early Triassic ocean anoxia S.E. Grasby; Grasby 1Geological Survey of Canada–Calgary, Natural Resources Canada, 3303 33rd Street N.W., Calgary, Alberta T2L 2A7, Canada2Department Geosciences, University 2500 Drive T2N 1N4, Canada Search for other works by this author on: GSW Google Scholar B. Beauchamp; Beauchamp 2Department A. Embry; Embry H. Sanei Geology (2013) 41 (2): 175–178. https://doi.org/10.1130/G33599.1 Article history received: 07 May...
The temporal patterns of mercury (Hg), polychlorinated biphenyls (PCBs), and other contaminants in Arctic aquatic biota are usually attributed to changing atmospheric sources. However, climate variability change is another means altering contaminant fate bioavailability. We show here that the concentrations Hg PCBs Mackenzie River burbot (Lota lota), a top predator fish important staple food for northern Canadian communities, have increased significantly over last 25 years despite falling or...
Genetically deformed plant spores indicate that mercury toxicity played a part in the mass extinction 201 million years ago.
Sulfidogenic biochemical reactors for metal removal that use complex organic carbon have been shown to be effective in laboratory studies, but their performance the field is highly variable. Successful operation depends on types of microorganisms supported by matrix, and factors affecting community composition are unknown. A molecular survey a field-based reactor had removing zinc arsenic over six years revealed microbial was dominated methanogens related Methanocorpusculum sp....
Abstract This paper presents a new schematic model for generation and timing of multiple phases solid bitumen throughout the continuum organic matter maturation in source tight reservoir rocks. Five distinct stages evolution are proposed: (1) diagenetic (or degraded bituminite ), which is not secondary maceral resulting from thermal cracking kerogen. Instead it derived degradation diagenesis stage (Ro < 0.5%); (2) initial-oil , consolidated form early catagenetically generated at...
Summary The abundant hydrocarbon resources in low-permeability formations are now technically accessible because of advances the drilling and completion multilateral/multifractured horizontal wells. However, measurement modeling petrophysical properties, required for reserves estimation reservoir-engineering calculations, remaining challenges development tight formations. In particular, characterizing wettability (wetting affinity) rocks is challenging their complex pore structure, which can...
Abstract The deepest part of the global ocean, hadal trenches, are considered to act as depocenters for organic material. Relatively high microbial activity has been demonstrated in sections some but deposition dynamics thought be spatially and temporally variable. Here, we explore sediment characteristics in-situ benthic oxygen uptake along two trenches with contrasting surface primary productivity: Kermadec Atacama trenches. We find that consumption varies by a factor about 10 between...
Burial of persistent organic pollutants (POPs) such as polychlorinated biphenyls (PCBs) in deep-sea sediments contributes to 60% their historical emissions. Yet, empirical data on occurrence the deep-ocean is scarce. Estimates POP sink are therefore uncertain. Hadal trenches, representing deepest part ocean, hotspots for carbon burial and decomposition. POPs favorably partition carbon, making trenches likely significant sinks contaminants. Here we show that PCBs occur both hadal (7720-8085...
This study investigates carbon stability of biochars produced from wood, herbaceous, and fruit agricultural waste products southern Vietnam. The were by pyrolysis to 500 °C, 700 900 °C at a heating rate 10 °C/min. Organic geochemistry petrology have well-established measurable parameters that define degree preservation organic in the Earth's crust. These are utilized, comparatively, infer relative preserved geological carbonaceous rocks. was assessed measuring incident-light random...
This study investigates the role of climate-driven aquatic productivity increases in conrolling sedimentary accumulation mercury (Hg) Kusawa Lake, Yukon, Canada. Organic geochemistry data reveals a significant link between increasing trends Hg and labile algal-derived organic matter (OM) over centuries particular recent decades. Sedimentary rates continue to increase even though atmospheric concentrations have remained same or declined. Together, these findings indicate that rise content...