A5075978645- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- High-pressure geophysics and materials
- Geochemistry and Geologic Mapping
- Hydrocarbon exploration and reservoir analysis
- Paleontology and Stratigraphy of Fossils
- Indigenous Studies and Ecology
- Crystal Structures and Properties
- Methane Hydrates and Related Phenomena
- Marine and fisheries research
- Climate change and permafrost
- Marine animal studies overview
- Underwater Acoustics Research
University of British Columbia
2019-2023
Natural Resources Canada
2013-2016
Carleton University
2016
University of Ottawa
2015
NOAA National Marine Fisheries Service Alaska Fisheries Science Center
1996
Abstract Hawaiian volcanoes belong to two geographically and geochemically distinct trends, the Loa Kea trends. The cause of this dichotomy is still strongly debated. One prevailing hypotheses that trends originate in deep mantle where plume straddles geophysically domains at core‐mantle boundary (CMB). New high‐precision multi‐isotopic (Pb, Hf, Nd, Sr) compositions lavas from three key volcanoes, Lō‘ihi, Kohala, Haleakalā, show transitional signatures between call into question degree...
Abstract For ~82 million years, the Hawaiian‐Emperor chain volcanoes have sampled Pacific mantle via Hawaiian plume, providing evidence that its composition varies on a range of temporal and spatial scales. from 2 to 0 Ma are divided into southwestern (Loa) northeastern (Kea) geographic geochemical trends interpreted reflect bilateral chemical structure underlying plume corresponding deep sources. formed between 8 3 record transition Kea‐dominated Northwest Ridge (49 Ma) younger Islands....
The transitive theory in geostatistics provides an approach for the estimation of variance and characterization spatial structure fisheries acoustic surveys. For equally spaced, parallel transect surveys, data collected along a can be summed represented by single value, thus reducing problem to one dimension. This methodology is applied surveys walleye pollock Alaska. Results show similarity within areas between years, diVerences areas. Estimation errors are computed each survey, compared...
Abstract Hawaiian volcanoes record 6 Ma of potentially deep mantle chemistry and form two parallel volcanic chains that are geochemically unique, named Loa Kea. erupt lavas with isotopically enriched compositions thought to reflect the presence recycled material in source plume. Variations stable thallium (Tl) isotopes have been used trace pelagic ocean sediment from subduction eruption arc intraplate lavas. Previous work attributed heavy Tl isotopic eight samples sediments their source. We...
Abstract Kauaʻi shield‐stage lavas are central to understanding the origin of distinct Kea and Loa Hawaiian geochemical trends in basalts. These reflect two geochemically sides plume, with southwest northeast. The geochemistry Sr‐Nd‐Hf isotopic compositions from show a transition across island mantle source becoming dominant as volcano grew. This is gradual west east supports hypothesis that sampled both bilateral phenomenon unusual for volcano. Notably, marks arrival progressively larger...