A5019882599- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Geological and Geophysical Studies
- Isotope Analysis in Ecology
- Paleontology and Stratigraphy of Fossils
- earthquake and tectonic studies
- Groundwater and Isotope Geochemistry
- Pancreatic and Hepatic Oncology Research
- Geochemistry and Geologic Mapping
- Gallbladder and Bile Duct Disorders
- Geochemistry and Elemental Analysis
- Microbial Community Ecology and Physiology
- Colorectal Cancer Surgical Treatments
- Marine Biology and Ecology Research
- Advanced Computational Techniques and Applications
- Genomics and Phylogenetic Studies
- Mineralogy and Gemology Studies
- Advanced X-ray and CT Imaging
- Pediatric Hepatobiliary Diseases and Treatments
- Petroleum Processing and Analysis
- Geological and Geochemical Analysis
- Case Reports on Hematomas
- Surgical site infection prevention
- COVID-19 and healthcare impacts
University of Toronto
2018-2023
Kobe University
2021-2023
Seattle University
2023
University of Washington
2023
St Joseph's Health Centre
2022
Toronto General Hospital
2022
Chinese University of Hong Kong
2020
University of Hong Kong
2020
Japan Agency for Marine-Earth Science and Technology
2020
International Ocean Discovery Program
2017
Deep, hot, and more alive than we thought Marine sediments represent a massive microbial ecosystem, but still do not fully understand what factors shape limit life underneath the seafloor. Analyzing samples from subduction zone off coast of Japan, Heuer et al. found that life, in particular bacterial vegetative cells, decreases as depth temperature increases down to ∼600 meters below seafloor, corresponding temperatures ∼70°C. Below this limit, endospores are common—a remnant, potential...
Abstract Recent changes in US oceanographic assets are impacting scientists' ability to access seafloor and sub‐seafloor materials thus constraining progress on science critical for societal needs. Here we identify national infrastructure needs address questions. This commentary reports community‐driven discussions that took place during the 3‐day FUTURE of Seafloor Sampling Capabilities 2024 Workshop , which used an “all‐hands‐on‐deck” approach assess sampling requirements a broad range...
X-ray computed tomography (XCT) can be used to identify lithologies and deformation structures within geological core, with the potential for identification processes applied automatically. However, because of drilling disturbance other artefacts, use large XCT-datasets in automated requires methods quality control that systematically. We propose a new systematic method XCT data applies numerical measures CT slices, from this obtains reflective core quality. Because are they quickly...
Abstract Biogeochemical processes in subseafloor sediments are closely coupled to global element cycles. To improve the understanding of changes biogeochemical conditions on geological timescales, we investigate sediment cores from a 1,180 m deep hole Nankai Trough offshore Japan (Site C0023) drilled during International Ocean Discovery Program Expedition 370. During its tectonic migration Shikoku Basin over past 15 Ma, Site C0023 has experienced significant depositional, thermal, and...
Abstract Molybdenum (Mo) is a trace element sensitive to oceanic redox conditions. The fidelity of sedimentary Mo as paleoredox proxy coeval seawater depends on the extent remobilization during postdepositional processes. Here we present content and isotope profiles for deep sediments from Nankai Trough, Japan. signature suggests that these have experienced extensive early diagenesis hydrothermal alteration at depth. Iron (Fe)‐manganese (Mn) (oxyhydr)oxide combined with thiolation leads more...
Drilling during International Ocean Discovery Program (IODP) Expedition 370 at Site C0023 encountered instances of hydrothermal mineralization from 775 to 1121 m below seafloor. Fluid inclusion homogenization temperatures measured on barite veins within this interval indicate precipitation fluids with up 220 °C, and salinities ten times higher than interstitial water (16–25 c.f. 2.8–3.6 wt % NaCl). Patches stratabound (rhodochrosite, calcite, anhydride) are largely confined the vicinity have...
The study investigates the in-situ strength of sediments across a plate boundary décollement using drilling parameters recorded when 1180-m-deep borehole was established during International Ocean Discovery Program (IODP) Expedition 370, Temperature-Limit Deep Biosphere off Muroto (T-Limit). Information shallow portion in/around fault zone is critical for understanding development accretionary prisms and itself. Studies seismic reflection surveys scientific ocean drillings have recently...
Abstract The temperature of maximum pyrolysis yield (known as Tmax) can be used to determine the level thermal alteration in sedimentary organic matter; higher Tmax values represent alteration. is commonly measured on petroleum source rocks or similar sediments with high carbon contents. It would desirable measure volcanic because they have complex patterns However, often low total contents and consequently are susceptible analytical interferences. Despite this, it shown that meaningful...
Abstract One of the commonly used analytical approaches for measuring oxygen isotope ratios δ 18 O solids (organic and inorganic) is to pyrolyze samples gaseous phases then send gas into an ratio mass spectrometer system. Solid measurements are usually stored in silver cups because its low reactivity towards other oxidants. Samples can be dropped directly carbon column pyrolysis furnace. However, tarnish oxidized over a prolonged storage period. We find that while small amount oxides does...
Microbial sulfate reduction in subseafloor sediments regulates a significant portion of the marine organic matter burial flux. Over secular timescales, is fundamental process connecting biogeochemical cycles sulfur, carbon, oxygen and phosphorus. Similar to carbon reduction, associated with strong isotope fractionation that allows us track this through time. It depends on variety factors it has been argued previously systematic differences between shallow deep-sea environments might explain...
Temperature is one of the important parameters to understand complex dynamics, because temperature crust changed by some events such as volcanic activities and a passage high fluid, which affects physical property, chemical cycle also microbiosphere. Therefore, information about allow us dynamics active subduction zone.IODP Site C0023, located at tip zone in Muroto transect Nankai Trough, was drilled IODP Expedition 370. There, we measured vitrinite reflectance an index maximum experienced...