A5005135306- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- Geological and Geochemical Analysis
- Seismology and Earthquake Studies
- Geological formations and processes
- Geomagnetism and Paleomagnetism Studies
- Earthquake and Tsunami Effects
- Microbial Community Ecology and Physiology
- Paleontology and Stratigraphy of Fossils
- Seismic Waves and Analysis
- GaN-based semiconductor devices and materials
- Hydraulic Fracturing and Reservoir Analysis
- Metabolomics and Mass Spectrometry Studies
- Oceanographic and Atmospheric Processes
- Astrophysics and Star Formation Studies
- Geophysics and Gravity Measurements
- Astronomy and Astrophysical Research
- Earthquake and Disaster Impact Studies
- Geological Modeling and Analysis
- Magnetic and Electromagnetic Effects
- Spectroscopy and Laser Applications
Japan Agency for Marine-Earth Science and Technology
2020-2025
The University of Tokyo
2014-2024
Expedition Technology (United States)
2024
Northern Arizona University
2023
McGill University
2023
Cornell University
2023
Université de Lorraine
2023
Frontier Science Foundation
2019
Sphere Institute
2015-2017
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...
IODP Expedition 405 “Tracking Tsunamigenic Slip Across the Japan Trench” (JTRACK) was a challenging but successful 4-month expedition (September 6 to December 24, 2024 – 56 scientists) that revisited and drilled large co-seismic slip region of 2011 Mw 9.0 Tohoku-oki earthquake, 12 years after 343 “JFAST” had done so. One expedition’s primary objectives is evaluate temporal variations in stress state, fluid flow, physical properties...
The International Ocean Discovery Program (IODP) Expedition 386, Japan Trench Paleoseismology, represents the first utilization of giant piston coring (GPC) within scientific ocean research drilling. This allowed for a Mission Specific Platform (MSP) multi-site, multi-hole, shallow subsurface in an ultra-deep water subduction zone trench. primary objective expedition was to investigate concept submarine paleoseismology Trench, which involves studying long-term records deposits deep sea that...
Abstract Construction of regional geomagnetic secular variation curves for the last several tens thousands years is important understanding behavior non-dipole fields and applications to geochronology. Around Japan, records older than 10 ka was scarce, in particular relative paleointensity (RPI). Here, we conducted a paleomagnetic study sediment core covering ~ 40 kyr taken from small basin Nankai Trough. The consists homogenous hemipelagic sediments except turbidites volcanic ashes. age...
Abstract Submarine landslides triggered by earthquakes can generate turbidity currents. Recently, several studies have reported that the remobilization of surface sediment also Such sedimentary processes may be influenced characteristics, seafloor morphology and seismic motions. Here, we verify using records from Nankai forearc region, SW Japan. We collected multi-core piston core samples a small confined basin, mainly composed silty clay or very fine sand. Radiocaesium measurements show...
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...