A5051542070- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- earthquake and tectonic studies
- Geological formations and processes
- Isotope Analysis in Ecology
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- Geological and Geochemical Analysis
- Marine and environmental studies
- Seismology and Earthquake Studies
- Geomagnetism and Paleomagnetism Studies
- Geological Studies and Exploration
- Geochemistry and Elemental Analysis
- Geochemistry and Geologic Mapping
- Landslides and related hazards
- Earthquake Detection and Analysis
- Seismic Imaging and Inversion Techniques
- Geological Modeling and Analysis
- Coastal and Marine Dynamics
- Reservoir Engineering and Simulation Methods
- Earthquake and Tsunami Effects
- Pacific and Southeast Asian Studies
- Oceanographic and Atmospheric Processes
- Maritime and Coastal Archaeology
- Marine and coastal ecosystems
Geological Survey of Japan
2016-2025
National Institute of Advanced Industrial Science and Technology
2016-2025
Czech Academy of Sciences, Institute of Geology
2004-2019
Japan Research Institute
2019
Institute of Marine Geology and Geophysics
2014
The University of Tokyo
2014
University of Arizona
2007
GeoInformation (United Kingdom)
2004-2005
University of Minnesota
2001
University of Iowa
2001
A rock-magnetic and paleomagnetic study was conducted on a sediment core of about 4.4 m long taken from the northeastern part Japan Sea. The covers last 30 kyrs, which dated by nineteen radiocarbon (14C) ages. Remanent magnetization is carried dominantly magnetite. Reductive dissolution magnetic minerals occurs between 1.2 1.6 in depth (about 5–8 ka age). rapid downcore decrease anhysteretic remanent (ARM) begins at shallowest depth. Saturation isothermal (SIRM) follows, susceptibility (k)...
Research Article| August 01, 2013 A slump in the trench: Tracking impact of 2011 Tohoku-Oki earthquake M. Strasser; Strasser 1Geological Institute, ETH Zurich, Sonneggstrasse 5, 8092 Switzerland Search for other works by this author on: GSW Google Scholar Kölling; Kölling 2MARUM—Center Marine Environmental Sciences, University Bremen, Leobener Strasse, 28359 Germany C. dos Santos Ferreira; Ferreira H.G. Fink; Fink T. Fujiwara; Fujiwara 3Japan Agency Marine-Earth Science and Technology...
In order to investigate the possibility of a long-term paleoseismic history from offshore sedimentary records in Sumatra, we collected 144 deep-sea sediment cores trench and lower slope piggyback basins Sumatra accretionary prism. We used multibeam bathymetry seismic reflection data develop an understanding catchment basins, turbidity current pathways, depositional styles, as well precisely locate our gravity cores, piston Kasten multicores. use detailed physical property data, including...
The giant 2011 Tohoku-oki earthquake has been inferred to remobilise fine-grained, young surface sediment enriched in organic matter from the slope into >7 km deep Japan Trench. Yet, this hypothesis and assessment of its significance for carbon cycle hindered by limited data density resolution hadal zone. Here we combine new high-resolution bathymetry with sub-bottom profiler images cores taken during 2012-2016 order map first time spatial extent earthquake-triggered event deposit along We...
Integrated Ocean Drilling Program Expedition 346 "Asian Monsoon" obtained sediment successions at seven sites in the Japan Sea (Sites U1422–U1427 and U1430) two closely located northern East China U1428 U1429). The Quaternary sediments of are characterized by centimeter- to decimeter-scale dark–light alternations all deeper than 500 m water depth. sedimentary records from these allow an investigation regional environmental response global climate change, including changes Asian Monsoon...
The Quaternary hemipelagic sediments of the Japan Sea are characterized by centimeter- to decimeter-scale alternation dark and light clay silty clay, which bio-siliceous and/or bio-calcareous a various degree. Each layers considered as deposited synchronously throughout deeper (> 500 m) part sea. However, attempts for correlation age estimation individual limited upper few tens meters. In addition, exact timing depositional onset these its synchronicity sea have not been explored previously,...
Hadal trenches are the deepest places on Earth and important foci for natural carbon sequestration. Much of sedimentary sequences that accumulate within hadal have been linked to widespread slope sediment remobilisation events, triggered by subduction zone earthquakes. Therefore, trench deposits may provide valuable insights into hazards posed large earthquakes their implications cycle. Despite this strong societal relevance, no studies date provided necessary coverage understand spatial...
Little is known about offshore tsunami deposits, although they have the potential to improve palaeotsunami reconstructions, especially in areas with limited preservation of onshore deposits. We analysed 44 sediment cores collected 2012 at water depths 14–30 m Sendai Bay, north-eastern Japan, identify deposits 2011 Tohoku-oki aid 134Cs released from Fukushima-Daiichi Nuclear Plant. The preserved inner shelf are interbedded very fine sand and mud, showing similar features storm In shoreface, a...
On the landward slope of Japan Trench, mid-slope terrace (MST) is located at a depth 4000–6000 m. Two piston cores from MST were analyzed to assess applicability for turbidite paleoseismology and find out reliable recurrence record great earthquakes along Trench. The have preserved records ~ 12 seismo-turbidites (event deposits) during last 4000 years. In upper parts two cores, only following (magnitude M 8 larger) clearly recorded: 2011 Tohoku, 1896 Sanriku, 1454 Kyotoku, 869 Jogan...
The delivery of organic carbon (OC) to the ocean's deepest trenches in hadal zone is poorly understood, but may be important for cycle, contain crucial information on sediment provenance and event-related transport processes, provide age constraints stratigraphic sequences this terminal sink. In study, we systematically characterize bulk matter (OM) OC signatures (TOC/TN, δ13C, 14C), as well those from application serial thermal oxidation (ramped pyrolysis/oxidation) cores recovered along an...
X-ray computerized tomography (CT) analysis was used to image a half-round core sample of 50 cm long recovered from near Challenger Mound in the Porcupine Seabight, off western Ireland during Integrated Ocean Drilling Program Expedition 307. This allowed three-dimensional examination complex shapes pebbles and ice-rafted debris sedimentary sequences. CT also for determination physical properties; comparison between bulk density by mass-volume method estimated based on linear attenuation...
Establishment of sedimentary sequence is essential for the interpretation records. Integrated Ocean Drilling Program (IODP) Expedition (Exp.) 346 drilled high-quality sediment archives with more than three holes each at nine sites that enable us to establish continuous sequences through splicing technique. After extensive efforts replace disturbed, missed, or duplicated intervals found in spliced constructed onboard during IODP Exp. corresponding undisturbed intervals, nearly perfectly...