Submarine Mass Movements and Their Consequences
5th International Symposium
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13 Result(s)
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Ken Ikehara
Oceanography
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Article
Open AccessActive sediment transport along trench axis: insights from X-ray fluorescence core scanning and magnetic analysis of marine sediments in the southwestern Ryukyu Trench
The southwestern Ryukyu Trench is an ideal place for investigating sediment transport from the Taiwan mountain belt to the Ryukyu Trench floor. To study the characteristics of trench turbidites and sediment tr...
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Article
Open AccessSupercycle in great earthquake recurrence along the Japan Trench over the last 4000 years
On the landward slope of the Japan Trench, the mid-slope terrace (MST) is located at a depth of 4000–6000 m. Two piston cores from the MST were analyzed to assess the applicability of the MST for turbidite pal...
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Article
Determining sources of deep-sea mud by organic matter signatures in the Sunda trench and Aceh basin off Sumatra
The content, optically determined properties, and stable isotope composition of organic carbon in fine-grained sediment cores were analyzed to investigate the origins of deep-sea sediments deposited in the Ace...
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Article
Morpho-sedimentary features and sediment dispersal systems of the southwest end of the Ryukyu Trench: a source-to-sink approach
The southwestern Ryukyu Trench near Taiwan is an ideal place for source-to-sink studies because of the short sediment transport route between the terrestrial sediment source in Taiwan and the marine sink in th...
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Article
Deep-sea meiofauna off the Pacific coast of Tohoku and other trench slopes around Japan: a comparative study before and after the 2011 off the Pacific coast of Tohoku Earthquake
We compared meiofaunal assemblages obtained from the landward slope of the Japan Trench off the Sanriku region of Honshu Island before the 2011 off the Pacific coast of Tohoku Earthquake, 4.5 months and 1.5 ye...
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Chapter
Deep-Sea Turbidite Evidence on the Recurrence of Large Earthquakes Off Shakotan Peninsula, Northeastern Japan Sea
Twelve deep-sea turbidites were identified in the Holocene sequence of a core collected from the western foot of the Kaiyo Seamount, located near the fault area of the 1940 Shakotan-oki earthquake, northern Ok...
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Chapter
Evidence for Mass Transport Deposits at the IODP JFAST-Site in the Japan Trench
Several studies indicate that the 2011 Tohoku-Oki earthquake (Mw 9.0) off the Pacific coast of Japan has induced slip to the trench and triggered landslides in the Japan Trench. In order to better understand thes...
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Book and Conference Proceedings
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Chapter and Conference Paper
Settling of Earthquake-Induced Turbidity on the Accretionary Prism Slope of the Central Nankai Subduction Zone
Studied of turbidite deposits can provide valuable paleoseismological information, such as earthquake recurrence intervals. However, there are few studies based on in situ observations of gravity flows during ...
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Chapter and Conference Paper
Submarine Slope Response to Earthquake Shaking Within Western Sagami Bay, Central Japan
Earthquakes are a major trigger of submarine landslides. Strong ground shaking of the sea floor by an earthquake increases the sediment pore pressure and induces slope failure. As submarine landslides may gene...
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Chapter and Conference Paper
Submarine Mass Movements and Their Consequences
Submarine mass movements represent major offshore geohazards due to their destructive and tsunami-generation potential. This potential poses a threat to human life as well as to coastal, near shore and offshor...
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Article
Biomarker records from core GH02-1030 off Tokachi in the northwestern Pacific over the last 23,000 years: Environmental changes during the last deglaciation
We investigated marine and terrestrial environmental changes at the northern Japan margin in the northwestern Pacific during the last 23,000 years by analyzing biomarkers (alkenones, long-chain n-alkanes, long-ch...
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Article
Late Quaternary Seasonal Sea-Ice History of the Northeastern Japan Sea
The Late Quaternary sea-ice history of the northeastern Japan Sea is discussed on the basis of the occurrence of dropstones and ice-rafted debris (IRD) in fine sediment cores. IRD was found in all strata excep...
