熊野灘のアカホヤ火山灰
Bibliographic Information
- Other Title
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- クマノ ナダ ノ アカホヤ カザンバイ
- Identification of Akahoya volcanic ash, an age diagnostic tephra, and Holocene sedimentation rate in the Kumanonada off the southeastern coast of Kii peninsula, Japan
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Abstract
White volcanic ash layes, with thickness of 2cm to 1Ocm, were found in the short cores from the deep-sea floor of Kumanonada at depths of 1,650m to 2,083m. Their depth in the cores varies from 54cm to 167cm from each core-top. Their chemical composition (Na, Mg, Al, Si, K, Ca. Ti, Fe), determined by energy dispersive X-ray spetctrometry (EDX), is all identical. Statistically the tephra is correlated to Akahoya volcanic ash, which was ejected 6,300 years ago from the Kikai caldera situating in the southern off-coast of Satsuma Peninsula, South Kyushu. The mean sedimentation rate for the last 6,300 years in this basin is calculated to be 26 to 8.6cm/Kyr (17cm/Kyr in average).
Journal
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- 奈良教育大学紀要. 自然科学
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奈良教育大学紀要. 自然科学 36 (2), 29-38, 1987-11-25
奈良教育大学
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Details 詳細情報について
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- CRID
- 1050001339050243328
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- NII Article ID
- 120001821918
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- NII Book ID
- AN00181070
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- ISSN
- 05472407
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- NDL BIB ID
- 3152463
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- Text Lang
- ja
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- Article Type
- departmental bulletin paper
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- Data Source
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- IRDB
- NDL
- CiNii Articles
