K-Ar dating of volcanic rocks along the Aira caldera rim: part 2-volcanic history of western and northwestern area of caldera and Sakurajima volcano-
Bibliographic Information
- Other Title
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- 姶良カルデラ周縁部に分布する火山岩のK-Ar年代測定(続報)-カルデラ西縁,北西縁部,及び桜島火山の活動史-
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Abstract
Volcanic history of Aira caldera was discussed by K-Ar dating of volcanic rocks from western Yoshino-dai area, Aoshiki basalt at northwestern Kamo area and those from Sakurajima volcano. The result implies that the caldera wall at Yoshino-dai area formed at least after 0.35 Ma. The K-Ar age of 0.08 Ma from Aoshiki basalt also implies that the activity of basaltic magmas occurred a few ten thousand years before the Aira pyroclastic eruption. The reanalysis of lava flow from the bottom in the Harutayama onservation well of Sakurajima volcano shows its eruptive age within a ten thousand years, which agrees with the previous result.
Journal
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- Disaster Prevention Research Institute Annuals. B
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Disaster Prevention Research Institute Annuals. B 44 (B-1), 305-316, 2001-04-01
京都大学防災研究所
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Details
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- CRID
- 1050001335593015808
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- NII Book ID
- AN00027784
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- ISSN
- 0386412X
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- HANDLE
- 2433/80514
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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