K-Ar ages of the Oshidomari lava from the Rishiri Volcano, off northern Hokkaido, Japan: Insight into the incipient stage of volcanic activity

Two K-Ar ages (0.30±0.19 Ma and 0.39±0.17 Ma) were obtained from the Oshidomari lava from the Rishiri Volcano, off north Hokkaido, Japan. The age data indicate the lava was erupted in the Middle Pleistocene. We newly propose an incipient stage of volcanic activity followed by the initial stage.

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Bibliographic Details
Published inThe Journal of the Geological Society of Japan Vol. 117; no. 11; pp. 648 - 650
Main Authors Ueki, Takeyuki, Kondo, Reisuke
Format Journal Article
LanguageEnglish
Japanese
Published The Geological Society of Japan 15.11.2011
Subjects
eruptive history
Hokkaido
K-Ar dating
lava
Pleistocene
Rishiri volcano
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Summary:Two K-Ar ages (0.30±0.19 Ma and 0.39±0.17 Ma) were obtained from the Oshidomari lava from the Rishiri Volcano, off north Hokkaido, Japan. The age data indicate the lava was erupted in the Middle Pleistocene. We newly propose an incipient stage of volcanic activity followed by the initial stage.
ISSN:0016-7630
1349-9963
DOI:10.5575/geosoc.2011.0018