230Th/238U Activity Ratios in Rhyolite from Izu Arc Volcanoes
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- TAKAHASHI Masaomi
- Department of Applied Chemistry, School of Science and Technology, Meiji University
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- KURIHARA Yuichi
- Department of Applied Chemistry, School of Science and Technology, Meiji University
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- SATO Jun
- Department of Applied Chemistry, School of Science and Technology, Meiji University
Bibliographic Information
- Other Title
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- 伊豆弧の火山から噴出した流紋岩中の<sup>230</sup>Th/<sup>238</sup>U放射能強度比
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Description
Observation was made with rhyolitic volcanic rocks erupted from Kozu-shima, Niijima and Higashi-Izu monogenetic volcano group for activity ratios of 230Th/238U. While the activity ratios of basaltic products from Izu arc showed 230Th/238U<1, the majority of rhyolitic products was in radioactive equilibrium, suggesting that the addition of fluid for rhyolitic magma from subducting slab was less significant than for basaltic magma at the magma genesis. Separate distribution of(230Th/232Th)-(238U/232Th)activity ratios of the rhyolite group from those of the basalt group indicated that the rhyolite of Izu arc might not have genetic relation to the basaltic magma from Izu arc volcanoes.
Journal
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- RADIOISOTOPES
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RADIOISOTOPES 58 (3), 93-100, 2009
Japan Radioisotope Association
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Details 詳細情報について
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- CRID
- 1390282679133866112
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- NII Article ID
- 10024781554
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- NII Book ID
- AN00351589
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- COI
- 1:CAS:528:DC%2BD1MXks1ymtLk%3D
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- ISSN
- 18844111
- 00338303
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- NDL BIB ID
- 10214681
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed