K-Ar ages of the Miocene granites in the Takatsuki-yama and the surrounding areas, southwestern Shikoku.
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- SUMII Tomoaki
- Geochemistry Department, Geological Survey of Japan
Bibliographic Information
- Other Title
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- 四国南西部高月山とその周辺の中新世花こう岩類のK‐Ar年代
- 四国南西部高月山とその周辺の中新世花崗岩類のK-Ar年代
- シコク ナンセイブ タカツキヤマ ト ソノ シュウヘン ノ チュウシンセイ カコウガンルイ ノ K Ar ネンダイ
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Description
Three biotite K-Ar ages were determined for the Miocene Takatsuki-yama and Miuchi plutons, southwestern Shikoku, Japan. These plutons belong to the Outer Zone Acidic Rocks in the Southwest Japan (OZARSWJ). The obtained ages from the two granodioritic samples in the Takatsuki-yama pluton give a good coincidence; 13.9±0.2 Ma and 14.0±0.2 Ma. The granite sample of the Miuchi pluton gives slightly younger age (13.4±0.2 Ma) than those of the Takatsuki-yama pluton. Though these two plutons were considered as the different exposures of a single batholith, the different ages suggest that these two exposures might belong to the different intrusive blocks with short interval. The obtained ages for the both pultons are within the range of 13-15 Ma, which corresponds to the time interval of the other OZARSWJ granitic rocks.
Journal
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- Japanese Magazine of Mineralogical and Petrological Sciences
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Japanese Magazine of Mineralogical and Petrological Sciences 29 (3), 67-73, 2000
Japan Association of Mineralogical Sciences
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Details 詳細情報について
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- CRID
- 1390001206524755456
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- NII Article ID
- 10004585527
- 30039841336
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- NII Book ID
- AA1146088X
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- COI
- 1:CAS:528:DC%2BD3cXnsFGntr8%3D
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- ISSN
- 13497979
- 1345630X
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- NDL BIB ID
- 5617739
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed