Rb-Sr whole-rock and biotite isochron ages of the Soeda Granodiorite, eastren North Kyushu
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- YUHARA Masaki
- Department of Earth System Science, Faculty of Science, Fukuoka University
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- KAMEI Atsushi
- Department of Geoscience, Faculty of Science and Engineering, Shimane University
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- OKANO Osamu
- Department of Earth Sciences, Faculty of Science, Okayama University
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- KAWANO Yoshinobu
- Department of Environment Systems, Faculty of Geo-environmental Science, Rissho University
Bibliographic Information
- Other Title
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- 北部九州東部に分布する添田花崗閃緑岩の Rb-Sr 全岩-黒雲母アイソクロン年代
- ホクブ キュウシュウ トウブ ニ ブンプ スル ソエダ ハナオカセンリョクガン ノ Rb-Sr ゼン ガン-クロウンモ アイソクロン ネンダイ
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Abstract
Rb-Sr geochronological analyses were carried out for the Soeda Granodiorite, eastren North Kyushu, Southwest Japan. We obtained two Rb-Sr isochron ages from the granodiorite samples, such as 98.1±0.8 Ma defined by felsic fraction, whole-rock, and biotite, and 97.0±0.9 Ma defined by plagioclase, K-feldspar, whole-rock, and biotite. They are cooling ages for intrusion, that is, the ages represent the time at which the rocks cooled trough about 300°C. They are in range of K-Ar biotite ages from Cretaceous granitic rocks in eastren North Kyushu. Thus, the Soeda Granodiorite cooled down about 300°C at this time.<br>
Journal
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- Japanese Magazine of Mineralogical and Petrological Sciences
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Japanese Magazine of Mineralogical and Petrological Sciences 42 (4), 185-189, 2013
Japan Association of Mineralogical Sciences
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Details 詳細情報について
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- CRID
- 1390282681502004352
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- NII Article ID
- 10031191338
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- NII Book ID
- AA1146088X
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- ISSN
- 13497979
- 1345630X
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- NDL BIB ID
- 024897169
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed