書誌事項
- タイトル別名
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- K-Ar ages of an andesitic parallel dike swarm in the Takane area, Takayama City, Gifu Prefecture, Central Japan
- ギフケン タカヤマシ タカネ チイキ ニ ブンプ スル アンザンガンシツ ヘイコウ ガンミャクグン ノ K-Ar ネンダイ
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説明
<p>Numerous paleomagnetic and chronological studies have contributed to the elucidation of the early Miocene (18-16 Ma) clockwise rotation of Southwest Japan associated with the major opening of back-arc basins in the Japan Sea. Paleomagnetic data have been reported previously from an andesitic parallel dike swarm in the Takane area, Takayama City, Gifu Prefecture, Central Japan, showing easterly deflection of the observed magnetization direction, in contrast to the expected paleomagnetic direction for the early Miocene. This must therefore represent clockwise rotation during the opening of the Japan Sea, providing the dike swarm was emplaced prior to its opening. Here we report new K-Ar hornblende ages from an andesite dike from the swarm. Two K-Ar ages of 22.1±1.2 and 21.2±1.2 Ma are statistically indistinguishable, and clearly pre-date the clockwise rotation.</p>
収録刊行物
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- 地質学雑誌
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地質学雑誌 126 (9), 543-548, 2020-09-15
一般社団法人 日本地質学会
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詳細情報 詳細情報について
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- CRID
- 1391694356243252608
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- NII論文ID
- 130007955827
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- NII書誌ID
- AN00141768
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- ISSN
- 13499963
- 00167630
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- NDL書誌ID
- 030702733
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可