瀬戸内海西部地域における中新世瀬戸内火山岩類のＫ‐Ａｒ年代

• 角井 朝昭

書誌事項

タイトル別名

• K-Ar ages of the Miocene Setouchi-volcanic rocks in the western Setouchi Inland Sea region, Southwest Japan.
• セトナイカイ セイブ チイキ ニ オケル チュウシンセイ セトウチ カザンガンルイ ノ K Ar ネンダイ

抄録

K-Ar ages were determined for the Miocene Setouchi-vocanic rocks in the western Setouchi Inland Sea region, southwestern Japan. The Setouchi-vocanic rocks in this area are olivine andesite, pyroxene hornblende andesite and biotite dacite. The obtained ages of nine andesitic rocks range from 16 Ma to 12 Ma, and most of them concentrate between 15.5 Ma and 14 Ma. Detailed petrographic observation of the specimen suggests that the effect of alteration is negligible in the obtained ages. These ages are about two million years older than the those reported previously. They will be important constraints on discussions regarding the genesis of the Setouchi-vocanic rocks and Miocene tectonics around this area.

収録刊行物

• 地質学雑誌

  地質学雑誌 106 (9), 609-619, 2000

  一般社団法人 日本地質学会

キーワード

• K-Ar dating

詳細情報

• CRID: 1390001206233774336
• NII論文ID: 110003013139
• NII論文ID: 10007644007
• NII書誌ID: AN00141768
• DOI: 10.5575/geosoc.106.609
• COI: 1:CAS:528:DC%2BD3cXnt1Kksrc%3D
• ISSN: 13499963
• ISSN: 00167630
• ISSN: http://id.crossref.org/issn/00167630
• NDL書誌ID: 5497465
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5497465
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可