書誌事項
- タイトル別名
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- Discovery of Ni-rich spinels in Upper Triassic chert of the Mino Terrane, central Japan
- チュウブ ニホン ミノタイ ノ ジョウブ トリアスケイ チャート カラ ハッケン シタ Ni ニ トム スピネル リュウシ
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説明
The magnetic fraction of a lower Norian claystone layer (ca. 5 cm thick) in a radiolarian chert succession within the Mino Terrane, Inuyama area, Central Japan, contains a large number of small euhedral to subhedral crystals of oxidized Ni-rich spinels. The stratigraphic position of this concentration of Ni-rich spinels is clearly indicated by a sharp increase in magnetic susceptibility at the claystone layer. These spinels are distinguished from typical igneous spinels by their high Ni and Fe3+ contents, and show large variations in composition. The textures and chemical compositions of the spinel crystals are similar to those of Ni-rich spinels at the Cretaceous-Paleogene boundary. The discovery of Ni-rich spinels in a lower Norian claystone suggests an important sedimentary record of an extraterrestrial impact in the Late Triassic.
収録刊行物
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- 地質学雑誌
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地質学雑誌 116 (10), 575-578, 2010
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
- 1390001206238496896
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- NII論文ID
- 130000413150
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- NII書誌ID
- AN00141768
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- ISSN
- 13499963
- 00167630
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- NDL書誌ID
- 10894232
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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