書誌事項
- タイトル別名
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- Reconfirmation of jadeite in the Sanbagawa belt of the Shibukawa region, central Japan: Occurrence within a veinlet cutting dunite
- チュウブ チホウ シブカワ チイキ サンバガワタイ ニ オケル ヒスイ キセキ ノ サイカクニン : ダナイト チュウ ノ サイミャク コウセイ コウブツ ト シテ ノ サンシュツ
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<p>The Shibukawa region of the Sanbagawa belt, central Japan, is one of the historic jadeite localities in Japan. Although its petrological and mineralogical characteristics of the locality were briefly reported over 35 years ago, no further studies have been conducted since the disappearance of the jadeite-bearing outcrop. Recently, jadeite was discovered within a veinlet in a host dunite boulder, a member of an ultrabasic body that is surrounded by the Sanbagawa crystalline schists in the Shibukawa region. The veinlet is composed mainly of diopside, OH-bearing grossular, jadeite, chlorite, pargasite and serpentine. Relict olivine and spinel, which were probably members of the host dunite, rarely occur in the veinlet. The jadeite grains vary from <1 to 50 µm in size, and occur as patchy aggregates with amoeba-shaped grossular grains. The jadeite grains have Na2O and Al2O3 contents of 14.7-15.4 wt.% and 24.3-25.5 wt.%, respectively, and are 91-98% jadeite contents [(Na-Fe3+)×100].</p>
収録刊行物
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- 地質学雑誌
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地質学雑誌 127 (1), 59-65, 2021-01-15
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
- 1390287706351310464
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- NII論文ID
- 130008025394
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- NII書誌ID
- AN00141768
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- ISSN
- 13499963
- 00167630
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- NDL書誌ID
- 031303796
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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
