西南日本の中国地方東部・近畿地方西部の上部古生層中に胚胎する層状硫化鉄鉱鉱床―とくに柵原鉱床との関連について
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- 光野 千春
- Department of Earth Sciences, Faculty of Science, Okayama University
書誌事項
- タイトル別名
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- Stratiform Sulfide Ore Deposits of the Upper Palaeozoic in Eastern Chugoku and Western Kinki Regions, Southwestern Japan
- Studies on the Geology and Ore Deposits of the Yanahara Mining District-part 2
- 柵原鉱床地域の地質および鉱床の研究(その2)
説明
In eastern Chugoku and western Kinki regions there are a number of stratiform sulfide ore deposits in Carboniferous and Permian submarine volcanic rocks and their metamorphic equivalents. They can be classified into three groups: (1) ore deposits in Carboniferous basic schist of the lower formation of the Maniwa Group of the Sangun metamorphic zone (Besshi-type stratiform sulfide ore deposits); (2) ore deposits in Permian basic schist and basic volcanic rocks of the lower formation of the Maizuru Group (Besshi-type stratiform sulfide ore deposits); (3) ore deposits in Permian acidic volcanic rocks of the middle formation of the Maizuru Group (Yanahara-type stratiform sulfide ore deposits). All ore deposits were folded three times: Late Paleozoic to Early Triassic (Sangun metamorphism), Middle Triassic and Jurassic ages. The Yanahara and Fukuzawa ore deposits were also influenced by contact metamorphism caused by Cretaceous granitic rocks. These ore deposits show a remarkable uniformity in sulfur isotope ratio, ranging from +0.6 to +2.99‰, despite the differences in age and acidity among the host volcanic rocks.<BR>Both the Besshi-and Yanahara-type ore deposits are volcanic exhalative in origin. The Besshi-type ore deposits are genetically related to basic submarine volcanism, whereas the Yanahara-type ore deposits are related to acidic submarine volcanism.
収録刊行物
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- 鉱山地質
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鉱山地質 38 (209), 247-262, 1988
資源地質学会
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詳細情報 詳細情報について
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- CRID
- 1390282681505119232
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- NII論文ID
- 130003639759
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- ISSN
- 00265209
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- データソース種別
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- JaLC
- CiNii Articles
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- 使用不可