チリーにおける磁鉄鉱系とチタン鉱鉱系花崗岩類
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- 石原 舜三
- Geological Survey of Japan
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- ULRIKSEN Carlos E.
- Instituto de Investigaciones Geologicas
書誌事項
- タイトル別名
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- The magnetite-series and ilmenite-series granitoids in Chile.
説明
Paleozoic and Mesozoic-Cenozoic granitoids of the Chilean Andes were studied magnetically in the area between Latitude 22-35°S. The Paleozoic granitoids are found to be composed of the ilmenite-series and weakly magnetic magnetite-series, whereas all the Mesozoic-Cenozoic ones appear to be the magnetite-series. Lack of significant sulfide deposits in the Paleozoic terrains may have been resulted from the reducing nature of the granitic magmatism.<BR>Within the magnetite-series terrains of Mesozoic-Cenozoic age, magnetic susceptibility of the granitoids seems to increase continentward. Granitoids related to porphyry copper deposits in the Andean Cordillera have higher magnetic susceptibility than those occurring in the Coast Range which could be genetically associated with manto-type deposits. The different styles of mineralization may possibly be in consequence of the different oxidation status of the granitic magmatism.
収録刊行物
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- 鉱山地質
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鉱山地質 30 (161), 183-190, 1980
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
- 1390001206525457920
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- NII論文ID
- 130003639545
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- ISSN
- 00265209
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
