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文摘
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自1927年丁道衡教授发现白云鄂博铁矿迄今已近90年。该矿床不仅仅是铁矿,而成为铌-稀土多金属矿床,其中稀土储量已成为世界最大的稀土矿床。国内外许多地质专家进行了多次考察和研究。曾有人预测矿区应有火山岩存在。直到1982年笔者才在西矿发现了火山岩。这些火山岩赋存于铁矿体附近的板岩中。它们是中酸性火山岩系列。包括英安质角砾凝灰熔岩、英安质熔结角砾岩和英安岩。这些火山岩具斑状构造,基质为隐晶质凝灰构造。英安岩基质为微晶结构。长石和石英斑晶微裂隙密布,石英有很好熔蚀的港湾结构,长石发育次生边,还见到火山玻璃及其碎屑。 |
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其他语种文摘
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It has been 90 years since Prof.Ding Daoheng found the Bayan Obo iron ore in 1927.Follow-up research and production show that the deposit is not just an iron ore,but world’s largest rare earth and niobium deposit.Many geological experts both home and abroad have conducted numerous investigation and research.And volcanic rocks had been predicted to occur in this area.It was not until 1982 that the authors found volcanic rocks in the west mine of this area,which occur mainly in the slate surrounding iron orebodies.They are mainly composed of intermediate or acidic volcanic rock series,including dacitic breccia tuff,dacitic fused breccia,and dacite.The volcanic rocks are characterized by porphyry structure and aphanitic tuff texture.The dacite is microcrystalline structure,while feldspar and quartz phenocrysts are of well-developed microcracks.The quartz shows a harbor structure with good ablation.Secondary sides,volcanic glass and its debris also occur in the feldspar. |
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来源
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地质学报
,2012,86(5):753-756 【核心库】
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关键词
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白云鄂博西矿
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火山岩
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岩石学特征
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地址
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1.
中国科学院地球化学研究所, 矿床地球化学国家重点实验室, 贵阳, 550002
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内蒙古包头包钢集团巴润矿业有限责任公司, 内蒙古, 包头, 014080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0001-5717 |
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学科
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地质学 |
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基金
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国家自然科学基金项目
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中国科学院贵阳地球化学研究所矿床地球化学中国科学院重点实验室基金
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文献收藏号
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CSCD:4539013
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