遵义牛蹄塘组黑色岩系中多元素富集层的主要矿化特征
Mineralization characteristics of the multi-element-rich strata in the niutitang formation black shale series, Zunyi, Guizhou, China
查看参考文献11篇
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文摘
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在对大量数据进行系统分析的基础上，将贵州遵义下寒武牛蹄塘组黑色岩系中多元素富集层矿化元素按富集系数分为三组。超富集元素：富集系数大于1000，包括Mo、As、Se、Re等；强富集元素：富集系数介于100～1000，包括Ni、U、Au、Ag、Pt、Pd、Tl等；弱富集元素：富集系数近于5～100，包括V、Co、Cu、Pb、Zn、Y、Cd等。结合上述元素的地球化学性质和矿化岩石类型，指出贵州牛蹄塘组多元素富集层综合了岩浆作用、热水沉积和机械沉积作用的特点，是深部岩浆活动强烈喷发期的产物，提出了可能的成矿模式；早期岩浆（火山）活动伴随热水沉积，形成磷块岩（和硅质岩）；中期岩浆活动减弱，表现为剥蚀沉积；晚期火山爆发，除大量射气元素的富集，还带出深部的成矿物质，然后通过水流机械富集成矿。 |
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其他语种文摘
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Based on a large wealth of systematical analysis data and according to the enrichment coefficients, the mineralizing elements in the multi-element-rich strata of the Niutitang Formation black shale series can be classified as three categories; (1)super-enriched elements with enrichment coefficients > 1000, including Mo, As, Se, Re, etc.; (2) strongly enriched elements with enrichment coefficients ranging from 100 to 1000, including Ni, U, Au, Ag, Pt, Pd, Tl, etc.; and (3) weakly enriched elements with enrichment coefficients from 5 to 100, including V, Co, Cu, Pb, Zn, Y, Cd, etc. Furthermore, considering the geochemical characteristics and types of the mineralized rocks of the above elements, the authors think the multi-element-rich strata possess- synthetic characteristics of magmatism, hydrothermal sedimentation and mechanical sedimentation, which are the product of deep-seated magmatic activities. The general metallogenic model can be described as bellows: the early magmatic activities are accompanied with hydrothermal sedimentation and the formation phosphorite (and siliceous rocks), in the middle period, the magmatic activities became weak, as reflected by denudation sedimentation; and in die late period, volcanic explosion led to not only the accumulation of emanation, but also brought about deep-seated metallogenic materials, followed by ore deposition under the action of flowing water through their mechanical enrichment. |
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来源
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矿物学报
,2003,23(4):296-302 【核心库】
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关键词
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黑色岩系
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多元素富集层
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矿化特征
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岩浆活动
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牛蹄塘组
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遵义
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地址
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中国科学院地球化学研究所, 矿床地球化学开放研究实验室, 贵州, 贵阳, 550002
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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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1000-4734 |
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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973计划
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文献收藏号
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CSCD:1241138
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