| 中国东部古生界沉积-改造型铁矿床地质及成生机制 |
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| 引用本文： | 冯志文
,夏卫华.中国东部古生界沉积-改造型铁矿床地质及成生机制[J].地球科学,1988(6). |
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| 作者姓名： | 冯志文 夏卫华 |
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| 作者单位： | China University of Geosciences，Wuhan 430074 |
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| 摘 要： | 中国东部古生界沉积—改造型铁矿床含矿岩系基本上由细碎屑—碳酸盐岩组成,而且常与富铁白云岩共生。矿体产状多与围岩一致,呈沉积整合接触。矿床中普遍发育有后生“再造”型矿体,呈脉状叠加在层状矿体之上,有明显的穿层现象。 海解作用是沉积成矿的重要因素,再造成矿作用是在沉积富铁碳酸盐建造的基础上发生富铁碳酸盐矿物的重溶,铁质被搬运、迁移,最后在碱性或偏碱性围岩中重新沉淀出来。
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| 关 键 词： | 沉积-改造型铁矿床 热卤水 成生机制 古生界 中国东部 |
GEOLOGY AND FORMATION MECHANISM OF IRON DEPOISTS OF SEDIMENTARY-REGENERATED TYPE IN PALEOZOIC OF EASTERE CHINA |
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| Feng Zhiwen Xia Weihua.GEOLOGY AND FORMATION MECHANISM OF IRON DEPOISTS OF SEDIMENTARY-REGENERATED TYPE IN PALEOZOIC OF EASTERE CHINA[J].Earth Science-Journal of China University of Geosciences,1988(6). |
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| Authors: | Feng Zhiwen Xia Weihua |
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| Abstract: | Ore-bearing rock formation mainly consists of fine clastic-carbonate rocks which are often associated with iron-rich dolomite. Ore bodies are in concordance with bedding of wall rocks. In deposits epigenetic "regenerated"ore bodies Well developed, which are diplogeneted on stratiform ore bodies and clearly cut through them. Dissolution of materials in the ocean bottom is the chief factor of sedimentary metallization. On the base of sedimentary iron-rich carbonate formation the iron-rich carbonate minerals were redissolved, and iron ions were transported, migrated and reprecipitated in subalkaline or alkaline wall rock,finally formed reconstructed iron deposit. |
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| Keywords: | iron deposits of sedimentary-regenerated type hot underground brine formation mechanism Paleozoic Eastern China |
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