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| 山西本溪组铝土矿成矿条件及成矿规律探讨 | |
| 引用本文： | 王银川,李昭坤,翟自峰,李瑞保,李欣.山西本溪组铝土矿成矿条件及成矿规律探讨[J].西北地质,2011,44(4):82-88. |
| 作者姓名： | 王银川 李昭坤 翟自峰 李瑞保 李欣 |
| 作者单位： | 1. 长安大学地球科学与资源学院,陕西西安,710054 2. 山西省地球物理化学勘查院,山西运城,044004 3. 中国地质大学地球科学与资源学院,北京,100083 |
| 基金项目： | 国家自然科学基金项目(41172186,40972136,40572121); 中央高校基本科研业务费专项资金项目(CHD2009JC046) |
| 摘 要： | 通过对山西石炭系本溪组铝土矿,即华北G层铝土矿形成的构造背景、古地理环境及铝土矿床的分布分析,指出了山西铝土矿矿床主要分布在各古陆、古岛边缘的成矿盆地中,且成矿盆地的封闭性越好越有利于成矿.古陆上广泛出露的铝硅酸盐岩经过风化分解,其中的K、Na、Ca、Mg等元素大多数被淋失,Fe、Al、Ti、Si等元素相对富集,残留在红土风化壳中,经海侵短距离机械搬运至沉积盆地沉积.通过对铝土矿成分及其围岩物质组分的分析,进一步确认沉积在古陆边缘的原始铝土矿层埋藏于潜水面以下的还原环境中,经地下水、地表水等酸性溶液的淋滤脱硅后沉积成矿,后经地壳抬升,通过对原始铝土矿的渗流作用、氧化改造而达到铝土矿的富集,且铝土矿多分布在靠近古陆边缘的缓坡一侧,在沟谷两侧的高山低洼处矿体较富,而埋藏越深越则不利于成矿. |
| 关 键 词： | 铝土矿 铝硅酸盐岩 钙红土 沉积盆地 古陆 |
Benxi Formation Bauxite Mineralization Condition and Rule in Shanxi Province |
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| WANG Yin-chuan , LI Zhao-kun , ZHAI Zi-feng , LI Rui-bao , LI Xin.Benxi Formation Bauxite Mineralization Condition and Rule in Shanxi Province[J].Northwestern Geology,2011,44(4):82-88. | |
| Authors: | WANG Yin-chuan LI Zhao-kun ZHAI Zi-feng LI Rui-bao LI Xin |
| Institution: | WANG Yin-chuan1,LI Zhao-kun1,ZHAI Zi-feng2,LI Rui-bao1,LI Xin3(1.School of Earth Sciences and Resources Management,Chang'an University,Xi'an 710054,China,2.Physical Chemistry of The Earth Exploration in Shaanxi Province,Yuncheng 044004,3.School of the Earth Sciences and Land Resources,China University of Geosciences,Beijing 100083,China) |
| Abstract: | Carboniferous Benxi bauxite in Shanxi Province is also called the North G layer of bauxite.Through the analysis of its tectonic background and ancient geography and the distribution of bauxite,we point out that the Shanxi bauxite deposits are mainly distributed in the ancient land,ancient island edge mineralization basin,and the better the mineralization basin closeness the more advantageous for the mineralization.Ancient land wide outcropping of aluminum silicate rocks by weathering and decomposition,the e... |
| Keywords: | bauxite aluminum silicate rock calcium red clay sedimentary basin ancient land |
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