| 河南省偃龙铝土矿床晚石炭世古地理特征及其对铝土矿的控矿意义 |
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| 引用本文： | 周云荣, 李建全. 河南省偃龙铝土矿床晚石炭世古地理特征及其对铝土矿的控矿意义[J]. 地质与资源, 2019, 28(3): 254-259. |
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| 作者姓名： | 周云荣 李建全 |
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| 作者单位： | 1.江西省勘察设计研究院, 江西 南昌 330000; 2.河南省地质矿产勘查开发局第四地质勘查院, 河南 郑州 450001 |
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| 基金项目： | 中央地勘基金河南省地质勘查基金项目（资）[项目编号：52（预查），8（普查）]. |
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| 摘 要： | 河南省偃龙铝土矿床是近年通过整装勘查新发现的超大型铝土矿床，通过对大量钻孔岩心数据的分析比较，认为区内存在障壁岛沉积相、浅湖-潟湖沉积相、潮坪-沼泽沉积相等3种主要类型沉积环境.铝土矿成矿过程中，在局部的障壁岛沉积相环境无沉积成矿；在浅湖-潟湖沉积相环境下容易沉积成矿，铝土矿的沉积厚度与浅湖-潟湖沉积相下含矿岩系的沉积厚度呈中度相关关系；在潮坪-沼泽沉积相受沉积环境条件的影响，沉积成矿的条件较差.偃龙地区晚石炭世古地理特征决定了含矿岩系的厚度，但不直接控制铝土矿成矿厚度，而是在其他成矿条件耦合作用下，古地理通过控制铝土矿的沉积环境间接控制铝土矿的形成.
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| 关 键 词： | 铝土矿床 沉积古地理 控矿意义 偃龙 河南省 |
| 收稿时间： | 2018-05-10 |
| 修稿时间： | 2018-08-01 |
LATE CARBONIFEROUS PALEOGEOGRAPHY OF THE YANLONG BAUXITE DEPOSIT IN HENAN PROVINCE: Ore-controlling Significance |
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| ZHOU Yun-rong, LI Jian-quan. LATE CARBONIFEROUS PALEOGEOGRAPHY OF THE YANLONG BAUXITE DEPOSIT IN HENAN PROVINCE: Ore-controlling Significance[J]. Geology and Resources, 2019, 28(3): 254-259. |
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| Authors: | ZHOU Yun-rong LI Jian-quan |
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| Affiliation: | 1.Jiangxi Institute of Survey and Design, Nanchang 330000, China; 2.No. 4 Institute of Geological Exploration, Henan Bureau of Geology and Mineral Development, Zhengzhou 450001, China |
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| Abstract: | The Yanlong bauxite deposit is a recently discovered super-large bauxite deposit. By analysis and comparison of a large number of drill core data, it is considered that there existed three main types of sedimentary environment in the area, namely barrier island facies, shallow lake-lagoon facies, and tidal flat-swamp facies. In local barrier island environment, there is no sedimentary mineralization. It is easy to deposit and mineralize in the shallow lake-lagoon environment, in which the thickness of bauxite is moderately correlated with that of ore-bearing rock series. In the tidal flat-swamp environment, the conditions for sedimentary mineralization are poor. The paleogeographic characteristics of Yanlong area in Late Carboniferous determine the thickness of ore-bearing rock series, yet not directly control the mineralization thickness of bauxite. Instead, it indirectly controls the formation by affecting the sedimentary environment combined with other metallogenic conditions. |
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| Keywords: | bauxite deposit sedimentary paleogeography ore-controlling significance Yanlong area Henan Province |
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