节点文献
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
LATE CARBONIFEROUS PALEOGEOGRAPHY OF THE YANLONG BAUXITE DEPOSIT IN HENAN PROVINCE:Ore-controlling Significance
【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.
【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.
【Key words】 bauxite deposit; sedimentary paleogeography; ore-controlling significance; Yanlong area; Henan Province;
- 【文献出处】 地质与资源 ,Geology and Resources , 编辑部邮箱 ,2019年03期
- 【分类号】P618.45
- 【被引频次】2
- 【下载频次】56