河南省荥巩煤田下部铝土矿床及其含矿岩系锂元素分布规律研究

Study on the Distribution of Lithium in the Bauxite Orebody and Bauxite-Bearing Rocks Underneath the Coal Bed of the Xinggong Coalfield, Henan Province

本文研究了河南省荥巩煤田下部铝土矿床铝土矿层及其含矿岩系锂元素(Li)的分布特征及其与主量元素的相关性,以期为铝土矿矿床伴生锂资源的综合利用与评价提供参考依据。研究表明,铝土岩的Li平均含量高于铝土矿和黏土岩,在空间上Li的分布差异较大。纵向上,中、上部颜色较深的铝土岩、铝土矿的Li含量高,往下岩(矿)石颜色变浅、Li含量降低。在矿体走向上,矿区中部岩(矿)石的Li含量最高,平均厚度最大,东部次之,西部最低;在矿体倾向上,深部和浅部铝土矿的Li含量相对高。矿区铝土矿、铝土岩的Li含量随Al2O3含量的升高而降低;Li与SiO2呈中等正相关关系;Li与TiO2、A/S呈中等负相关关系。

In order to provide a reference for the comprehensive utilization and evaluation of the lithium resource associated with the bauxite orebody,the distribution characteristics of lithium and the correlation between lithium and major elements in the bauxite orebodies and bauxite-bearing rocks underneath the coal bed of the Xinggong coalfield in Henan Province have been studied in this paper.It is found that the average Li content of the bauxite-bearing rock is higher than those of the bauxite and clay rock.The distribution of lithium in space is quite different.In the longitudinal direction of the bauxite orebody,Li contents of the bauxite ore and bauxite-bearing rock with relatively dark color in the middle and upper parts of the bauxite-bearing layer are higher than those of the bauxite ore and bauxite-bearing rock with lighter color in the lower part of the layer.In the trend direction,Li contents of bauxite ore and bauxite-bearing rock and thickness of the orebody are gradually decreased from the central part,the eastern part,to the western part of the orebody.In the dipping direction of the orebody,Li contents of bauxite ores in top and bottom parts are relatively high.Li contents of bauxite ore and bauxite-bearing rock in this deposit are decreased with the increase of Al2O3contents.In addition,there is a moderate positive correlation between Li and SiO2 contents and moderate negative correlations between Li and TiO2 contents and between Li contents and A/S ratios.