河南省嵩箕铝土矿带稀土元素地球化学特征及其意义

嵩箕地区是河南省重要的铝土矿成矿带,为了解成矿带区域性稀土元素地球化学特征,进一步研究铝土矿的成矿机制,经过对成矿带多个矿床稀土元素分布特征的研究,结果表明各矿区稀土元素配分模式基本相同,轻稀土分异程度有所不同,从而提出了嵩箕成矿带铝土矿成矿物质来源的新观点。研究认为,宜阳地区铝土矿应归属嵩箕成矿带；该成矿带南北两侧的铝土矿的成矿物质来源不完全一致,在成矿过程中,成矿物质的供应程度不同,特点是北多南少,导致南北两侧矿区矿体间规模和厚度存在明显差异,对进一步研究区内铝土矿的成因具有一定指导意义。

Geochemical characteristics of rare earth elements of Songshan-Jishan bauxite metallogenic belt in Henan Province and its significance

Songshan-Jishan region is an important bauxite metallogenic belt in Henan Province. In order to understand the regional geochemical characteristics of rare earth elements in the belt, and then further study the mineralization mechanism of bauxite deposit. Through the study of rare earth element distribution characteristics of deposits in the belt, the results show that total value and patterns of rare earth elements are basically the same,but the differentiation degree of light rare earth elements is different slightly. Therefore, the new view of bauxite ore-forming material sources in Songshan-Jishan metallogenic belt is put forward. This study believes that the bauxite in Yiyang area should belong to Songshan-Jishan metallogenic belt. The sources of bauxite ore-forming material on the north and south sides of the belt are not exactly same. In the process of mineralization, the supply of bauxite ore-forming material is different, more the north than the south. Which resulted in obvious differences in the size and thickness between the ore bodies. These ideas are of certain significance for further studying the forming cause of bauxite deposits in Songshan-Jishan region.