摘要
本文论述了广西花岗岩风化壳离子吸附型稀土矿床的主要成矿特征,探讨其快速评价方法有关问题。认为该类型矿床在风化壳中的稀土氧化物含量具有分带性,一般存在上贫下富分布规律,并探讨了铈族稀土上富下贫、钇族稀土下富上贫形成机制和分布规律。关于探讨找矿快速评价时,指出:应尽量收集前人资料,重视野外踏勘选点、择优评价工作中涉及有关样品采集及半定量与定量分析方法问题。
This paper has dealt with the principal metallogenic characteritics of ion-absorbed-type REE deposit in weathering crust of granite in Guangxi and discussed some problems concerning the method of quick evaluation. The author believes that this type of
REE deposit has zonality in the content of REE oxides in weathering crust-generally
speaking it gets poorer upward and vise versa. It has discussed the forming mechanism and distributing law of the Cerium group elements (rich upward and poor downward) and the Yttrium group elements (poor upward and rich downward) . As to discussing the quick evaluation of prospecting, this paper has pointed out that the predecessors' information should be collected as much as possible, the problems of method concerning related collection as well as semiquantitative and quantitative analysis of samples in the field geological exploration and chose point and the preferred evaluation should be paid attention to.
