水成铀矿床含矿层中地浸成因的地球化学障  

GEOCHEMICAL BARRIERS FORMEO OURING IN-SITU LEACHING IN ORE-BEARING HORIZONS OF HYDROGENIC URANIUM DEPOSIT

作　　者：李田港 

机构地区：[1]俄罗斯科学院金属矿床地质,岩石,矿物,地球化学研究所,核工区业北京地质研究院

出　　处：《铀矿地质》1994年第6期321-333,共13页Uranium Geology

摘　　要：以层状淋滤成因铀矿床为例，研究主要成矿元素和伴生元素在地浸液向未变化的自然水过渡界限上的行为。这里确定了中和地球化学障以及与它有关的次级障──去气障、中和障等。在这些障上进行着铀、稀土元素和一系列其它元素的现代堆积。指出了这一过程中地下微生物的作用。测定了赋矿陆源岩石的中和容量。评估了所研究体系中物质的带出、迁移和再沉淀的规模。作出的主要结论是：所研究的地质介质具有足够的保护性质，以对抗地浸液的直接的、强烈的作用。The behaviour of major metallogenetic element and associated elements on the boundary of the leaching solution transiting to the unchanged natural water in a layered uranium deposit of infiltration origin is studied.Neutralization geochemical barrier and their relevant secondary barriers-degassing barrier and neutralization barrier are defined,and recent accumulation of uranium,rare earth elements and a series of other elements at these barriers are in progress.The action of underground microorganism during this process is pointod out;the neutralization capacity of the ore-hosting terrigenous rocks is determined.and the dimension of the matter removal,migration and reprecipitation in the studied system is evaluated. The principal conclusion is that the studied geological media have sufficient protective nature to resist direct and strong leaching action of the solution.

关 键 词：铀矿床 地球化学障 地浸作用 天然水 成因 

分 类 号：P619.140.1[天文地球—矿床学]