辽西杨家杖子-八家子钼多金属成矿带——典型钼矿床特征及找矿远景预测

THE YANGJIAZHANGZI-BAJIAZI MOLYBDENUM-POLYMETAL METALLOGENIC BELT IN WESTERN LIAONING PROVINCE: Characteristics of typical molybdenum deposits and prediction for exploration

辽西杨家杖子-八家子钼多金属矿成矿带钼矿床与燕山期中酸性岩体关系密切.产于花岗质岩类与碳酸盐岩地层接触带的钼矿床为夕卡岩型或斑岩-夕卡岩型钼矿床.产于花岗斑岩、长英质或中性火山岩内的钼矿床多为斑岩型钼矿床.不同类型钼矿床在成因、分布规律以及成矿元素的分带性上有着密切的时空关系.钼矿床的成矿物质来源于花岗岩,细粒花岗斑岩是主要成矿母岩.从成矿条件分析可确定,该钼多金属成矿带的找矿远景可观.

The molybdenum deposits in the Yangjiazbangzi-Bajiazi molybdenum-polymetal metallogenic belt in Western Liaoning Province are closely related to Yanshanian acid-intermediate intrusion. The deposits that occur in the contact zone between granitoid and carbonate strata are skarn or porphyry-skarn type. The deposits hosted in granite-porphyry and felsic or intermediate volcanic rocks are mostly porphyry type of molybdenum deposits. The molybdenum deposits with different types share close spatiotemporal relations in genesis, distribution and zonation of ore-forming elements. The ore matters of the molybdenum deposits are derived from granite. The fine-grained granite is the parent rock for metallogenesis. Analysis on the metallogenic conditions shows a great prospect for exploration in the metallogenic belt.