河南省栾川县扎子沟钨钼矿区矿床成因浅析

TUNGSTEN-MOLYBDENUM GENESIS AT ZHAZIGOU ORE AREA IN LUANCHUAN

栾川县扎子沟矿区位于华北地块南缘与秦岭褶皱带的结合部位,栾川钼钨铅锌矿集区的中部。本文在讨论成矿地质背景的基础上,论述了扎子沟矿区钨钼矿控矿因素。官道口群白术沟组(Qnb)及栾川群三川组(QnZs)、南泥湖组(QnZn)是本矿区的主要含矿地层。黄背岭—石宝沟复式背斜和北西西向断裂、石宝沟和鱼库燕山期斑状二长花岗岩体控制着钨钼矿体产出状态。并研究了与钨钼矿化有关的矿石类型、围岩蚀变、成矿富集条件、以及有利于成矿的地球化学条件。分析了钨钼矿体在时间和空间上的分布规律,总结出扎子沟钨钼矿矿床成因,对以后的找矿工作具有一定的指导意义。

Luanchuan Zhazigou tungsten-molybdenum ore deposit locates in eastern section of junction between the North China platform south edging and the Qinling fold belt, and locates in the core of Luanchuan centralization W- Mo-Pb-Zn ore deposits. Ore-controlling factors of Zhazigou tungsten-molybdenum ore deposit were discussed based on its geological features. The ore-forming layers are the Baishugou group （ Qnb） of Guandiaokou group, and the Sanchan group （ QnZs） and the Nannihu group （ QnZzi） of Luanchuan group. Tungsten-molybdenum ore deposit ore- bodies output modes are controlled by Huangbeiling-shibaogou anticlinorium, NWW fault, and yanshanian porphy- ritic monzonite granite of both Shibao and yuku. The molybdenum-mineralization relations with ore types, wall-rock alteration, mineral enrichment conditions, and ore-forming geochemical conditions were discussed. Tungsten- mo-lybdenum ore bodies in time and space distribution were analyzed, and the genesis of Zhazigou tungsten-molybde-num ore deposit were summarized. It has guiding significance for future prospecting.