陕西省华县笔尖山一带钨矿地质特征及矿床成因浅析

GEOLOGY AND GENESIS OF TUNGSTEN DEPOSITS IN BIJIANSHAN AREA OF HUAXIAN COUNTY,SHAANXI PROVINCE

华县笔尖山钨矿位于华北地块西南缘,主体位于华北地块中的豫陕隆起区。区内主要为燕山期的老牛山岩体,岩体内小节理较为发育,尤其是与南部熊耳群接触部位,节理裂隙充填的石英脉与钨矿化关系密切。通过预查,发现区内多条含钨矿化构造蚀变带,圈出了3条钨矿体。区内节理、裂隙密集发育,岩浆活动强烈,钨矿点较多,是以钨为主的重要多金属找矿靶区,深部找矿潜力较大。

Bijianshan area in Huaxian County is located in the southwest margin of the North China Block,the main body of which lies in the Henan-Shaanxi uplift area.The Laoniushan rock mass of the Yanshanian period is developed well in this area,in which small joints are relatively developed especially in some contacts with the southern Xiong′er Group and quartz veins filled in the joints and fractures are closely related to tungsten mineralization.Pre-prospecting of ores in this area has discovered multiple structural alteration zones containing tungsten mineralization,from which three tungsten mineralized zones have been delineated.The joints and fissures in the area are densely developed with strong magmatic activity and many tungsten occurrences.This area belongs to an important polymetallic prospecting target area,dominantly in tungsten mineralization with a great potential for further ore prospecting.