陕西省闹阳坪萤石矿床地质特征

Geological features of fluorite deposit in Naoyangping,Shaanxi Province

陕西省闹阳坪萤石矿床位于陕南泗王庙-平利成矿带东端,产于志留系竹溪群浅变质碎屑岩与加里东期碱性粗面岩接触带的顺层破碎带中。矿体规模厚大。在分析矿床地质背景、构造特征、矿石矿物特征及围岩蚀变特征的基础上,指出该矿属交代(充填)型萤石矿床,找矿标志主要是接触带、断裂构造、围岩蚀变等。

Nao Yang Ping fluorite deposit in Shaanxi lies in the Eastern end of the Wangmiao-Pingli Metallogenic belt in southern Shaanxi,produced in the bedding fracture zone of the contact belt of the metamorphic clastic rocks in Silurian Zhuxi group and the alkaline trachytes of Caledonian.The orebody scale is thick and large.On the basis of analysising deposit＇s geological background,structural features,ore mineral characteristics and the characteristics of wall-rock alteration,it point out that the mine is belong to metasomatic？（filling） fluorite？depositfluorite deposit,the main ore guide is the contact belt,the faulting tectonics,the wall-rock alteration and so on.