芙蓉矿田白腊水锡矿矿化特征及找矿意义

白腊水锡矿床是在新一轮地质大调查中发现,并进行了初步评价的大型矿床.该区断裂构造发育,构造线以NNE-NE向为主,并控制着锡矿带的分布.通过该矿床矿化特征的研究认为:①白腊水矿区到处发育的石英脉可能是锡矿化作用的同期产物;②矿脉内的锡矿化可能极不均匀,高品位的地段一般在构造破碎强烈地方;③该区不同岩体的成矿元素含量明显高于地壳花岗岩类岩石的平均值,有些高出数十倍,具良好的含矿性;④该地区的岩浆岩的稀土元素组成特征极为相似,岩(矿)石稀土元素球粒陨石标准化曲线具有相同的变化特点,显示出岩(矿)石可能为同一岩浆房演化的产物;同时反映出矿化可能与细粒花岗岩关系更密切.

ORE-FORMING CHARACTERISTICS AND PROSPECTING SIGNIFICANCE OF THE BAILASHUI TIN DEPOSIT IN THE FURONG OREFIELD

The Bailashui tin deposit is a large new-finding and preliminary evaluating deposit in the new round of geological survey. Fault structures, mainly NNE-NE directions, are well developed in the deposit and control the distribution of tin ore belts. After discussion on mineralizing characters, it is concluded that, (1) quartz veins distributed in all places of the Bailashui mine are synchronous results with Sn mineralization; (2) Sn mineralizing are higher varying and high-grade Sn ores are generally located in strong structural fractures; (3) ore-forming elements in different rock bodies of the area are obviously higher than earth the average of crustal granite with some elements in the rock bodies several decade higher, showing significant ore potentiality; (4) REE constitute characteristics of magmatic rocks in the region is extremely resemble, REE chondrite standardize curve of rocks and ores in the Bailashui mining area have the same variety characteristics, displaying the rocks and ores are evolving results of the same magma and tin mineralization is tightly related with fine-grained granite.