矿床的一般特征 凡口矿床位于华南准地槽粤中海西坳陷带北段。 该矿床主要赋存于中、晚泥盆世碳酸盐建造中,其次,赋存于早石炭世细碎屑岩-碳酸岩建造中。中、晚泥盆世碳酸盐建造以岩石中普遍含陆源碎屑石英、夹有黄铁矿页(板)岩或粉砂质页岩夹层、化石丰富、炭质和泥质含量较高为特征。 矿体多为似层状和透镜状,其次为脉状和囊状。 矿石的矿物组成比较简单,主要矿石矿物为闪锌矿,方铅矿、黄铁矿和菱铁矿,并可见少量毒砂;脉石矿物主要为石英、方解石、白云石、绢云母或水白云母等。黄铁矿常与闪锌矿和方铅矿伴 General Characteristics of the Deposit The Fankou deposit is located in the northern section of the middle and western Guangdong Depression of the South China Quasi-Terrain. The deposit mainly occurs in the Middle and Late Devonian carbonate formation, and secondly, occurs in the Early Carboniferous fine clastic rock-carbonate rock formation. In the middle and late Devonian carbonate rocks, terrestrial detrital quartz was commonly found in the rocks, intercalated with pyrite sheet (plate) rocks or silty shale interbeds, with rich fossils and high carbon and clay contents feature. The orebodies are mostly stratified and lenticular, followed by veins and sacs. Ore mineral composition is relatively simple, the main ore minerals are sphalerite, galena, pyrite and siderite, and shows a small amount of arsenopyrite; gangue minerals are mainly quartz, calcite, dolomite, sericite or water white clouds Mother and so on. Pyrite is often associated with sphalerite and galena