宜昌磷矿田划分及资源潜力预测

Division of Orefield and Resource Prediction of Yichang Phosphate Ore Field

宜昌磷矿田位处黄陵断穹北部,归属保康—宜昌磷矿带,其成矿时代属晚震旦世陡山沱期,为浅海台地沉积型磷块岩矿床。宜昌、兴神及保康磷矿田在时空上有着密切联系,它们的成磷地质条件与矿床类型相同或相似,应统归为保康—宜昌磷矿带,其中,新华断裂为宜昌磷矿田的西部边界。此外,单独划分出钟祥—南漳磷矿带。根据矿田含磷岩系岩相条件、矿层厚度变化规律及典型矿床模型参数等因素,采用矿床模型综合地质信息—体积法对宜昌磷矿田资源量进行了预测。结果表明,宜昌磷矿田深部找矿潜力巨大。

Yichang phosphate ore field attributed BaoKang-Yichang phosphate ore zone,is located at the northern Huan- gling faulted dome. Its mineralization age is Late Sinian Doushantuoan. Ore fields of Yichang, Xingshen and Baokang are related in time and space. They should be classified as one phosphate ore zone because of the same phosphorus geological conditions. According to the lithofaeies, variation law of seam thickness and model parameters of deposit, the paper pre- dicts orefields resources by information-volume method. The results show that Yichang phosphate orefield has great poten- tial of deep prospecting.