地物化综合方法在新县陡山萤石矿勘查中的探索应用

萤石矿属于我国战略性矿产,随着地表和浅部萤石资源逐渐枯竭,未来不断加大萤石矿资源勘查力度、进度及增加萤石储量势在必行,根据工作区成矿特征及规律,选择合理地物化综合方法能够高效提高浅覆盖区、深部萤石矿体的找矿效率。本文根据河南省新县陡山萤石矿的成矿特征及规律,依托土壤地球化学测量所圈定的氟元素异常区快速定位预测隐伏萤石矿体的成矿远景区。开展地表追索及异常查证,结合可控源音频大地电磁测深重点区段剖面解译成果,推测控矿构造在深部延伸的规模及方向,预测萤石矿化带在深部的成矿空间、成矿规律,利用钻探工程对重点预测区进行深部验证,初步发现8条萤石矿体,获取萤石(333)+(334)矿石量64.08万吨,为该区进一步开展萤石矿勘查提供了重要的依据。

Exploration and application of comprehensive geophysical and geochemical method in Doushan area of Xinxian County in fluorite exploration

Fluorite is a strategic mineral in China. With the gradual depletion of surface and shallow fluorite resources, it is imperative to continuously increase the exploration intensity and progress of fluorite resources and increase fluorite reserves in the future. Combined with the metallogenic characteristics and laws of the working area, the selection of reasonable geophysical and geochemical comprehensive methods can effectively improve the prospecting efficiency and quality of shallow overburden areas and deep fluorite ore bodies. Based on the metallogenic characteristics and laws of fluorite deposits in Doushan area, Xinxian County, Henan Province, this paper delineates the fluorine anomaly area by relying on soil geochemical survey, quickly locates and predicts the metallogenic prospect area of concealed fluorite ore body, closely follows the surface tracing and anomaly verification of traditional geological survey, and speculates the scale and direction of the extension of ore controlling structure in the deep part in combination with the profile interpretation results of key sections of controllable source audio frequency magnetotelluric sounding, predict the deep metallogenic space and metallogenic law of fluorite mineralized zone, verify the key prediction area in the deep part of drilling engineering, preliminarily find 8 fluorite ore bodies, and estimated fluorite ore volume is 640800 tons in (333)+(334), which provides an important basis for the comprehensive geophysical and chemical exploration of fluorite ore in this area.