河南雁岭石墨矿床地质特征与外围找矿方向

Geological characteristics and peripheral prospecting direction of Yanling graphite deposit in Henan

河南省雁岭石墨矿床地处秦岭褶皱系东段,属秦岭褶皱系北秦岭褶皱带朱阳关—柳泉铺石墨成矿带,区内石墨矿赋存于秦岭群雁岭沟组片麻岩中。在总结雁岭石墨矿床地质特征、控矿因素与找矿标志的基础上,分析了矿床成因。含矿岩系为区域变质作用形成的大理岩类和片麻岩类等变质岩组合,矿床成因为区域变质型晶质石墨矿床。研究表明,矿床沿NW-SN向展布,与区域构造方向一致,矿体主要呈脉状、似层状或大透镜状整体顺层产出于古元古界秦岭群雁岭沟组中。在矿区外围西北部的北山根及东侧的符竹园一带发现一些较有规模的石墨矿体,可作为下一步找矿工作方向。

Yanling graphite deposit in Henan Province is located at the eastern part of Qinling fold system.It belongs to Zhuyangguan-Liuquanpu graphite metallogenic belt of North Qinling fold belt.The graphite orebody in the area is hosted at the gneiss of Yanlinggou formation of Qinling group.On the basis of summary of the geological characteristics and ore-controlling factor of Yanling graphite deposit,this paper analyzes the deposit genesis.The ore-bearing rock series are the assemblage of metamorphic rocks such as marble and gneiss formed by regional metamorphism,and the deposit genesis belongs to regional metamorphic crystal-line graphite deposit.The study shows that the deposit is distributed along the NW-SE direction,which is consistent with the striking direction of regional structure.The orebodies are mainly in vein,stratoid or large lens shape,and the whole bedding occurs in the Yanlinggou formation of the Paleoproterozoic Qinling group.On the periphery of the mining area,some scale graphite orebodies are found in Beishangen in the northwest and Fuzhuyuan in the east of the mining area,which can be regarded as the next peripheral prospecting direction.