山东省宁阳县东谷堆贫铁矿床地质特征  

Geological Characteristics of Donggudui Lean Iron Deposit in Ningyang County of Shandong Province

作　　者：李宗成 李先波 刘建生 杜英泉 亓西强 赵雪松 张峰[2] 

机构地区：[1]山东省第五地质矿产勘查院,山东泰安271021 [2]泰安市国土资源局,山东泰安271000

出　　处：《山东国土资源》2005年第6期73-75,共3页Shandong Land and Resources

摘　　要：宁阳县东谷堆铁矿化属晚期岩浆液态分异的熔离矿化,铁矿化体赋存于麻塔单元粗粒变角闪石岩内,矿床由3个矿化体组成,各矿化体相间分布,总体走向均为NW向.矿石自然类型有磁铁阳起角闪石岩、磁铁黑云角闪石岩.矿石矿物以磁铁矿为主,脉石矿物主要为角闪石.矿石具柱粒状变晶结构、鳞片变晶结构、包含结构,浸染状构造、块状构造.矿石品位低,全铁含量一般13.5%～16.5%,最高达19.76%.矿床平均品位TFe 15.15%,SFe8.26%.矿化体裸露地表,适宜露天开采.矿石加工技术性能良好,采用二次精选,一次扫选半闭路式选矿工艺流程.选石结果为:精矿全铁含量62.10%,精矿率11%～12%,回收率31.40%.Donggudui iron deposit in Ningyang county belongs to melting mineralization in late period of magma differentiation. Iron mineralization occurs in coarse epihornblendite. Deposit is composed of 3 metallization ores and distributes in cross with the trend of EW. Natural types of ores are magnetic actinolite hornblendite, magnetic biotite hornblendite. magnetite is major ore mineral, while hornblendite is major vein mineral. Ores have columnar crystalloblastic fabric, lepidoblastic texture, inclusion texture, impregnation structure and block texture. Ore degree is low, average iron content is 13.5%~16.5%, and the highest content is 19.76%. Average degree of deposit is TFe 15.15%, SFe is 8.26%. Ore metallization bared in surface which is suitable for mining. Ore processing technology is good. The ore processing result of TFe is 62.10%, finished ore ratio is 11%~12%, and recovery ratio is 31.40%.

关 键 词：矿床地质特征 宁阳县 山东省 选矿工艺流程 变晶结构 全铁含量 角闪石 矿化体 相间分布 自然类型 矿石矿物 脉石矿物 矿石品位 平均品位 露天开采 技术性能 矿石加工 体组成 磁铁矿 闭路式 回收率 构造 熔离 岩浆 单元 

分 类 号：P618.51[天文地球—矿床学] TD951.1[天文地球—地质学]