桐城市高谷岭铁矿成矿地质特征及找矿方向

Geological Characteristics and Prospecting Direction of Gaoguling Iron Deposit in Tongcheng City

高谷岭铁矿是位于桐城市罗岭镇的一处小型隐伏铁矿床,以钻探、地质测量、地形测量、样品分析测试等手段揭露矿区地层、构造、岩浆岩分布、矿体规模及赋存状态等地质特征,在此基础上结合物探异常特征进一步研究矿区岩浆岩的类型、成矿物质来源以及物探异常与矿体的关联,以查明矿床成因类型及控矿因素。结果表明:本矿区矿体赋存于杂岩体中,受构造控制明显,主要为正长岩、二长岩、闪长岩等。矿石自然类型主要为阳起石磁铁矿、磷灰石阳起石磁铁矿、黑云母阳起石磁铁矿类型、浸染状正长岩磁铁矿;其次为石膏阳起石磁铁矿、阳起石赤(镜)铁矿等;工业类型为需选贫磁铁矿石。同时区内磁异常多为磁铁矿(化)体引起,二者关联性较好,下一步找矿可围绕区内尚未有工程验证的磁异常开展工作。

Gaoguling Iron Deposit is a small concealed iron deposit located in Luoling Town,Tongcheng City.The geological characteristics of strata,structure,magmatic rock distribution,ore body scale and occurrence state in the mining area are revealed by means of drilling,geological survey,topographic survey and sample analysis and test.On this basis,combined with the characteristics of geophysical anomalies,the types of magmatic rocks in the mining area,the sources of ore-forming materials and the relationship between geophysical anomalies and ore bodies are further studied to find out the genetic types of deposits and the ore-controlling factors.The results show that the ore bodies in this mining area occur in the complex rock mass,which are obviously controlled by the structure,mainly syenite,monzonite and diorite.The natural types of ore are mainly actinolite magnetite,apatite actinolite magnetite,biotite actinolite magnetite and disseminated syenite magnetite.Followed by gypsum actinolite magnetite,actinolite hematite(mirror)iron ore,etc.The industrial type is to select lean magnetite ore.At the same time,the magnetic anomalies in the area are mostly caused by magnetite(mineralized)bodies,and the correlation between the two is good.The next step of prospecting can be carried out around the magnetic anomalies that have not been verified by engineering in the area.