镇安县铁铜沟铁矿体地质特征及找矿浅析

Geological Characteristics and Mineral Exploration Analysis of Iron Mine in Zhen’an County

镇安县铁铜沟铁矿区位于南秦岭印支褶皱带内的古生代(山阳—柞水—旬阳)沉积盆地偏北缘。区域构造线总体呈近东西向展布,出露地层主要为古生代的1套沉积(浅变质)岩系,褶皱、断裂构造发育。矿产以沉积-改造型为主。K1、K2号铁矿体位于工作区的中部,该文通过阐述铁铜沟铁矿成矿地质背景、矿体地质特征及控矿因素分析,总结矿床成岩成矿环境和成因,认为铁铜沟K1、K2号铁矿体同大西沟铁矿成矿类型和产出特征基本相同,主要为沉积-改造型铁矿床,含矿地层时代属中泥盆,矿床富集除受层位、岩性的控制外,受到构造控制也较明显。

Tietonggou Iron Mine District in Zhen’an County is located at the north edge of the Paleozoic(Shanyang-Zhashui-Xunyang)sedimentation basin in the indosinides fold belt of the southern Qinling Mountains.The regional tectonic line is generally approaching the east-west direction,and the exposed stratum is mainly a set of sedimentary(shallow metamorphic)rocks of the Paleozoic,with fold and fracture structures developing.The minerals are mainly deposit-transformed type.K1,K2 iron ore body is located in the middle of the working area.This paper summarizes the geological environment and causes of the deposit,and believes that K1,K2 iron ore body is basically the same type and shares similar characteristics as Daxigou Iron Mine,which is mainly deposit-transformed iron deposit,with mineral strata belongs to middle devonian.In addition to the control of layer level and lithology,the deposit enrichment is also obvious by structural control.