承德大乌苏沟含钒钛磁铁矿矿床地质特征与控矿因素探讨

Discussion on geological characteristics and ore-controlling factors of V-Ti-bearing magnetite deposit in Dawusugou district of Chengde

大乌苏沟含钒钛磁铁矿位于河北省承德市大庙一带,地处华北地台北缘燕山台褶带和内蒙地轴的交接地带,大乌苏沟铁矿受红石砬—大庙的深断裂及次级构造和大庙斜长杂岩体控制,成矿构造以NE向压扭性构造为主,NW向压扭性构造次之。矿体成群产出,形状多成脉状、似层状,具有雁行叠瓦式分布产出规律。主要有致密块状矿石组成,矿石结构主要为格状溶离结构、海绵陨铁结构;矿石多为块状和浸染状构造。

The V-Ti-bearing magnetite deposit is located in Damiao district of Chengde in Hebei Province.The tectonic location is in the interjunction area of the Yanshan craton and the fold belt on the northern margin of the Huabei craton with Neimongolia earth-axis.Dawusugou iron deposit is controlled by Hongshila-Damiao deep fault and its secondary structures and Damiao anorthitite complex.The metallogenic structure is mainly compression shear structure in NE direction,and NW compression shear structure is in the second order.The ore body is mainly in vein,sub-layered shape with occurrence of groups.The ore body distribution and occurrence is in the regularity of echelon imbricate type.The ore body is mainly composed of density lump ore.The ore textures are mainly lattice dissolution texture and sideronitic texture.The ore structures are mostly massive and disseminated structures.