甘南州迭部县洛达铁矿查居矿段矿体特征浅析

Analysis of Orebody Characteristics in Chaju Section of Luoda Iron Mine,Dibe County,Gannan Prefecture

查局矿段位于查局矿区中部,矿区位于秦岭东西构造带白龙江复背斜的北翼于泥盆系地层之中,主要矿种为铁矿,主要含矿地层为中泥盆统第四分层,矿段共有十个矿层,其中主要有Ⅰ、Ⅱ、Ⅶ、Ⅷ矿体,矿石类型为赤铁矿富矿。主要矿体均赋存于厚层灰岩中,控矿断裂构造常沿两者之界面或邻近界面处通过,加之矿液对灰岩之交代作用所致,认为该矿床为中温热液型矿床。

The Chaju ore block is located in the middle of the Chaju mining area,which is located in the northern wing of the Bailongjiang complex anticline in the Qinling East-west structural belt in the Devonian strata.The main mineral species are iron ore,and the main ore-bearing strata are the fourth layer of the Middle Devonian Series.There are ten ore layers in the ore block,among which the main ore bodies areⅠ,Ⅱ,ⅦandⅧ,and the ore type is hematite rich ore.The main ore bodies exist in the thick limestone,and the ore-controlling fault structure usually passes along or near the interface of the two,which is caused by the metasomatism of the limestone by the mineral fluid.It is considered that the deposit is of mesothermal hydrothermal type.