山东兰陵会宝岭铁矿深部矿体特征及找矿方向

会宝岭铁矿为隐伏矿床,发育2条主矿带,矿带总体走向280°～290°,平行展布,相向而倾,表现为不对称向斜构造特征。两条矿带包含南北两翼5个矿体,其南翼矿带沿走向自西向东具有逐渐变宽的趋势,而北翼矿带自西向东则有收缩变窄的趋势。矿床赋存于泰山岩群山草峪组中,产状与地层产状基本一致,上覆盖层为青白口纪至早寒武纪沉积地层。矿带顶底板围岩为黑云变粒岩或黑云角闪片岩。本文在全面总结分析会宝岭铁矿床以往成果资料和找矿方法的基础上,分析了区域成矿规律,研究了矿区内构造对铁矿的控制规律,探讨了铁矿床成因,确定了区内主要找矿标志,建立了勘查模型,指出了找矿方向。

Characteristics and Prospecting Direction of Deep Ore Bodies in Huibaoling Iron Deposit in Lanling County in Shandong Province

Huibaoling iron deposit is a hidden deposit and developed two main ore belts. The overall strike of the ore belts is 280°~290°. They are parallel and inclined to each other and show the structural characteristics of asymmetric syncline. The two ore belts contain five ore bodies in the north and south parts. The south part ore belt has a trend of gradually widening from west to east along the strike, while the north ore belt has a trend of shrinking and narrowing from west to east. The deposit occurs in Shancaoyu formation of Taishan group, and its occurrence is basically consistent with attitude of stratum. The overlying caprock is Qingbaikou to early Cambrian sedimentary strata. The surrounding rock of roof and floor of ore belt is biotite granulite or biotite hornblende schist. In order to summarize the genesis and ore controlling factors of Huibaoling iron mine, find out the resource prospect in the depth (more than 400m deep) of the mining area, and better guide the future prospecting direction, this study was carried out. Based on the comprehensive summary and analyze the previous achievements and prospecting methods of Huibaoling iron deposit, regional metallogenic law has been analyzed, the control law of the structure in the mining area on iron ore has been studied, the origin of the iron deposit has been studied, main prospecting indicators in the area have been determined, the exploration model has been established, and the prospecting direction has been pointed out.