苍峄铁矿带地质特征及找矿远景分析

Geological Characteristics and Prospecting Future in Cangyi Iron Deposit

苍峄铁矿带是山东省重要的铁矿带之一,已开展了多年的地质勘探工作,但对成矿带缺少总体的地质认识。该文通过分析苍峄成矿带地质背景和矿区地质特征、构造特征、航磁异常特征,总结了成矿规律及找矿远景。研究表明:苍峄铁矿带新太古代泰山岩群山草峪组发育,以黑云变粒岩为主,夹斜长角闪岩、角闪岩、磁铁石英岩、磁铁角闪石英岩,属条带状石英型磁铁矿建造。区内形成了一系列紧密的复式褶皱,自北向南发育太白向斜、石阎背斜、辛庄向斜和后大窑北背斜等。铁矿带具有明显剩余重力高值异常,据此划分了5个铁矿带,分别为Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ铁矿带,指出成矿带深部和航磁异常边部是新的找矿方向,为该区的找矿工作提供了借鉴。

Cangyi iron ore belt is one of the important iron ore belts in Shandong province. Geological exploration work has been carried out for many years, but lack of overall understanding of the geological metallogenic belt. Through analysis on geological background and geological characteristics,tectonic features,aeromagnetic anomaly characteristics of Cangyi mineralization belt, metallogenic regularity and prospecting have been summarized. It is showed that ancient Taishan rock group shancaoyu formation formation developed well. It is mainly composed of bio- tite granulite,accompanied with amphibolite, amphibolite, magnetite quartzite and magnetite hornblende quartz rocks. It belongs to banded quartz magnetite type construction. A series of close double fold were formed in this are-a. They are Taibai syncline,Shiyan anticline,Xinzhuang syncline and Houdayaobei anticline from north to south. I-ron belt has obvious residual gravity high anomaly. Thus,5 iron ore belts have been divided,they are Ⅰ, Ⅱ,Ⅲ,Ⅳ,Ⅴ ore belt. It is pointed out that the metallogenic belt in deep and aeromagnetic anomaly edge are new prospec-ting direction. It will provide some references for the prospecting work.