马达加斯加Ankitsika钒钛磁铁矿地质特征及找矿方向

Geological characteristics and prospecting direction of Ankitsika V-Ti magnetite deposit,Madagascar

Ankitsika钒钛磁铁矿床主要金属矿物为磁铁矿、钛铁矿以及钛磁铁矿,并含有钒和镍黄铁矿。矿体形态为似层状和脉状,矿石主要呈自形—半自形结构、海绵陨铁结构,浸染状、致密块状构造。通过对比国内外典型钒钛磁铁矿地质特征与成矿规律,分析研究岩浆活动和区域构造演化,初步认为该区钒钛磁铁矿的成矿机制与岩浆作用以及区域构造演化关系密切,进一步勘探研究工作应注意辉长岩等基性岩体出露地区。

The main metallic minerals in the Ankitsika V-Ti magnetite deposite are magnetite, titanium and titanium magnetite with accessory vanadium and nickel pyrite. The iron orebody is present as forms of strato and vein, the ore texture and structure are mainly present as euhedral-subhedral and sideronitic texture, disseminated and massive structure. By comparing the domestic and for- eign typical V-Ti magnetite geological features and metallogenic regularities, and analyzing magmatic activities and regional structure e- volution, it is preliminarily thought that the metallogenic mechanism of Ankitsika V-Ti magnetite deposit has close relationship with magmatism and tectonic evolution in the region. Further exploration and research work should pay attention to the area where basic in- trusion such as gabbro is exposed.