江西省弋阳县狮子包铁矿地质特征及找矿方向

Geological Characteristics and Prospecting Direction of Shizibao Iron Deposit in Yiyang County,Jiangxi Province

弋阳县狮子包铁矿属沉积变质型铁矿床,位于扬子板块与华夏板块接壤带的南侧,赣中沉积变质型铁矿带东部,铁矿体主要赋存在南华系洪山组上部含铁岩系中,层位较稳定,矿体多呈似层状、透镜状产出;区内岩浆活动及构造运动对铁矿体的形成和规模有一定的影响,矿石矿物以镜铁矿为主,其次为磁铁矿,属贫铁矿型。通过对成矿地质背景和矿床地质特征的阐述,重点研究本区铁矿的成矿地质条件和矿床成因,总结铁矿的找矿标志,并提出今后的找矿方向(区内沉积变质型铁矿),以指导区内铁矿的找矿。

Shizibao iron deposit in Yiyang County belongs to sedimentary metamorphic iron ore deposit.It is located in the south of the border zone between Yangtze plate and Cathaysian plate,and in the east of the sedimentary metamorphic iron ore belt in central Jiangxi.Iron ore bodies mainly occur in the Nanhua iron-bearing rock series of Hongshan Formation of South China Period.The horizon is relatively stable.Ore bodies are mostly layered and lenticular.Magmatic activity and tectonic movement in the area have a certain influence on the formation and scale of iron ore bodies.The ore minerals are mainly specularite,followed by magnetite,which belongs to lean iron ore type.Based on the description of the metallogenic geological background and geological characteristics of the deposit,the metallogenic geological conditions and genesis of the iron ore deposit in this area are mainly studied,the prospecting indicator of the iron ore are summarized,and the prospecting direction in the future is put forward to guide the prospecting of the iron ore in this area.