山东栖霞市郝家楼铁矿地质特征

Geological Characteristics of Haojialou Iron Deposit in Qixia City of Shandong Province

郝家楼铁矿赋存于新元古代震旦纪蓬莱群豹山口组中,矿体呈层状、透镜状.倾角缓,局部近水平,含矿层厚5～20m,呈互层状产出,东侧Ⅰ号矿体以磁铁矿为主,西侧Ⅱ号矿体以赤铁矿为主,铁矿化受岩性控制明显,赋存于厚层状大理岩或砂质板岩中,以层状、条带状或块状构造为主,层厚一般几厘米-几十厘米不等.品位分布不均匀:Ⅰ号矿体一般25%～40%,Ⅱ号矿体一般6%～10%,局部品位可达58.78%,矿体一般位于山顶或山坡上,抗风化力强.

Haojialou iron deposit occurs in Baoshankou formation of Penglai group in Neoproterozoic Sinian system. Orebodies show as cellar type and lens type. Angle is gentle, and nearly horizontal in regional areas. The depth of ore--bearing is 5-20 m, and occurs ininterbedded type. Ⅰ deposit in east part is mainly composed of magnetic iron deposit ; while Ⅱ deposit in west part is mainly composed of hematite. Iron mineralization is controlled by rock property evidently, and occurs in thick bedding marble and sandy slate. Stratiform, stripped and block structures are its major types, with the depth from few to many centimeters. Grade distribution is nonuniform. The grade of I deposit is generally 25%-45%, Ⅱ deposit is generally 6%-10%, and grade in regional area can reach 58. 78%. Orebodies occur in top of the mountain or in slope with high wind--preventing strengthening.