山东省沂水县天桥官庄钛铁矿矿床特征

天桥官庄钛铁矿属于岩浆结晶分异矿床,含矿岩石赋存于新太古代晚期红门序列三官寨单元角闪辉长岩中。矿区内共圈定钛铁矿矿体1个,矿体出露长约280 m,宽7~26 m。矿体赋存标高+190~0 m,控制埋深约190 m,最大真厚度42.69 m,最小真厚度4.64 m,平均真厚度14.99 m,属厚度较稳定的矿体。矿石m Fe含量7.05%~21.78%,平均品位13.33%;Ti O2含量2.48%~6.30%,平均品位4.33%;(m Fe+Ti O2)含量11.13%~28.05%,平均品位17.66%。角闪辉长岩在地表风化形成灰黑色土壤,与花岗岩风化形成的淡红色土壤有明显的区别,为其重要的找矿标志。

Geological Characteristics of Tianqiaoguanzhuang Ilmenite Deposit in Yishui County in Shandong Province

Tianqiaoguanzhuang ilmenite deposit belongs to magmatic differentiation deposit. Its orebearing rocks occur in hornblende gabbro of Sanguanzhai unit in late Neoarchean Hongmen sequence. Ilmenite ore body has been delineated in this area. The length of the orebody is about 280m, the width is 7~26m, existing elevation is +190~0m, controlled depth is about 190m, the maximum true thickness is 42.69m, the minimum true thickness is 4.64m, and the average true thickness is 14.99m. The thickness of ore bodies is stable . MFe content of ore is 7.05%~21.78%, the average grade is 13.33%, the content of TiO2 is 2.48%~6.30 %, the average grade is 4.33%, the content of (MFe + TiO2) is 11.13% ~28.05%, and the average grade is 17.66%. Hornblende gabbro formed grayblack soil due to weathering in the surface. It is different significantly from pink soil formed by granite due to weathering. This is an important symbol of prospecting .