内蒙古昌图锡力地区锰银铅锌多金属矿的找矿标志

The prospecting criteria of Mn-Ag-lead-zinc polymetallic ore in Changtuxili area of Inner Mongolia

内蒙古昌图锡力地区地表覆盖严重,地质找矿标志不明显。本次利用1/1万土壤测量、地面高精度磁法测量及激电中梯测量等方法对1/5万水系沉积物测量异常进行查证,通过对物化探异常套合地段开展工程验证,取得了较好的找矿效果。从已发现矿体的空间分布特征来看,地表具有黑色、灰黑色氧化锰矿化蚀变的岩石,可作为寻找锰、银、铅、锌多金属矿体的直接标志;Mn、Ag、Pb、Zn土壤地球化学异常浓度高、元素全、套合好的区域可以作为地球化学找矿标志;线性的弱负磁异常带可以作为磁性方面的找矿标志;高极化率、中高电阻率可以作为电性方面的找矿标志。昌图锡力地区找矿标志的确立,可为该区域寻找同类型矿床提供新的依据。

The surface coverage is serious and the ore-prospecting criteria is not obvious in Changtuxili area of Inner Mongolia. The anomaly of 1/50 000 stream sediment survey was verified by using 1/10 000 soil survey, ground high precision magnetic measurement and IP ladder measurement method. The trenching engineering exposure was carried out at the set of geophysical and geochemical anomalies and getting remarkable ore prospecting results. Spatial distribution characteristics of ore bodies show that the MnO altered rocks of black and gray ferrous metals on the surface can be used as direct indicators for prospecting of polymetallic ore bodies. Areas with high geochemical anomaly concentration, complete elements and well suited elements in Mn, Ag, Pb and Zn soils can be used as geochemical prospecting indicators. The linear negative magnetic anomaly band can be used as a magnetic prospecting indicator. The high in chargeability and middle-high resistivity can be used as the indicators for ore peospeciting. The determination of ore-prospecting criteria in Changtuxili area can provide new basis for searching the same type of deposites in the region.