The change of oreoccurrence is the result of ore expansion and contraction, and branch recombination and thinning out.
指出矿体产状变化是矿体膨胀收缩、分支复合和尖灭再现的结果。
2
For prospective iron ore area or an anomaly zone, where the oreoccurrence regularity has not been thoroughly studied , detailed geological investigation and mapping should be made.
对已工作过的铁矿远景区（带），而矿产赋存规律尚不清楚的区段或磁异常区，应加强研究和填制地质图；
3
Compared with other production section, south section ore scale, shape and occurrence are different, and it is difficult to control mining dilution rate in this section.