地面高精度磁测在隐伏铁矿勘查中的应用——以山东省禹城市李屯地区铁矿为例

Application of HighPrecision Magnetic Measurement in Exploration of Hidden Iron Deposit —Setting Iron Deposits in Litun Area of Yucheng City in Shandong Province as an Example

摘要:

山东省禹城市李屯地区铁矿是赋存于巨厚层新生代地层下的矽卡岩型铁矿床。利用地面高精度磁测对该地区航测地磁异常进行查证，进一步圈定了地磁异常范围。通过对地磁异常ΔT数据的位场转换处理，圈定4个地磁高值异常区，选取其中1个异常区进行钻探验证，首次在鲁西北地区发现了品位高、厚度大的矽卡岩型铁矿，地质找矿工作取得突破性进展。

Abstract:

Litun iron deposit in Yucheng city in Shandong province is a skarn type iron deposit covered by the Quaternary system.The geomagnetic anomaly of the area is verified by high precision magnetic measurement on the ground, which further delineates the geomagnetic anomaly range. Through field conversion of the geomagnetic anomaly ΔT data, four geomagnetic anomalies are delineated, and one of the anomalies is selected for drilling. For the first time, a skarntype iron deposit with high grade and large thickness is found in the northwest of Shandong province. Geological prospecting work has achieved an important breakthrough.