磁法勘探在新疆叶城磁铁矿勘查和评价中的应用

Magnetic exploration application in magnetite of Yecheng,Xinjiang

新疆叶城磁铁矿为隐伏矽卡岩型矿床,矿石品位高,矿体由多个串珠状小矿体组成。利用大比例尺磁测工作,圈定了矿体的分布范围。并利用磁异常推断了矿体的空间分布状态,估算了磁铁矿的储量。经过多年开采之后,为了了解剩余储量,又进行了第二次磁法测量,根据磁异常幅度和形态的变化,估计了剩余储量。根据采矿情况的验证,说明在地质条件简单的情况下,可以利用磁测资料圈定磁性体的范围,并估算储量,给采矿工程提供可信的参考信息。

The magnetite deposit in Xinjiang is a concealed skarn deposit with high grade and many small ore bodies. The distribution range of ore body is delineated by using large scale magnetic survey. The spatial distribution state of the ore body is inferred by magnetic anomaly, and the reserves of magnetite are estimated. After years of mining, in order to understand the remaining reserves, and carry out the second magnetic measurement, according to the variation of magnetic anomaly amplitude and shape, to estimate the remaining reserves. According to the verification o~ mining conditions, it is indicated that, under the condition of simple geological conditions, the magnetic field can be used to delineate the range of magnetic body and to estimate the reserves, which can provide credible reference information for mining engineering.