瞬变电磁探测系统(CASTEM)试验对比——安徽颖上大王庄铁矿

为推进国产电磁勘探设备的高端化进程,自主研发了CASTEM瞬变电磁系统.在前期系统开发、测试及集成基础上,开展野外试验研究,以检验CASTEM系统的稳定性及探测能力.选择已取得显著勘探成果的安徽颖上县大王庄铁矿进行试验,试验内容包括大功率发射机性能、接收系统噪声性能、实测响应曲线和反演效果,并与国际高端瞬变电磁仪在上述几方面进行了对比.试验结果表明CASTEM系统的各项指标性能稳定、可靠,已达到国际先进水平;探测成果与高端瞬变电磁仪器探测成果以及钻孔资料相吻合,表明CASTEM系统可以用于深部勘探.

Contrast test of the transient electromagnetic system (CASTEM) at the Dawangzhuang iron mine in Anhui province

In order to accelerate the high-level oriented process of homemade electromagnetic prospecting instruments, the transient electromagnetic system (CASTEM) was developed independently. A field experiment was implemented to test the stability and the maximum detecting depth of the CASTEM system after a lot of efforts on subsystem development, testing and system integration. The location of field test was chosen at the Dawangzhuang iron mine in Anhui Province, where the geological characters are typical and significant productions of prospecting have been conducted. The content of the field test included the performance of high-power transmitting, noise performance of the receiving system (sensor and receiver), observed decay curves and the effect of inversion in contrast with the top import TEM instrument. The results of the field test agreed with the drilling data available in this mine.