土壤磁性组分测量在干旱荒漠区找矿中的有效性探讨

Application of soil magnetic component measurement technique in mineral prospecting in arid desert landscape

土壤热磁组分测量是近年来研究提出的一种新技术,在覆盖区找矿中显示出一定前景。新疆东准噶尔地区琼河坝一带属极干旱荒漠戈壁区,风成砂覆盖较普遍,常规的化探方法技术受到限制。笔者在该区以新疆蒙西斑岩铜矿为例,进行了土壤磁性组分测量可行性试验。试验发现,干旱荒漠区土壤中热磁组分含量较少,不具备开展热磁组分测量的条件,同时发现土壤中含有较多的天然磁性组分,这部分磁性组分以蚀变岩屑等物质为主,蕴含较丰富的矿化信息,找矿效果值得期待。

Soil thermal magnetic component measurement technique is newly developed, and has shown efficient application for mineral exploration in the dense cover area. Qiongheba area, eastern Junggar, Xinjiang, is the arid gobi desert area, and thick windy sands covered, the traditional geochemical technique is limited for exploration. The authors selected the Mengxi Cu deposit located in Qiongheba area as experimental study of applying the soil thermal magnetic component measurement technique for the exploration purpose. The experimental application showed that there is less thermal magnetical components in soil but rich natural magnetic components in soil which are resulted from the remained altered rock clasts. Considering that the altered rock clasts contain rich mienralization information, therefore, it is worth of applying soil thermal magnetic component measurement technique for mineral exploration in this area.