Joint application of surface nuclear magnetic resonance and high-density resistivity method in the exploration of potassium ore in salt lake brine in Tibet
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摘要: 地面核磁共振法可直接寻找地下水(卤水),高密度电阻率法在判断卤水与淡水方面较为适用。应用上述两种物探方法在西藏扎仓茶卡盐湖和茶里错盐湖进行了联合探测,查明了研究区地下卤水的分布情况,避免了单一方法的局限性和片面性,为西藏两大盐湖卤水钾矿的勘查开发总体布局提供了依据。同时,结合地质浅井资料进行了对比分析,发现两种物探方法联合探测的结果与浅井资料较为吻合,表明应用上述两种物探方法可为西藏地区的地下卤水探测提供一种高效、精准的勘探模式。Abstract: Surface nuclear magnetic resonance (SNMR) can be used to directly find groundwater (brine), and the high-density resistivity method is suitable to distinguish brine from fresh water. This study introduces the joint exploration using the above two geophysical methods in two major salt lake study areas in Tibet-Chagcam Caka and Chalico salt lakes, in order to make full use of the advantages of the two methods while avoiding the limitations and one sidedness of a single method. As a result, the distribution of underground brine in the two salt lakes was identified, thus providing a basis for the overall layout of the exploration and development of potassium ore in brine in the two salt lakes. Furthermore, the joint exploration results of the two geophysical methods were highly consistent with the geological survey results of shallow wells. It can be concluded that the joint application of the above two geophysical methods in Tibet serves as an efficient and accurate exploration mode for the exploration of underground brine.
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Key words:
- surface nuclear magnetic resonance /
- high-density resistivity method /
- salt lake /
- brine
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