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快速高效的勘探方法对海洋地质和矿产资源保护意义重大,结合航空电磁和海洋电磁两种方法的优势以及海洋磁测的特点,提出海空联合电磁勘探模式,水中固定或拖拽大电流水平电偶极子激发源,空中采用无人或有人操纵飞行器承载磁传感器接收三分量磁场。采用海洋电磁一维频率域数值模拟程序,对空中三分量磁场与测线布置、发射频率、海水深度、储层埋深、储层厚度、储层电阻率及飞行器飞行高度等几个重要因素之间的关系进行了研究。结果显示,海空联合电磁勘探模式对浅海金属矿产等低阻异常的发现有明显效果,磁异常归一化幅度变化为-10%~80%,为海洋矿产资源的高效大面积调查提供了一条有效的途径。
Rapid and efficient exploration methods are of great significance for the protection of marine geology and mineral resources. Combining the advantages of the two methods of airborne electromagnetism and marine electromagnetism and the characteristics of marine magnetic surveying, the paper proposes the combination of sea-air electromagnetic prospecting mode, fixed or towed high-current level electric water Dipole excitation source, no one or some man in the air to manipulate the aircraft bearing magnetic sensors to receive three-component magnetic field. One-dimensional oceanic electromagnetic field numerical simulation program is used to analyze the three-component magnetic field and the layout of the survey line, the emission frequency, seawater depth, reservoir depth, reservoir thickness, reservoir resistivity and aircraft flight altitude The relationship between the research. The results show that the sea-air electromagnetic prospecting model has obvious effect on the discovery of low-resistivity anomalies such as shallow sea metal minerals. The normalized range of magnetic anomalies varies from -10% to 80%, providing a large-area and large-area survey of marine mineral resources Effective way.