地气溶胶勘查地球化学方法及其在金窝子金矿中的应用

THE APPLICATION OF THE AEROSOL GEOCHEMICAL EXPLORATION METHOD TO THE JINWOZI GOLD DEPOSIT

论述了将气溶胶理论和技术应用于深部隐伏矿找矿的基本问题。深部矿物质能够穿越矿体覆盖层到达地表，主要是通过气体携带质粒向上迁移，这种迁移发生的基本条件是质粒可以稳定悬浮于气体中并随之流动。气溶胶理论表明，直径在0．1～2．5μm的质粒在气体中最稳定，质粒过小或过粗都不可能较长时间悬浮于气体中。气溶胶的另一个理论要点是，直径小于2．5μm的固体质粒不可能通过机械碾磨方式形成。这两个气溶胶理论要点是深部金属矿生成气溶胶级别的质粒并进入气体向上迁移的基础。将气溶胶理论和技术应用于新疆金窝子隐伏金矿床找矿试验，结果表明，在210隐伏矿上方和矿体倾斜面上方有明显的金异常和金伴生元素异常，异常程度高，出露面积大。这一实验证明了通过提取吸附于地表土壤中的地气溶胶质粒，并分析其元素含量的气溶胶找矿方法，具有良好效果。

The application of the aerosol theory and technology to deep prospecting is the basic problem discussed in this paper. Miner- als from the depth can pass through the overburden of the ore deposit and reach the earth＇s surface. This process is mainly implemented by the transfer of the gas which carries plasmid upward from the depth. The basic condition of this transfer is that plasmid could be stab- ly suspended in the gas and then flow. The aerosol theory suggests that plasmids in the range of 0.1- 2.5 μm in diameter are the most stable ones in gas. Plasmids in the smaller or coarser sizes cannot be suspended in the gas for a long time; another point of the aerosol theory is that the solid plasmid which is less than 2.5 μm in diameter cannot be produced by mechanical milling. These two points of aerosol theory constitute the foundation of the view that the deep metal mine could generate aerosol levels plasmid, then the plasmid en- ters gas to transfer upwards. The aerosol theory and technology were applied in the prospecting test of the Jinwozi concealed gold deposit in Xinjiang. The results showed that,at the top of the No. 210 concealed deposit and above the inclined plane of the deposit,there is an obvious Au anomaly and a satellite elements anomaly, characterized by high anomaly contrast value and large exposed area. This experiment proved that the method of extracting the aerosol plasmid absorbed on the surface soil and then making element analysis has a good ore prospecting effect.