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本文在介绍一种新的土壤汞量测量找矿方法的同时,着重用大量的实测数据阐明汞在460铀矿床上的分布特征。汞在该矿床上部“黑矿”中的平均含量高达11430ppb,最高达193800ppb,而一般岩石中的汞含量只有数十至数百个ppb。通过对铀矿石及其主岩中的汞的热释谱分析,发现释汞主峰温度在350℃以上的中温、高温相态汞与铀矿化关系密切。铀矿床上部土壤汞晕规模大(550×350m~2),平均含量可达563ppb,最高达6080ppb,平均衬度16,最高达174。汞含量随着采样深度的加深而升高。在矿床外围测出了相似的汞晕,并进行了成矿预测。上述成果已用于生产。
In this paper, we introduce a new method of soil mercury measurement and prospecting, and focus on a large number of measured data to clarify the distribution of mercury in the 460 uranium deposit. Mercury in the upper part of the ore “black ore” average content of up to 11430ppb, up to 193,800ppb, while the general rock mercury content of only tens to hundreds of ppb. According to the pyrogram analysis of mercury in uranium ore and its host rocks, it is found that the intermediate-temperature and high-temperature phase mercury with the main peak temperature of mercury release is close to uranium mineralization. Ammonium halogens in the upper part of uranium deposits are large (550 × 350m ~ 2) with the average content up to 563ppb and up to 6080ppb with an average contrast of 16 and a maximum of 174. Mercury content increased with depth of sampling. A similar halo of mercury was detected at the periphery of the deposit and a metallogenic prediction was made. The above results have been used for production.