The application of well-to-ground TEM method to uranium exploration
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摘要: 地—井TEM是近年来引入的一种先进的井中物探测量方法,该方法通过研究井中感应二次场在空间和时间上的变化特征,可以达到研究钻孔周围电性分布结构的目的,从而发现井旁、井底盲矿,或推断已见矿体的空间分布与延伸方向。文中对地—井TEM的静态及动态响应特征进行了说明,重点对响应的前期和中期数据进行处理,形成随深度变化的电场变化强度图,并通过对江西荷上地区ZK39?7、广东长排地区ZK8?2两个钻孔的研究,表明地—井TEM测量不仅可以反映钻孔附近地段的构造破碎及蚀变等信息,而且对铀矿化信息也有一定反映,为进一步钻探施工提供了较为准确的依据。Abstract: The well?to?ground TEM Is an advanced borehole geophysical measurement method introduced in recent years. The method is characterized by sensing changes in the secondary field in space and time. With this method, researchers can achieve the purpose of discussing the borehole electrical nature and to discover the bottom hole blind ore or infer the spatial distribution and extension direction of the orebody. In this paper, the authors analyzed the well?to?ground TEM static and dynamic response characteristics and, through the research on well?to?ground TEM measurements in Heshang ZK39?7 in Jiangxi and Changpai ZK8?2 in Guangdong, found that this meth?od can not only reflect lots of broken structure and alteration information around the borehole but also detect the information on the ura?nium mineralization. The results obtained by the authors provide a more accurate basis for further drilling construction.
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Key words:
- well-to-ground TEM /
- uranium prospecting /
- deep prospecting /
- borehole data
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