井中激发极化法在金牙金矿床普查中的应用

发布时间：2018-06-07 17:52

本文选题：金牙金矿床 + 微细粒浸染型金矿床　；参考：《地质与勘探》2016年05期

【摘要】：在金属矿普查和勘探中,井中激发极化法能帮助判断钻孔中已知矿化体或矿体的空间展布,特别是盲矿体。和地面激发极化法相比,该方法供电电极或测量电极接近矿体,加大了勘探深度和范围,且井中干扰较小,数据的信噪比高。金牙金矿床是典型的微细粒浸染型金矿床。由于该金矿床的空间展布的复杂性,在勘探过程中需要预测矿体的展布与形态。文章以金牙金矿床那元矿段ZK58811孔的井中激电为例,对激电测井与地-井方式方位测量的方法技术及资料解释作了说明。该矿床矿体受构造与岩性双重控制,矿床延伸较大,矿体形态复杂多变,地表覆盖着较厚的第四系沉积。通过井中激发极化法测量,较准确地推断了构造、矿体在钻孔四周的展布,为后续钻探设计提供依据,减少了探矿风险,加快了矿床勘查,证明井中激电在微细粒浸染型金矿勘查中的应用是可行的和有效的。
[Abstract]:In the survey and exploration of metal deposits, the method of induced polarization in wells can help to determine the spatial distribution of known orebodies or orebodies in boreholes, especially blind orebodies. Compared with the ground induced polarization method, the power supply electrode or the measuring electrode is close to the orebody, which increases the exploration depth and scope, and the interference in the well is small, and the signal-to-noise ratio of the data is high. The gold-tooth gold deposit is a typical microfine disseminated gold deposit. Because of the complexity of the spatial distribution of the gold deposit, it is necessary to predict the distribution and shape of the orebody in the exploration process. In this paper, the method, technique and data interpretation of geoelectric logging and geo-well azimuth measurement in the wells of ZK58811 hole in the Nayuan section of the gold-tooth gold deposit are described. The ore body is controlled by both structure and lithology. The ore body is extended and complex and changeable, and the surface is covered with thick Quaternary deposits. By means of in-well induced polarization survey, the structure and distribution of ore bodies around the boreholes are inferred more accurately, which provides the basis for the design of subsequent drilling, reduces the risk of prospecting, and speeds up the exploration of ore deposits. It is proved that the application of in-well IP in the exploration of microfine disseminated gold deposits is feasible and effective.
【作者单位】：中国冶金地质总局广西地质勘查院;
【基金】：中国地质调查局老矿山和外围找矿项目(编号:1212011220708)资助
【分类号】：P631.324;P618.51

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