Abstract

The results of measurements of the electrical properties of rocks and induced polarization surveying are analyzed for three gold-ore deposits including the Bamskoe, Berezitovoe, and Pokrovka in the Upper Priamurye region. The spatial correlation is shown between mineralization zones and contrasting resistivity boundaries mapped within the gold-ore fields. The assumption is validated that the blocks of high-resistivity rocks have minimal permeability and therefore they were able to act as screens affecting the hydrodynamic features of the hydrothermal system at the stages of deposit formation and at the stages of mineralization formation. This makes such geoelectrical boundaries an important element for exploration, which should be accounted for when interpreting electric prospecting data. The induced polarization survey establishes a diverse interpretation of the polarizability anomalies within the gold-ore fields and a lack of correlation between ranges of increased induced polarization values and gold-ore mineralization. Methods for evaluating polarizability anomalies are proposed.

中文翻译：

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普里阿穆里地区上层金矿床的地电特征

摘要

分析了Priamurye上游地区Bamskoe，Berezitovoe和Pokrovka的三个金矿床的岩石电特性测量结果和感应极化测量结果。在矿化带和金矿田内绘制的对比电阻率边界之间显示了空间相关性。证实了这样的假设，即高电阻率岩石块具有最小的渗透率，因此它们能够在沉积物形成阶段和矿化形成阶段充当影响热液系统水动力特征的屏障。这使得这样的地电边界成为勘探的重要元素，在解释电勘探数据时应予以考虑。感应极化勘测建立了金矿田内极化率异常的多种解释，并且感应极化值增加的范围与金矿石矿化之间缺乏相关性。提出了评估极化率异常的方法。