| 李建良.井中激发极化法在金牙金矿床普查中的应用[J].地质与勘探,2016,52(5):924-930 |
| 井中激发极化法在金牙金矿床普查中的应用 |
| Application of the down-hole IP method to a general survey in the Jinya gold deposit |
| 投稿时间：2015-01-12 修订日期：2016-08-19 |
| DOI： |
| 中文关键词: 金牙金矿床 微细粒浸染型金矿床 井中激发极化法 井中激电 激电测井 地-井方式 |
| 英文关键词: Jinya gold deposit, micro-disseminated gold deposit, Down-hole induced polarization method , IP well logging, ground-borehole survey mode |
| 基金项目:中国地质调查局老矿山和外围找矿项目(编号：1212011220708)资助 |
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| 摘要点击次数: 1902 |
| 全文下载次数: 84 |
| 中文摘要: |
| 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。 |
| 英文摘要: |
| In reconnaissance and exploration of metallic ores, the down-hole induced polarization (IP) method can aid to delineate the geometry of mineralized bodies found in the borehole, especially blind ones. Compared with the ground IP, the electrodes of power supply and measurement in this method are closer to ore bodies, thus having a deeper and broader survey scope. Besides, this technology has little interference in the hole and a higher ratio of signal to noise. The Jinya gold deposit is a typical micro-disseminated one. Because of the complexity of its spatial geometry, the exploration needs to predict the distribution and shape of the ore bodies. Taking the application of the down-hole IP to the ZK58811 borehole in this deposit as an example, this paper presents the work flow of the IP well logging in combination with the ground-borehole survey mode. Controlled by structure and lithology, this gold deposit has a large extension and highly varied forms of ore bodies, covered by thick Quaternary sediments. In such a unfavorable condition, the down-hole IP measurement has helped to infer structures and ore distribution around the borehole, providing evidence for subsequent drilling design, reducing risk of further exploration, and speeded up the survey. It proves that this method is feasible and effective in the survey of micro-disseminated gold deposits. |
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