| 王孝国.郭家沟大型隐伏铅锌矿床的发现与意义[J].地质与勘探,2014,50(5):932-937 |
| 郭家沟大型隐伏铅锌矿床的发现与意义 |
| The Discovery and Significance of the Large Concealed Pb-Zn Deposit in Guo Jia-gou Ore Area |
| 投稿时间：2012-05-18 |
| DOI： |
| 中文关键词: 隐伏 铅锌矿床 找矿标志 沉积-改造型 |
| 英文关键词: concealed, Pb-Zn Deposit, ore markers, sedimentary transformation type |
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| 中文摘要: |
| 郭家沟大型隐伏铅锌矿床的发现历时约十年时间，矿床位于西成铅锌矿带(田)的东段，属于洛坝铅锌矿床的东延，在地表无任何矿化显示的情况下，首先，通过分析地质成矿环境，确定找矿靶区；然后使用激发极化发现异常，并采用音频大地电磁法研究深部含矿层位、控矿构造形态；最后通过研究区域构造、围岩蚀变、含矿地层及其岩性组合特征得出：郭家沟矿区含矿带地层就挟持于F1与F5断裂之间，形成一个呈东西向展布的舌状地质构造体，是寻找本类型铅锌矿的直接标志；矿体集中分布在中泥盆统安家岔组焦沟层（D2a2-2b）的千枚岩与（D2a2-2a）的厚层结晶灰岩、生物碎屑灰岩、硅化灰岩接触带的硅化灰岩一侧；另外，硅化、铁白云石化、黄铁矿化、碳酸盐化（网脉状）、碎裂角砾岩等蚀变是找矿的重要标志。通过矿床的发现经过、矿床地质特征及物探异常特征研究，指出了该区的找矿方向；郭家沟大型隐伏铅锌矿床的发现拓宽了西成铅锌矿带（田）找矿空间。 |
| 英文摘要: |
| The discovery of the large concealed Pb-Zn deposit in Guo Jia-gou ore area has taken about ten yeas. It is in the east of the Xicheng lead-zinc mine belt, belongs to Luo Ba deposits. Without surface mineralization, firstly analysed the geology metallogenic environment, and then found geophysical anomalies by induced-polarization method, and took audio magnetotelluric sounding method (AMT) to analyse the ore-bearing horizon, ore-controlling structure. And at last, based on the regional structure, wall rock alteration, ore-bearing strata and lithology , it is concluded that the Guo Jia-gou ore belt is formed between the F1 and F5 faults, as a linguoid geological structure in east-west direction. It is the direct ore markers. The ores are concentrating distributed in phyllite of Middle Devonian, AnJiaCha series (D2a2-2b) and thick crystalline limestone, bioclastic limestone, meuliere side of the meuliere contact zones of D2a2-2a strata. Beside that, silicification, iron dolomitization, pyritization, carbonatation (mesh-vein structure), chipped breccia, and so on, are important ore markers. All the above work helps to direct the prospecting direction, and enlarge the prospecting space of the Xicheng lead-zinc mine belt. |
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