| 吴建亮.江西万年银金矿床Ⅶ号脉原生晕特征与深部预测[J].地质与勘探,2013,49(5):836-845 |
| 江西万年银金矿床Ⅶ号脉原生晕特征与深部预测 |
| Characteristics of Primary Haloes of the Ⅶ Vein in the Wannian Silver-Gold Deposit, Jiangxi Province and Deep Orebody Prediction |
| 投稿时间：2013-01-24 修订日期：2013-04-20 |
| DOI： |
| 中文关键词: 深部预测 原生晕 万年银金矿 江西 |
| 英文关键词: metallogenic prognosis, primary halo, Wannian sliver-gold deposit, Jiangxi Province |
| 基金项目:万年矿业有限公司“江西万年县虎家尖银、金矿区深部及外围找矿综合研究及成矿预测”资助 |
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| 中文摘要: |
| [摘 要]文中主要对江西万年银金矿床Ⅶ号脉原生晕特征作了系统论述。因子分析结果表明，F1因子代表成矿期石英-多金属硫化物阶段银矿化，F2因子代表细粒硫化物阶段的银、金矿化，反映出该矿区具有一期金矿化，两期银矿化特点。矿区Ⅶ号脉由南西向北东发育三个原生晕带，其中Ⅱ号原生晕带表现出明显的反分带特征，由浅到深其轴向分带序列为Sn-Au-Cu-Mn-B-Mo-Ni-F
-Ag-Cr-Hg-Pb-Zn-W-Bi，其尾部出现前尾晕共存，地球化学参数呈“降-升-降-升”振荡波动变化，均反映其深部有盲矿体的存在。对矿化规律研究表明，Ⅶ号矿体赋存于Ⅶ号构造破碎带内并被其严格限制，厚矿体多呈不规则瘤状以雁列式近等距排布，往NE向深部侧伏延伸，侧伏角约45°~55°之间，厚矿体中心间距离大约在180~220m之间。厚矿体以及Ag、Au品位与厚度乘积的高值区在矿区中部46~56线区段-235m深部以下均有明显延伸，为有利的构造及成矿指示标志。在此基础上建立了矿区深部矿体预测立体模型，为矿区深部地质工作部署提供有效依据。 |
| 英文摘要: |
| Abstract: This paper describes the geochemical characteristics of primary haloes of the VII vein in the Wannian silver-gold deposit, Jiangxi Province. The factor analysis results show that F1 stands for Ag mineralization in the quartz-multimetal sulfide stage, F2 stands for Ag and Au mineralization in the fine particles sulfide stage, which reflects this deposit has a feature of one period of Au mineralization and two periods of Ag mineralization. The Ⅶ vein hosts 3 primary halo belts from the southwest to the northeast. The 2nd primary halo belt exhibits an obvious unusual zoning sequence (from high to low): Sn-Au-Cu-Mn-B-Mo-Ni-F-Ag-Cr-Hg-Pb-Zn-W-Bi, where the trail halo and the front halo are superimposed in its end part. Geochemical parameters with a variation of “down-up-down-up” also indicate the existence of deep orebodies underneath. Metallogeny shows the Ⅶ# ore body occurs in the Ⅶ structural fracture belt and is strictly controlled by it .The lateral extension of the thick orebody to the deep part is in NE direction in a form of en echelon. The thick orebody and the higher product of Ag-Au grade and the thickness of ore body both have an evident extension in the area blow the -235 m level between the 46th-56th exploration lines as favorable prospecting indicators. Based on these data, a three-dimensional deep orebody prediction model is established to provide evidence for the further exploration work. |
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