| 孟富军,龙兴跃,付奉甜,罗泽雄,尹近.云南普洱银子山金多金属矿床地质特征及矿床成因初探[J].矿产勘查,2021,12(8):1773-1784 |
| 云南普洱银子山金多金属矿床地质特征及矿床成因初探 |
| A preliminary study on the geological characteristics and genesis of the Yinzishan gold-polymetallic deposit in Pu’er, Yunnan Province |
| 投稿时间：2021-06-28 |
| DOI： |
| 中文关键词: 碲化物型金多金属矿床 矿床地质特征 矿床成因 云南普洱中图分类号: P624 文献标志码: A 文章编号: 1674-7801(2021)08-1773-12 |
| 英文关键词: telluride type gold deposit geological characteristics of ore deposits cause of deposit formation Pu’er Yunnan Province |
| 基金项目:本文受中国地质调查局整装勘查项目“云南省大平掌矿集区深部找矿预测”(DD2019057007)资助。 |
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| 中文摘要: |
| 云南普洱银子山金矿床是近年来新发现的碲化物型金多金属矿床，其位于滇西三江特提斯构造带，属于澜沧江断裂构造-火山岩带中南段的云县—景洪弧火山岩带。矿体主要赋存于志留系—泥盆系大凹子组中，与矿区发育的火山岩关系密切，产于硅化英安岩、硅化凝灰岩、蚀变火山角砾-凝灰岩内，其中矿石矿物形态为细脉状硫化物和团块状碲化物的金品位较高；矿体形态总体具有脉状、透镜状、分支复合状等特征；矿石具有明显的交代残余结构、填隙结构，具有脉状、角砾状构造，无明显的沉积构造特征；自蚀变带中心向两侧具绢云岩化(含金)→硫化物(含铜、锌、银，伴生金)→青磐岩化的蚀变分带模式；成矿具有多期多阶段性；岩矿石的微量元素、稀土元素的组成特征表明成矿流体总体呈还原性质，成矿物质部分可能来源于含矿火山岩。金主要以碲金矿、斜方碲金矿的形式存在，少量呈自然金形式。金矿化主要的成矿阶段(黄铁矿 -碲化物阶段)的温度为 150~280 ℃之间。矿床成矿年代可能为晚于(420.8±1.6) Ma。以上现象表明，银子山金多金属矿床为产于火山机构中的浅成低温火山热液碲化物型 |
| 英文摘要: |
| The Yinzishan gold -polymetallic deposit in Pu’er, Yunnan is a telluride type gold deposit discovered in recent years. It is located in the Sanjiang Tethys tectonic belt in western Yunnan and belongs to the Yunxian-Jinghong arc volcanic rock belt of the middle and southern Lancang River fault-volcanic rock belt. The ore bodies mainly occur in the Silurian-Devonian Da’ao Formation and are closely related to the volcanic rocks developed in the mining area. The gold grade of the ore is higher in the form of .ne vein sul.de and massive telluride. The shape of the ore body is veins, lenticulars and branches； The ore has obviously metasomatic residual structure, interstitial structure, veined and brecciated structure, and no obvious sedimentary structure. From the center to the two sides of the self-alteration zone, there is an alteration zone pattern of sericularization (gold-bearing) → sul.de (copper, zinc, silver associated gold) → propylitization； Mineralization has multiple stages； The composition characteristics of trace elements and rare earth elements of rock indicate that the ore-forming .uids are generally reductive and some of the ore-forming materials may come from ore-bearing volcanic rocks. The gold mainly exists in the form of tellurium gold deposit and rhombic tellurium gold deposit, with a small amount in the form of natural gold. The temperature of the main mineralization stage of gold mineralization (pyrite-telluride stage) may be between 150 ℃ and 280 ℃. The metallogenic age of the deposit is probably 420.8±1.6 Ma later. The above phenomena indicate that The Yinshan gold deposit is a shallow low temperature volcanic hydrothermal telluride type gold deposit produced in volcanic mechanism. |
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