| 张志强,申鹏良,孙靖宇,王彦兵,张朋,郑文宝,吴传勇,何广宇,刘华,焦剑妮,何红霞,魏苹.内蒙古布敦乌拉银矿床地质特征及矿床成因探讨[J].矿产勘查,2025,16(S1):35-45 |
| 内蒙古布敦乌拉银矿床地质特征及矿床成因探讨 |
| Geological characteristics and genesis of budunwula silver deposit，Inner Mongolia |
| 投稿时间：2025-05-23 |
| DOI：10.20008/j.kckc.2025S1005 |
| 中文关键词: 银矿床 地质特征 中硫化型 布敦乌拉 |
| 英文关键词: silver deposit geological features intermediate-sulfidation Budunwula |
| 基金项目:本文受内蒙古自治区西乌珠穆沁旗布敦乌拉矿区银矿资源储量核实项目(XYDK[2022]-02)资助。 |
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| 中文摘要: |
| 大兴安岭南段 Ag-Pb-Zn-Cu-Sn-Mo多金属成矿带是中国北方最重要的多金属成矿带之一，区内分布有大量的多金属矿床。布敦乌拉矿床是近年新取得重大找矿突破的大型银矿床，提交银金属量 11114 t。本文通过矿床地质、地球化学等特征研究，划分了成矿阶段，总结了控矿因素与成矿作用，探讨了矿床成因类型。矿体主要赋存于次火山岩相蚀变流纹(斑)岩中，绢云母化 -伊利石化 -黄铁矿化蚀变与银矿化密切相关，成矿时代属早白垩世。矿床规模是仅次于该多金属成矿带上双尖子山银铅锌矿的国内第二大独立银矿床，具有规模大、厚度大、埋藏浅、品位高的特点。笔者勘查、研究认为:矿床成因类型为与陆相火山 -次火山岩有关的中硫化(IS)型浅成低温热液矿床。 |
| 英文摘要: |
| The southern Great Xing′an Range Ag-Pb-Zn-Cu-Sn-Mo polymetallic metallogenic belt representsone of the most significant polymetallic metallogenic belts in northern China，hosting numerous polymetal deposits. The Budunwula deposit，a recently discovered large-scale silver deposit with major exploration breakthroughs，has reported silver reserves of 11，114 t. Based on the study of deposit geology and geochemical characteristics，this paper divides the mineralization stages，summarizes the ore-controlling factors and mineralization processes，and discusses the genetic type of the deposit. Ore bodies in the mining area primarily occur within altered rhyolite(porphyry)of subvolcanic facies，where silver mineralization shows close association with sericitization-illitization-pyritization alterations. The metallogenic epoch dates back to the Early Cretaceous. As the second-largest independent silver deposit in China(second only to the Shuangjianzishan Ag-Pb-Zn deposit within the same metal. logenic belt)，it exhibits characteristics of large scale，great thickness，shallow burial，and high grade. Based on exploration and research by the authors，the deposit is classified genetically as an intermediate sulfidation(IS) epithermal deposit related to continental volcanics bvolcanic activities. |
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