| 展茂征,尹延超,袁化朋,韩亮,刘同庆,国立峰.山东省莒南县马家峪地区金银矿地质特征及找矿前景分析[J].矿产勘查,2025,16(S2):15-21 |
| 山东省莒南县马家峪地区金银矿地质特征及找矿前景分析 |
| Geological characteristics and prospecting prospects analysis of gold and silver deposits in Majiayu area，Junan County，Shandong Province |
| 投稿时间：2025-09-30 |
| DOI：10.20008/j.kckc.2025s2003 |
| 中文关键词: 金银矿 地质特征 矿床成因 矿体特征 前景分析 |
| 英文关键词: gold-silver deposit geological characteristics deposit genesis orebody characteristics prospect analysis |
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| 中文摘要: |
| 马家峪地区金银异常呈北东向展布，与区域北东向大断裂相吻合，断裂构造为矿液的迁移和元素的沉淀 富集提供了有利的赋存空间，成矿热液在构造有利部位成矿，矿床成因类型为中低温热液充填型金、银 矿。通过研究发现银矿体 1个、金银矿体 1个， Ⅰ号矿体赋存于断裂蚀变破碎带内，受其构造控制，矿化蚀 变有黄铁矿化、黄铁绢英岩化和绿泥石化等。 Ⅱ号矿体赋存于石英脉与下部围岩接触带内，矿化蚀变有 硅化、糜棱岩化、高岭土化、绢英岩化、褐铁矿化、黄铁矿化等。矿石矿物主要为自然金、自然银、黄铁矿、 赤铁矿、透明矿物等。区内金化探异常与金、银矿(化)点吻合较好，物探异常具有低阻高极化的特征，与 构造蚀变带内具硅化、黄铁矿化等相吻合，通过物化探异常圈定找矿靶区，进行异常查证，为本区寻找金 银矿床指明了方向。 |
| 英文摘要: |
| The gold and silver anomalies in the Majiayu area extend in a northeast direction，aligning with the regional northeast-trending major fault. The fault structure provides favorable space for the migration of ore fluidsand the precipitation and enrichment of elements. The ore-forming hydrothermal fluids deposit at favorable structural locations，and the genesis of the deposits is classified as mesothermal and epithermal filling-type gold and silver deposits. Through research，one silver orebody and one gold-silver orebody were discovered. Orebody Ioccurs within the faulted altered fracture zone and is controlled by its structure. The mineralization alterations include pyritization，pyrite-sericite-quartz alteration，and chloritization. Orebody II occurs within the contact zone between quartz veins and the underlying surrounding rocks，with mineralization alterations such as silicification， mylonitization，kaolinization，sericite-quartz alteration，limonitization，and pyritization. The ore minerals mainly consist of native gold，native silver，pyrite，hematite，and transparent minerals. The gold geochemical explorationanomalies in the area align well with the gold and silver mineralization(or alteration)points. The geophysical exploration anomalies exhibit low resistivity and high polarization characteristics，which are consistent with silicification and pyritization within the structural alteration zones. By delineating prospecting target areas based ongeophysical and geochemical exploration anomalies and conducting anomaly verification，the direction for search. ing for gold and silver deposits in this area has been clarified. |
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