| 梅超,魏向成,海连富,母彩霞.宁夏西华山地区簸箕掌铜金矿床地质特征及成矿地质条件分析[J].地质找矿论丛,2023,38(4):407-414 |
| 宁夏西华山地区簸箕掌铜金矿床地质特征及成矿地质条件分析 |
| Geological characteristics and metallogenic conditions of Bojizhang copper-gold deposits in Xihuashan area, Ningxia Hui Autonomous Region |
| 投稿时间：2023-01-19 修订日期：2023-07-31 |
| DOI：10.6053/j.issn.1001-1412.2023.04.001 |
| 中文关键词: 簸箕掌铜金矿床 地质特征 成矿地质条件 沉积-变质-热液改造型 西华山地区 宁夏 |
| 英文关键词:Bojizhang Cu-Au deposit geological characteristics metallogenic geological condition sedimentary-metamorphic -hydrothermally reworked deposit type Xihuashan area Ningxia |
| 基金项目:宁夏回族自治区自然科学基金项目(编号:2021AAC03447)、宁夏回族自治区重点研发计划项目(编号:2021BEG03003)联合资助。 |
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| 中文摘要: |
| 西华山地区是宁夏境内重要的金多金属矿成矿远景区之一,其中簸箕掌铜金矿是该地区目前已发现的规模最大的铜金矿床。本文从矿床地质特征入手,结合前人资料及研究成果,对簸箕掌铜金矿床地质特征进行了详细总结,并对成矿地质条件进行了分析。结果表明:簸箕掌铜金矿体主要由含铜金石墨化云母石英片岩、钠长岩脉及含铜碎裂石英脉构成,多沿地层节理、构造裂隙及石英脉分布,构造控矿明显;赋矿围岩为含石墨云母石英片岩、含石墨大理岩、钠长云母石英片岩;矿石类型以氧化矿石为主,呈块状、浸染状构造,围岩蚀变较弱,以褐铁矿化、黄铁矿化为主;西华山地区铜金矿的成矿作用受变质作用、构造及岩浆活动控制,矿床类型为沉积-变质-热液改造型铜金矿床。 |
| 英文摘要: |
| Xihuashan area is one of the crucial prospects of Au polymetallic deposits in Ningxia Hui Autonomous Region. The Bojizhang Cu-Au deposit is the largest deposit discovered in this area. Based on the previous data and results this article summarizes up detaily the geological characteristics and analyze the ore-forming condition of the deposit. The main ore bodies are mainly composed of Au, Cu-bearing graphitized mica quartz schist, albite dike and Cu-bearing fractured quartz veins, generally controlled by structure and distributed along the joints, tectonic fractures and quartz veins. The ore-hosting surrounding rock includes graphitic mica quartz schist, graphitic marble and albite- quartz-mica schist. The ore is characterirized by massive and disseminated structure and dominated by oxidized ore. The surrounding rock alteration is weak, including mainly limonitization and pyritization. Cu-Au mineralization in Xihuashan area is controlled by metamorphism of the strata, tectonic movement and magmatic activity. The Cu-Au mineralization are controlled by strata metamorphism, tectonic activity and magmatic activity and genetically the deposipts belong to sedimentary-metamorphic-hydrothermally reworked Cu-Au deposit. |
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