| 张向文,刘攀峰,文美兰,朱超.甘肃敖包山地区地质、物化探异常特征及找矿前景分析[J].矿产勘查,2020,11(10):2210-2219 |
| 甘肃敖包山地区地质、物化探异常特征及找矿前景分析 |
| Geological,geophysical and geochemical characteristics and prospecting potential of the Aobaoshan region, Gansu Province |
| 投稿时间：2020-05-26 |
| DOI： |
| 中文关键词: 铜多金属矿 成矿地质条件 物化探异常 磁异常 找矿前景 敖包山地区 甘肃 |
| 英文关键词: copper polymetallic deposit,metallogenic geological environment, geophysical and geochemical anomaly,magnetic anomaly,prospecting potential, Aobaoshan region, Gansu Province |
| 基金项目:桂林理工大学科研启动基金(编号:GUTQDJJ2019166)和国家重点研发计划项目(编号:2016YFC0600603)联合资助。 |
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| 中文摘要: |
| 为了进一步探索敖包山地区铜多金属矿成矿潜力,本文开展1∶50000水系沉积物测量、1∶10000高精度磁测面积性物化探工作,圈定多个异常区,并结合地质特征、岩石地球化学特征综合分析认为:(1) 区内中元古界蓟县系平头山群地层属浅海相沉积,以还原沉积环境为主,下岩组内大理岩和大理岩夹板岩中Pb、Zn含量较高,可为区内成矿提供物质来源,东南部二长花岗岩的侵入可为成矿提供充分的热源；同时侵入的岩浆热液沿区内近东西向、北西向断裂运移,可使地层中Pb、Zn等元素活化、富集,再次成矿；(2)区内成矿元素以Pb、Zn、Ag、Cu等中低温元素为主,是寻找中低温热液铜铅锌多金属矿的有利地区,下一步工作重点应放在C5磁异常区,并对C3磁异常南北部已发现的矿点和破碎带加密控制,以期实现更大的找矿突破。 |
| 英文摘要: |
| Aobaoshan area is located in the eastern part of the Liuyuan-Tiancang fold belt of Beishan underground trough fold belt and the eastern extension of the north anticline of Shibanquan. Aobaoshan region belongs to the Fangshankou-Qijiaojingzi-Baishantang gold, copper, nickel, tungsten, manganese and vanadium-phosphorus- metallogenic belt, which has good metallogenic geological conditions and prospecting potentail. In order to explore the prospect of prospecting for copper polymetallic deposit in Aobaoshan region, the study carried out geophysical and chemical work systematically, and based on areal stream sediment measurement and high-precision magnetic measurement, delineated multiple abnormal areas, narrowed the prospecting scope, and provided direct prospecting information of multiple targets. The comprehensive analysis shows that:(1) the strata of Pingtou mountain group in the proterozoic jixian system belong to shallow Marine facies, mainly in reductive sedimentary environment. The marble in the lower rock formation have high content of Pb and Zn, which can provide material source for mineralization in this area. The intrusion of monzogranite in the southeast can provide sufficient heat source for mineralization. At the same time, the magmatic hydrothermal fluids formed by intrusive rocks migrated along the near east-west, nw-west and nw faults in the area, which could activate and enrich Pb, Zn and other elements in the strata, and lead to re-mineralization. (2) the metallogenic elements in this area are mainly Pb, Zn, Ag, Cu and other low and medium temperature elements, which are favorable areas for the search of low and medium temperature hydrothermal lead, zinc and copper polymetallic deposits. In order to achieve a greater breakthrough in prospecting, the next step should focus on the C5 magnetic anomaly area, and the ore deposits and fracture zones found in the south and north of C3 magnetic anomaly are encrypted and controlled. |
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