鞍本地区南芬BIF铁矿控矿因素、找矿标志及深部预测

    Ore-controlling factors, prospecting indicators and deep prediction of Nanfen BIF iron deposit in Anshan-Benxi area

    • 摘要: 南芬BIF铁矿是鞍山-本溪地区重要的铁矿床之一,目前对该矿床的勘查评价正在加速进行. 为进一步查明该区成矿规律和找矿潜力,指导深部勘查找矿工作,在前人研究的基础上,基于已知的地质、地球物理勘查和室内综合研究成果,全面分析总结了区域性深大断裂、大地构造环境、原岩建造类型、地质构造、岩浆活动等5个主要控矿因素,明确了层位层序、构造、地球物理特征等找矿标志. 结合矿体特征、航磁、地磁异常特征和区域重力异常特征,初步建立了南芬铁矿地质-地球物理找矿模型,并对研究区的找矿方向和深部矿体预测进行研究,推测南芬铁矿矿体延伸可达1 600~2 700 m,指示该地区深部存在较好的找矿远景.

       

      Abstract: The Nanfen BIF iron deposit represents one of the significant iron deposits in Anshan-Benxi area, where the exploration and evaluation efforts are being accelerated currently. Based on previous studies and available geological and geophysical survey data, as well as integrated laboratory research, this study aims to further clarify the metallogenic patterns and prospecting potential of the area, thereby providing guidance for deep exploration. A comprehensive analysis has been conducted, identifying five main ore-controlling factors: regional deep-seated faults, tectonic setting, protolith formation types, geological structures, and magmatic activities. Key prospecting indicators, including stratigraphic sequence, structural features, and geophysical characteristics, have also been determined. By integrating orebody characteristics, aeromagnetic and ground magnetic anomalies, and regional gravity anomalies, a preliminary geological-geophysical prospecting model for Nanfen iron deposit has been established. Furthermore, the study outlines prospective exploration directions and provides predictions of deep-seated orebodies, suggesting that the Nanfen iron orebody may extend to depths of 1 600-2 700 m, with significant potential for deep exploration in the area.

       

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