| 刘学亮,李红飞,胡俊,翟旭,王坤,刘和军.内蒙古凉城大西湾地区土壤地球化学特征及找矿潜力分析[J].地质找矿论丛,2025,40(3):397-407 |
| 内蒙古凉城大西湾地区土壤地球化学特征及找矿潜力分析 |
| Soil Geochemical Characteristics and Analysis of Mineral Exploration Potential of Daxiwan Area in Liangcheng County, Inner Mongolia |
| 投稿时间：2025-05-08 修订日期：2025-08-18 |
| DOI：10.6053/j.issn.1001-1412.2025.03.014 |
| 中文关键词: 地球化学 土壤 地球化学特征 综合异常 找矿标志 大西湾地区 |
| 英文关键词:geochemical soil geochemical characteristic comprehensive anomalies prospecting indicator Daxiwan area |
| 基金项目:内蒙古自治区地质勘查基金管理中心项目“内蒙古自治区凉城县大西湾金银多金属矿预查”(编号：21-1-KC34)资助。 |
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| 中文摘要: |
| 内蒙古凉城县大西湾地区属于中低山丘陵区，地表出露较差，地质找矿标志不明显，在找矿过程中土壤地球化学测量方法对发现矿体起到了重要作用。运用浓集系数、变异系数等理论和方法，对研究区内Ag、Au、Bi、Pb、Sb、Sn、W、Zn共8种元素的测量数据进行统计分析，显示研究区Au、Bi、Sb、Sn有较好的成矿潜力。利用新疆金维软件(GeoIPAS)对研究区数据进行聚类分析，按照元素组合规律，在研究区内共圈定了6处综合异常。其中AP2、AP3、AP4异常分布面积大，异常元素套合较好，浓度分带明显。通过异常查证发现综合异常AP2、AP3位于研究区的北东向断裂构造蚀变带中，利用槽探、钻探工作对AP2、AP3、AP4异常进行验证，发现金矿(化)体就赋存于该构造中。共圈定了3个金矿(化)体，分别为：Au①平均含量为0.25 g/t，Au②平均含量为0.16 g/t，Au③平均含量为0.23 g/t；2个金矿体，分别为：AuⅢ平均品位为0.5 g/t，AuⅤ平均品位为0.6 g/t。通过总结研究区矿床的地质、地球化学特征，提出了土壤地球化学测量在中低山丘陵区使用的有效性，为本区域的找矿工作提供了借鉴，也为研究区下一步的勘查工作打下良好的基础。 |
| 英文摘要: |
| The Daxiwan area, located in the low-medium mountainous hilly region of Liangcheng County, Inner Mongolia, exhibits poor surface exposure and indistinct geological prospecting indicators. During mineral exploration, soil geochemical survey methods played a key role in identifying ore bodies. Statistical analysis of eight elements (Ag, Au, Bi, Pb, Sb, Sn, W, Zn) was conducted using enrichment coefficients and variation coefficients, revealing significant metallogenic potential for Au, Bi, Sb, and Sn in the study area. Cluster analysis of geochemical data using GeoIPAS software delineated six composite anomalies based on elemental associations. Among these, anomalies AP2、AP3 and AP4 displayed large spatial distributions, substantial elemental overlap, and distinct concentration zoning. Field verification confirmed that anomalies AP2 and AP3 are situated within NE-trending fracture alteration zones. Trenching work in these anomalies identified gold mineralization hosted within these structures. The study area were delineated three gold-mineralized bodies namely Au① with an average grade of 0.25 g/t, Au② with an average grade of 0.16 g/t, Au③ with an average grade of 0.23 g/t; and two gold ore bodies namely AuⅢ with an average grade of 0.5 g/t, AuⅤ with an average grade of 0.6 g/t. By synthesizing the geological and geochemical characteristics of the deposits, this study demonstrates the effectiveness of soil geochemical surveys in low- to medium-mountainous terrains. The findings provide a valuable reference for mineral exploration in all regions. It also provides a solid foundation for future exploration work. |
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