| 刘召统,曾红红,杜玉梅,张依梦,苏鸽,张新新.地球化学异常识别及与断裂构造的耦合关系和找矿靶区优选[J].地质找矿论丛,2025,40(2):243-254 |
| 地球化学异常识别及与断裂构造的耦合关系和找矿靶区优选 |
| Geochemical anomaly identification and the coupling relationship with fault structures and optimistic selection of prospecting target |
| 投稿时间：2025-03-17 修订日期：2025-04-03 |
| DOI：10.6053/j.issn.1001-1412.2025.02.012 |
| 中文关键词: 水系沉积物 因子分析 异常信息提取 组合异常 |
| 英文关键词:stream sediment factor analysis anomaly information extraction composite anomaly |
| 基金项目:国家自然科学基金"五龙基金项目"(编号:41772071)资助。 |
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| 中文摘要: |
| 狼山构造带是我国北部著名的铜铅锌多金属成矿带之一。区内已发现多处多金属矿床,具有良好找矿潜力。本文根据狼山构造带内楚鲁庙地区水系沉积物地球化学数据,利用因子分析法提取4组因子,并计算因子得分绘制因子得分图,通过将其与趋势面分析法绘制的组合异常图进行对比研究。结果显示因子得分图可以良好地解释地质、成矿作用。F1、F2、F3、F4四组因子的因子得分高值区与区内断裂构造吻合良好。铜矿化主要与西侧NE走向断裂相关,金矿化主要与东侧近SN走向断裂相关。直接利用因子得分反映异常信息相较于组合异常等值线图更为清晰明确,且能良好地反映断裂构造信息。 |
| 英文摘要: |
| Langshan tectonic belt is one of the famous Cu-Pb-Zn polymetallic metallogenic belts in the north China. Many polymetallic deposits have been found in the belt. The belt has potential for further prospecting. In this paper, four groups of factors are extracted from the geochemical data of stream sediments in the Chulumiao area in the belt by factor analysis method. The factor score is calculated and the factor score map is drawn. A comparative study is carried out for the score map and trend surface analysis map. The result shows that the factor score map can well explain the geological and metallogenic processes. The high factor score areas of F1, F2, F3 and F4 factors are well coincided with the known faults in the region. Cu mineralization is mainly related to the NW fault on the west side of the region and Au mineralization to the nearly NS strike fault on the east side. Compared with the combined anomaly contour map, the direct use of factor scores can reflect clearer and better anomaly information, especially the structural information. |
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