S-A多重分形法在Au地球化学异常识别中的应用——以埃塞俄比亚中北部为例  

Application of S-A multifractal method in Au geochemical anomaly identification:A case study of middle-north Ethiopia

作　　者：白洋 何宇 向文帅[2] 魏凌霄 郑雄伟 张元培 吴颖 赵辞 Bai Yang;He Yu;Xiang Wenshuai;Wei Lingxiao;Zheng Xiongwei;Zhang Yuanpei;Wu Ying;Zhao Ci(Hubei Institute of Geophysical Exploration,Wuhan,Hubei 430056;Wuhan Centre of China Geological Survey,China Geological Survey,Wuhan,Hubei 430205)

机构地区：[1]湖北省地质局地球物理勘探大队,湖北武汉430056 [2]中国地质调查局武汉地质调查中心,湖北武汉430205

出　　处：《资源环境与工程》2024年第4期400-406,共7页Resources Environment & Engineering

基　　金：中国地质调查局项目“北部非洲大型铜金资源基地评价”(DD20190443)。

摘　　要：地球化学数据的分形/多重分形模型研究是应用地球化学的热点研究领域。选取能谱—面积(S-A)多重分形模型来对埃塞俄比亚中北部地区的Au地球化学异常进行识别,结果表明S-A多重分形模型可以有效分解复杂地球化学场,突出局部矿致异常,并在已知重点金矿集区外围识别出多个有利Au异常区,有效提高矿致异常的识别度。因此,在实际工作中可利用S-A多重分形模型准确识别潜在的矿致异常,为进一步的金矿勘查工作提供有效的地球化学依据。The study of fractal/multifractal model of geochemical data is a hot research field of applied geochemistry.The energy spectrum-area(S-A)multifractal model is selected to identify Au geochemical anomalies in the north-central region of Ethiopia.The results show that S-A multifractal model can effectively decompose the complex geochemical field,highlight local ore-induced anomalies,and identify multiple favorable gold anomaly areas in the periphery of known key gold concentration areas,effectively improving the recognition of ore-induced anomalies.Therefore,the S-A multifractal model can be used to accurately identify potential ore-induced anomalies in practical work,providing an effective geochemical basis for further gold exploration.

关 键 词：地球化学 异常识别 能谱—面积方法 金矿床 埃塞俄比亚 

分 类 号：P618.51[天文地球—矿床学] P632[天文地球—地质学]