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地球学报  2010 

多重分形模型在区域地球化学异常分析中的应用探讨

DOI: 10.3975/cagsb.2010.04.15

Keywords: 分形模型,含量-面积法,含量-求和法,负异常上限

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Abstract:

地球化学异常分析是地球化学勘查中的重要环节,对有效发现异常至关重要。但是,在以往研究中,研究者们多重视对成矿元素及其伴生元素正异常的研究,忽视对由元素贫化而形成的负异常的研究。元素的负异常在地球化学勘查中具有与正异常同等重要的作用,以往没有重视负异常的原因之一是缺乏有效发现此类异常的方法,尤其是确定负异常上限的方法。本文以北山地区1:20万峡东幅水系沉积物测量Ba数据为基础,探讨了应用多重分形模型确定贫化元素负异常上限的可行性。结果发现,利用含量-面积法、含量-求和法确定的Ba的异常上限,有效圈定了辉铜山矿床产出地段Ba的负异常,取得了预期成果。

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