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-  2010 

面积高度积分的面积依赖与空间分布特征

DOI: 10.11821/yj2010020010

Keywords: 面积高度积分,面积依赖,空间分布,构造活动,天山

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Abstract:

摘要: 面积高度积分作为揭示区域构造相对活动性的指标,其面积依赖和空间分布两大特性会影响到它对构造活动的解释。以北天山10条河流流域作为研究区域,研究表明,在不同集流面积阈值下,天山北麓流域次集水盆地的平均面积高度积分与平均面积、平均高差都具有负相关关系。受北天山褶皱逆断裂构造带的影响,流域面积高度积分值的分布与构造带走向相一致,上游山地型次集水盆地面积高度积分值大于中游山麓丘陵型次集水盆地面积高度积分,揭示了面积高度积分存在空间分布依赖的特性。在大小不同观测尺度下,构造活动和基岩岩性差异对面积高度积分有着不同的影响。在玛纳斯河流域中,以不同集流阈值提取的不同面积大小的次集水盆地与各年代地层以及活动构造做GIS叠加分析,可以发现当集流阈值小于9km2时,面积高度积分值受到岩性与构造的双重影响,而当集流阈值大于20km2时,面积高度积分值主要反映构造活动的影响。

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