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右江盆地中三叠统浊积岩系的物源和沉积构造背景分析

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Keywords: 右江盆地,浊积岩,物源,构造背景

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Abstract:

右江沉积盆地在大地构造位置上被称为右江印支褶皱带。浊积岩碎屑组分特征、重矿物组分特征和古流向等特征显示赋矿的中三叠统浊积岩系的主要物源区为盆地周围的“越北古陆”、“江南古陆”和东边地区包括钦防海西褶皱带在内的“云开古陆”。浊积岩的稀土元素特征、微量元素特征和常量元素特征一致显示其沉积构造背景介于大陆岛弧和活动大陆边缘之间的过渡构造环境。

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