扬子陆块北缘六冲坪金矿方解石Sm-Nd等时线年龄及其地质意义

Resources Environment & Engineering(2021)

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Abstract
湖北省保康县六冲坪金矿点为鄂西黄陵背斜周缘沉积盖层中首次发现的微细浸染型金矿,对黄陵地区新类型金矿找矿突破具有重要指导意义.Sm-Nd同位素定年结果显示,成矿期6件方解石样品的147 Sm/144 Nd值介于0.0924~0.1336,143 Nd/144 Nd值介于0.511733~0.511840,Sm-Nd等时线年龄为(397±11)Ma,表明六冲坪金矿点形成于早—中泥盆世,是加里东晚期伸展背景下流体运移的产物,即黄陵背斜北缘可能存在一套加里东中—晚期区域性中低温热液成矿系列.
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