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地质论评  2011 

贵州台江革一黔东统杷榔组沉积环境初探

Keywords: 杷榔组,杷榔动物群,沉积环境,寒武系,贵州台江革一

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Abstract:

贵州台江革一杷榔组出露完整、富含化石,其中―上部层位产有类群组合多样的杷榔动物群,为杷榔动物群的一个重要产地。本文通过详细的野外观察,结合生物化石保存情况及岩石薄片的分析结果,对革一杷榔组沉积环境及其海平面变化规律进行了综合分析,认为革一杷榔组的沉积位于盐度正常、较深水的陆棚环境,生物生活环境多为氧化―弱氧化环境,富含化石的层位经历了快速沉积事件,整组的沉积由底向上海水经历了由深至浅的变化过程,但其间经历2次小的波动,水体变深后变浅,并出现还原―氧化界面的波动。

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