新疆卡拉麦里碰撞带南缘上泥盆统磨拉石的发现及其意义

wf(2017)

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Abstract
新疆卡拉麦里碰撞带演化研究对泥盆系地层和沉积几乎无人涉及.上泥盆统克安库都克组粗碎屑岩系产先鳞木,粗碎屑岩砾石大小不均、分选差、磨圆度以次圆状为主,具砂、砾岩韵律结构和含炭质泥岩、砾岩韵律结构,砾岩厚度较大,应为近源磨拉石堆积.上泥盆统克安库都克组磨拉石的发现,表明碰撞时间应在晚泥盆世,而不是目前普遍认为的早石炭世.
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