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地质论评  2003 

新疆卡拉麦里蛇绿岩带中硅质岩的放射虫化石

Keywords: 新疆卡拉麦里蛇绿岩带硅质岩放射虫化石

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Abstract:

新疆卡拉麦里构造带在奇台县南明水地区可划分为三个岩石一构造单元:①北带,由中泥盆世复理石组成;②南带,由中泥盆世―早石炭世沉积岩―火山质碎屑岩组成;③蛇绿岩带。三者之间均为断裂接触。蛇绿岩套上部单元的红色硅质岩中发现丰富的放射虫化石,经鉴定,其时代确定为晚泥盆世法门期一早石炭世杜内期,代表卡拉麦里蛇绿岩形成的晚期年龄。

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