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地质通报  2003 

辽南新元古代营城子组臼齿灰岩的沉积环境

, PP. 419-425

Keywords: 臼齿灰岩微层序沉积环境震旦系辽南

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Abstract:

臼齿(Molar―Toom)灰岩是发育于中新元古代碳酸盐台地的一种特殊灰岩类型。辽东半岛南部大连地区震旦系营城子组中部臼齿灰岩十分发育,野外观测、室内薄片以及比较沉积学研究表明,臼齿灰岩的出现与环境密切相关。通过米级旋回研究发现,该岩相段以发育浅水碳酸盐岩米级旋回层序为主,臼齿构造主要产出在微旋回中下部的中薄层泥晶灰岩和粉屑灰岩中,形成环境为潮下浅水环境。

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