苏玲;陈留勤;

• 1:中国地质大学地球科学与资源学院

摘要(Abstract)：

叠层石和臼齿构造是前寒武纪较为引人注目的两种沉积现象。叠层石作为微生物碳酸盐岩的典型代表,在前寒武纪由于对叠层石的形成缺乏直接的微生物证据而成为一个"前寒武纪谜";臼齿构造复杂的宏观形态和奇特的微亮晶方解石填充物以及对其成因机制的持续争论而成为又一个"前寒武纪谜"。最新研究表明,叠层石形态种数量在元古宙达到繁盛的顶峰之后开始衰减,而仅产出于前寒武纪地层记录中的臼齿构造似乎总是以较高的丰度呈幕式发育于叠层石的衰减事件之后,在空间上臼齿构造多产出于比叠层石更深的水体环境。叠层石的衰减和臼齿构造的幕式发育历史可能主要与环境因素发生重大变化有关,而后生动物的竞争不是直接原因。

关键词(KeyWords)： 叠层石衰减事件;臼齿构造作用幕;微生物碳酸盐岩;前寒武纪

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(4047206549802012)

作者(Author): 苏玲;陈留勤;

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