豫西鲁山寒武系馒头组微生物岩旋回及其演化

发布时间：2018-02-22 11:38

本文关键词： 核形石凝块石水动力条件微生物岩旋回馒头组三段寒武系鲁山河南　出处：《微体古生物学报》2017年02期 　论文类型：期刊论文

【摘要】：河南鲁山地区寒武系第三统馒头组三段上部碳酸盐岩中发育了大量微生物岩,包括3种类型核形石和2种类型凝块石,其内发现了大量钙化的蓝细菌化石Girvanella(葛万菌)和Epiphyton(附枝菌)。根据凝块石-核形石—鲕粒的演化关系,可识别出5个微生物岩旋回。凝块石总是位于微生物岩旋回的底部,形成于潮下低能环境中;核形石位于旋回的中部,形成于潮下低-高能周期性变化的环境中;鲕粒灰岩出现在旋回的顶部,发育于持续搅动的潮下高能环境中。水动力条件的逐渐增强是微生物岩类型及其旋回演化的主控因素。
[Abstract]:A large number of microbe rocks have been developed in the upper carbonate rocks of the third member of the third member of the Cambrian formation in Lushan area, Henan Province, including three types of kernelitic rocks and two types of agglomerates. A large number of calcified cyanobacterial fossils Girvanella and Epiphyton have been found in it. Based on the evolutionary relationship between clot, nucleate and oolitic, five microbe cycles can be identified. The condensate is always located at the bottom of the microbial cycle. Formed in a subtidal low-energy environment, nucleated in the middle of the cycle, formed in a subtidal low-high-energy cyclic environment, oolitic limestone appears at the top of the cycle, The hydrodynamic condition is the main controlling factor of microbe rock type and its cycle evolution.
【作者单位】：河南理工大学资源环境学院;
【基金】：国家自然科学基金项目(批准号:41472083)资助~~
【分类号】：P534.41;P588.248

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