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叠层石的生物成因是地质学家长期争论的焦点之一,以豫西寒武纪叠层石为研究对象,以偏光显微镜和扫描电镜为手段,发现了豫西寒武纪碳酸盐岩叠层石中赋存大量微生物化石,形态特征明显,为典型蓝细菌属的丝状葛万菌(Girvanella)和球状肾形菌(Renalcis),且具有明显的组合特征,分别表现为片状或席状组合、球状组合、蜂窝状组合和格网状组合等。研究发现叠层石微生物化石及其组合的分布状态与宏观形态和明暗纹层存在着十分密切的联系,并建立了豫西寒武纪叠层石微生物化石及其4类10种组合的沉积环境分布模式,同时表明,叠层石的生长环境特别是水动力条件是叠层石微生物化石组合保存及其分布状态的重要影响因素之一。
The biologic genesis of stratigraphic rocks is one of the focal points of long-standing controversy among geologists. Taking the Cambrian stratigraphic rocks in western Henan as the research object and using polarized light microscopy and scanning electron microscopy as the means, we found that the Cambrian Carbonates A large number of microbial fossils are found in the stratum, and their morphological features are obvious. They are Girvanella and Renalcis, typical of the genus Cyanobacteria and have obvious combination features, Combination, spherical combination, honeycomb combination and lattice combination. It is found that the distribution of microfossil assemblages and their assemblages are closely related to macroscopic morphology and bright and dark layers, and the depositional environment of the Cambrian stratiform fossil fossils and their 10 combinations Distribution model. It also shows that the growth environment of stratum, especially hydrodynamic conditions, is one of the important influencing factors for the preservation and distribution of stratum microbial assemblages.