首页> 外文期刊>Science in China. Series D, Earth sciences >Middle and Late Devonian microbial carbonates, reefs and mounds in Guilin, South China and their sequence stratigraphic, paleoenvironmental and paleoclimatic significance
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Middle and Late Devonian microbial carbonates, reefs and mounds in Guilin, South China and their sequence stratigraphic, paleoenvironmental and paleoclimatic significance

机译:华南桂林中泥盆纪晚期碳酸盐岩,礁石和丘陵及其层序,古环境和古气候意义

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Microbial precipitation of calcium carbonate has played a major role in formation of carbonate platforms since the Archean. Also, microbial carbonates and biologically induced cement are important contributors to reef framework volume and rigidity in carbonate platform systems during times of significant environmental change including transgressive events in platform environments and the recovery interval following the major biotic crisis. The stratigraphic distribution of different types of microbial carbonates appears to vary within the sequence stratigraphic framework. Reefs and mounds within the Late Devonian carbonate platforms in Guilin, South China are formed primarily by calcimicrobes and biologically induced cement, representing the microbe-dominated and characteristic carbonate buildups within a reefal ecosystem that nearly all reef-building metazoans were absent after the Frasnian/Famennian biotic crisis. Microbial community and microbialite seem to be linked with specific palaeoenvironment and pa-laeoclimate, suggesting that they could be used as indicators of environmental change and biotic events.
机译:自从太古宙以来,碳酸钙的微生物沉淀在碳酸盐平台的形成中起了重要作用。同样,在重大环境变化时期,包括平台环境中的海侵事件和重大生物危机之后的恢复间隔,微生物碳酸盐和生物诱导的水泥是碳酸盐平台系统中礁石骨架体积和刚性的重要贡献者。在层序地层框架内,不同类型的微生物碳酸盐的地层分布似乎有所不同。华南桂林晚泥盆纪碳酸盐台地内的礁石和丘陵主要由钙化微生物和生物诱导的水泥形成,代表了礁系生态系统中以微生物为主导的特征性碳酸盐堆积,在弗拉斯尼亚人/之后几乎没有礁石建造后生动物。法属生物危机。微生物群落和微生物微生物似乎与特定的古环境和古气候有关,表明它们可以用作环境变化和生物事件的指标。

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