Role of calcimicrobes and microbial carbonates in the Late Carboniferous (Moscovian) mounds in southern Guizhou, South China
Role of calcimicrobes and microbial carbonates in the Late Carboniferous (Moscovian) mounds in southern Guizhou, South China
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贵州南部晚石炭世（莫斯科）土丘中钙微生物和微生物碳酸盐的作用
DOI：
10.1186/s42501-019-0041-7
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发表时间：
2019-07-31
影响因子：
2.9
通讯作者：
Gong, En-Pu
中科院分区：
文献类型：
--
作者：
Huang, Wen-Tao;Zhang, Yong-Li;Gong, En-Pu
各种微生物结构是中国南方贵州省南部后厂镇莫斯科晚期土丘的特征。土丘的主要成分是微生物结石，具有叠层结构、不规则的类鱼鳞状结构和皱纹结构。在土丘中发现的钙微生物包括Girvanella、Ortonella、Wetheredella 样、Palaeomicrocodium 样，以及一些存在于微生物结界石之间的沉积物、血栓形成结构和一些内碎屑中的有问题的钙微生物。微生物碳酸盐常见于土丘的基质和内部，包括血栓石结构、微叠层石、微生物类、oncoids、不规则结壳层、微生物垫碎片和微生物微晶。钙微生物和微生物碳酸盐在土丘的建造中发挥了重要作用：Girvanella 可能作为石灰泥的来源做出了贡献，形成了土丘并稳定了珊瑚框架；血栓垫可以捕获并固定沉积物和生物碎屑，有助于稳定基质和土堆石灰石；而且，微生物结块、凝结的泥晶和泥晶化的生物碎屑可以为后生动物（例如苔藓虫、Ivanovia）的结壳提供坚硬的基质。土丘中丰富的微生物结构表明，黔南莫斯科礁土丘中微生物活动广泛，表明微生物是研究区的主要土丘建造者。
Various microbial fabrics characterize late Moscovian mounds in Houchang Town, southern Guizhou, South China. The dominant components of the mounds are microbial boundstones with stromatolitic structures, irregular oncoid-like forms, and wrinkle structures. Calcimicrobes recognized in the mounds includeGirvanella,Ortonella,Wetheredella-like,Palaeomicrocodium-like, and some problematic calcimicrobes occurring in deposits between microbial boundstones, in thrombolitic textures, and in some intraclasts. Microbial carbonates are common in the substrate and interior of the mounds, including thrombolitic textures, microstromatolites, microbial ooids, oncoids, irregular encrusted layers, microbial mat debris, and microbial micrite. Calcimicrobes and microbial carbonates played an important role in the construction of the mounds:Girvanellamight have contributed as a source of lime mud that formed the mound and stabilized the coral frame; thrombolitic mats could trap and fix sediments and bioclasts, contributing to the stabilization of substrate and mound limestones; and, microbial boundstone, clotted micrite and micritized bioclast could provide a hard substrate for encrusting metazoans (e.g., bryozoans,Ivanovia). The abundant microbial fabrics in the mounds indicate that microbial activity was widespread in Moscovian reef mounds in southern Guizhou, and this suggests that microbial organisms were the primary mound builders in the study area.