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Carbonate Neoformations on Modern Buildings and Engineering Structures in Tyumen City, Russia: Structural Features and Development Factors

机译:俄罗斯秋明市现代建筑和工程结构上的碳酸盐岩新变形:结构特征和发展因素

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The paper presents the results of studying the development of calcite neoformations on the surfaces of modern buildings within the city of Tyumen. The objects of the study were carbonate crusts and stalactite-like bodies formed on the surfaces of five representative buildings in the city center. Research methods included visual diagnostics, optical microscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy, confocal laser scanning microscopy and semi-quantitative determination of the mineral composition by X-ray diffraction analysis. The results of the study show that calcite is the main component of all carbonate crusts, while other minerals were found in small quantities. The microscopic studies revealed the differences in morphology of crusts developing on horizontal and vertical surfaces. The mycelium of fungi (presumably of the Penicillium group), represented by filamentous and often hollow hyphae covered with calcite, as well as relics of bacterial colonies were found in all studied samples. It was noted that the mycelium forms the structural frame of carbonate crusts and stalactites. Studies have shown that the prokaryotic–eukaryotic communities are responsible for the high rate of the urban speleothem growth and play the main role in calcite precipitation at the initial stages of their development.
机译:本文介绍了研究秋明市现代建筑表面方解石新形态发展的结果。研究的对象是在市中心五座代表性建筑物的表面形成的碳酸盐结壳和钟乳石状物体。研究方法包括视觉诊断,光学显微镜,具有能量色散X射线光谱的扫描电子显微镜,共聚焦激光扫描显微镜以及通过X射线衍射分析对矿物成分进行半定量测定。研究结果表明,方解石是所有碳酸盐地壳的主要成分,而其他矿物的数量很少。显微镜研究揭示了在水平和垂直表面上形成的硬皮形态的差异。在所有研究样品中均发现了真菌丝菌体(可能是青霉菌类),以丝状且通常为空心的菌丝覆盖着方解石为代表,以及细菌菌落的遗迹。注意到菌丝体形成了碳酸盐结壳和钟乳石的结构框架。研究表明,原核生物-真核生物群落是城市蛇肢藻生长的高速率原因,并在其发展的初始阶段在方解石沉淀中起主要作用。

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