Paleontological Journal ( IF 0.7 ) Pub Date : 2022-04-13 , DOI: 10.1134/s0031030122010105 N. V. Sennikov 1, 2 , N. V. Novozhilova 1, 2 , R. A. Khabibulina 1 , V. A. Luchinina 1
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Abstract
The study of Silurian sediments in the central part of the Altai Mountains (Gorny Altai) by limestone dissolution has revealed two groups of spherical objects; large microspheres 90–120 µm and small nanofossils (nanospheres) 5–18 µm in diameter. Their double-layered walls are composed of standard-sized siderite microcrystals replaced by goethite. The Altai microspheres have a low Ca content (<0.5 wt %) so cannot be interpreted as calcispheres. The Altai Silurian microspheres and nanofossils (nanospheres) are tentatively attributed to biomineralized remains of loricae (shell-like envelopes) of various euglenoid alga generations.
中文翻译：
阿尔泰山脉志留纪的微球：形态、化学成分、生物矿化和成因
摘要
通过石灰岩溶解对阿尔泰山脉（Gorny Altai）中部志留系沉积物的研究揭示了两组球形物体；直径为 90–120 µm 的大微球和直径为 5–18 µm 的小纳米化石（纳米球）。它们的双层壁由标准尺寸的菱铁矿微晶组成，被针铁矿取代。阿尔泰微球的钙含量低（<0.5 wt%），因此不能解释为钙球。阿尔泰志留纪微球和纳米化石（纳米球）暂时归因于各种眼虫藻世代的 loricae（壳状包膜）的生物矿化遗骸。
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