The Ura uplift section in southern Middle Siberia is one of the key sections for testing of climatic changes and evolutionary events of the Ediacaran, as well as the development of the stratigraphic framework for this period. The low latitude glacial deposits, positive δ¹³C anomalies and the Ediacaran Complex Acanthomorph-dominated Palynoflora are observed in the Dal‘naya Taiga Group succession, which occurs in the lower part of this section. The “Shuram-Wonoka” negative δ¹³C anomaly is recorded in the overlying Zhuya Group. We selected three horizons of highly Sr-enriched limestones in the Dal'nyaya Taiga Group for Pb-Pb isochron dating. The obtained ages (613 ± 56 Ma 581 ± 16 Ma and 575 ± 20 Ma) are the first geochronological confirmation of the Ediacaran age of the Dal‘nyaya Taiga postglacial deposits and provide a restriction for the timing of δ¹³C anomalies and diversification of acanthomorph acritarchs in Siberia.

中西伯利亚南部乌拉隆起剖面是检验埃迪卡拉纪气候变化和演化事件以及该时期地层格架发展的关键剖面之一。低纬度冰川沉积、δ ¹³ C正异常和以埃迪卡拉纪复合棘形为主的孢粉植物群出现在该剖面下部的达纳亚针叶林群演替中。“Shuram-Wonoka”负δ ¹³C异常记录在上覆珠牙群中。我们在 Dal'nyaya Taiga Group 中选择了三个高度富含 Sr 的石灰岩层，用于 Pb-Pb 等时线测年。获得的年龄（613 ± 56 Ma 581 ± 16 Ma 和 575 ± 20 Ma）是 Dal'nyaya Taiga 冰后沉积物埃迪卡拉纪的首次地质年代学确认，并为 δ ¹³ C 异常的时间和多样化提供了限制acanthomorph acritarchs 在西伯利亚。