Abstract

Carbon and oxygen isotope compositions were determined in the pedogenic, sedimentary, and organogenic carbonates from Upper Permian (Vyatkian Stage) and Lower Triassic (Induan Stage) continental rocks in the northeastern Moscow Syneclise. Variations of δ¹⁸O (18.0 to 29.1‰ SMOW) and δ¹³C (‒8.8 to 0.7‰ PDB) in them could be provoked both by regional climatic fluctuations and by perturbation of the global carbon cycle at the Permian‒Triassic boundary. Decrease of δ¹⁸O in pedogenic carbonates at the top of the Vyatkian Stage was likely caused by cooling on the northeastern side of Pangea. The negative excursion of δ¹³C values at this stratigraphic level correlates with the analogous excursion recorded in marine carbonates of the Paleo- and Neotethys and corresponds to the end-Permian biotic event.

中文翻译：

---

俄罗斯东北板块二叠系—三叠纪岩石中大陆碳酸盐的同位素特征（δ13 C，δ18 O）：古气候和生物原因及化学地层学

摘要

在莫斯科Syneclise东北部的上二叠纪（Vyatkian阶段）和下三叠纪（Induan阶段）大陆岩石的成岩，沉积和有机成因碳酸盐中测定了碳和氧的同位素组成。的δ的变化¹⁸ O（18.0〜29.1‰SMOW）和δ ¹³ C（-8.8〜0.7‰PDB）中它们可以由两个区域气候波动，并通过在三叠纪边界全球碳循环的扰动引起。δ的减少¹⁸在Vyatkian阶段的顶O在成土碳酸盐可能是由冷却盘古上的东北侧造成的。δ的负偏移¹³在该地层水平的C值与古和新特提斯的海相碳酸盐中记录的类似偏移相关，并且对应于二叠纪末期的生物事件。