Abstract

The results of integrated study of the Turonian–Coniacian sediments from the Abinsky district (Northwest Caucasus), which are represented by a rhythmic terrigenous-carbonate sequence, are discussed. The use of microfacial, X-ray diffraction, isotope, and micropaleontological analyses allowed us to reveal important changes in abiotic and biotic evolution during this interval. The peculiarities of carbonate sedimentation, as well as changes in the composition of foraminiferal assemblages, helped to establish fluctuations in the relative sea level, whereas isotopic studies assisted in defining climatic fluctuations. During the periods of accumulation of carbonate and clayey material, the area was occupied by a relatively deep-water open-sea basin with normal salinity. In the background of high temperatures, cooling pulses are also recorded within the studied interval. The position of the Turonian–Coniacian boundary in the section is revised.

中文翻译：

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西北高加索土伦—科尼亚科沉积物的气候变化与沉积条件

摘要

讨论了以有节奏的陆源-碳酸盐序列为代表的阿宾斯基区（西北高加索）的土伦-科尼亚奇沉积物的综合研究结果。微面、X 射线衍射、同位素和微古生物学分析的使用使我们能够揭示在此期间非生物和生物进化的重要变化。碳酸盐沉积的特性以及有孔虫组合组成的变化有助于确定相对海平面的波动，而同位素研究有助于确定气候波动。在碳酸盐和粘土物质堆积期间，该地区被一个相对深水、盐度正常的外海盆地所占据。在高温的背景下，冷却脉冲也记录在研究的间隔内。修改了断面图隆-科尼亚西亚边界的位置。