Reference Section of the Campanian Stage of the Southwestern Crimea: Problems of Substage Subdivision and Global Correlation

IF 1 4区地球科学 Q3 GEOLOGY

Stratigraphy and Geological Correlation Pub Date : 2024-03-20 DOI:10.1134/s0869593824020023

E. Yu. Baraboshkin, A. Yu. Guzhikov, G. N. Aleksandrova, V. V. Akinin, I. P. Ryabov, M. A. Ustinova, N. A. Rtischev, V. S. Vishnevskaya

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Abstract—

Stratigraphy of Campanian deposits in the stratotype of the Kudrinskaya Formation in the Southwestern Crimea is revised. For the first time, integrated sedimentological, biostratigraphic (ichnofossils, cephalopods, inoceramids, foraminifers, dinocysts, nannoplankton, gilianelles), isotope-geochemical, paleo- and petromagnetic characteristics of the section were obtained. The boundary of the lower and upper Campanian is substantiated and confirmed by U–Pb dating of zircons from the well-known bentonite (kil) clay bed in the interval of 77–80 Ma. It is proposed to accept the Campanian Substage boundary of the General Stratigraphic Chart (for bipartite stage subdivision) at the top of the Chron C33r, located near the δ¹³C isotopic excursion “MCaE” – Mid-Campanian Event, near the first occurrence of the benthic foraminifer Brotzenella monterelensis and a number of other traditional biomarkers.

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克里米亚西南部坎帕尼亚期参考剖面：子期划分和全球相关性问题

摘要--对克里米亚西南部库德林斯卡亚地层中的钟乳石沉积的地层学进行了修订。首次获得了该区段的沉积学、生物地层学（化石、头足类、原生动物、有孔虫、二囊虫、浮游动物、吉利莲）、同位素地球化学、古地磁和岩石地磁的综合特征。从著名的膨润土（千枚岩）粘土层中提取的锆石的 U-Pb 测定年代为 77-80 Ma，从而证实并确认了下、上元古界的界线。建议在年代 C33r 的顶部，即δ13C 同位素偏移 "MCaE"--中元古代事件附近，底栖有孔虫 Brotzenella monterelensis 和其他一些传统生物标志物的首次出现附近，接受《一般地层图》（用于双分期划分）的营盘亚期边界。

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来源期刊

Stratigraphy and Geological Correlation 地学-地质学

CiteScore

1.80

自引率

30.00%

发文量

审稿时长

>12 weeks

期刊介绍： Stratigraphy and Geological Correlation is the only journal that provides comprehensive coverage of the fundamental and applied aspects of stratigraphy and the correlation of geologic events and processes in time and space. Articles are based on the results of multidisciplinary studies and are for researchers, university professors, students, and geologists interested in stratigraphy and the chronological features of the world’s geological record.