罗蒙诺索夫海脊（北纬 83°）岩石碎屑的含量和成分：古环境变化的迹象

IF 0.7 4区地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Doklady Earth Sciences Pub Date : 2024-05-30 DOI:10.1134/s1028334x24602074

E. A. Popova, V. A. Bogin, S. A. Malyshev, K. V. Filchuk, A. S. Makarov, V. D. Kaminsky

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引用次数: 0

摘要

摘要本文介绍了北极和南极研究所 Severnyi Polyus 41 号考察队在北冰洋罗蒙诺索夫海脊（北纬 83 度）用箱式取样器对沉积物中岩石碎屑的数量、物质和形态组成进行研究的结果。根据岩性描述，从每个不同的岩层中采样了大小≥ 1 厘米的碎屑。年龄模型是通过与以前年代的岩心进行岩层学关联建立的。东坡和山顶的碎屑岩含量明显高于西坡，这是因为西坡在脱冰期高峰之后沉积速度较快。岩石成分从碳酸盐岩到火成岩的变化以及随着时间推移圆形度的增加表明，在 MIS 1 中欧亚物质的输入较多。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Content and Composition of Rock Debris at Lomonosov Ridge (83° N): Indication of Palaeoenvironmental Changes

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Content and Composition of Rock Debris at Lomonosov Ridge (83° N): Indication of Palaeoenvironmental Changes

Abstract

The results of studying the quantitative, material, and morphometric composition of rock debris in sediments sampled by a box-corer on Lomonosov Ridge (83° N), Arctic Ocean, during the Severnyi Polyus 41 expedition of the Arctic and Antarctic Research Institute are presented. Clasts ≥ 1 cm in size were sampled from each distinguished layer according to the lithological description. The age model was created by the lithostratigraphic correlation with previously dated cores. The content of clasts on the eastern slope and summit is significantly higher than on the western slope, which is explained by the higher sedimentation rate on the western slope after the deglaciation peak. The change in the rock composition from carbonate to igneous and the increase in roundness with time indicate a higher input of Eurasian material in MIS 1.

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来源期刊

Doklady Earth Sciences 地学-地球科学综合

CiteScore

1.40

自引率

22.20%

发文量

138

审稿时长

3-6 weeks

期刊介绍： Doklady Earth Sciences is a journal that publishes new research in Earth science of great significance. Initially the journal was a forum of the Russian Academy of Science and published only best contributions from Russia. Now the journal welcomes submissions from any country in the English or Russian language. Every manuscript must be recommended by Russian or foreign members of the Russian Academy of Sciences.