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Cretaceous in Sakhalin and Cretaceous events in North Pacific

萨哈林岛的白垩纪和北太平洋的白垩纪事件

基本信息

批准号：
09041114
负责人：
UEMURA K
金额：
$ 9.66万
依托单位：
National Science Museum
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09041114/
关键词：
Cretaceous Russia Sakhalin biostratigraphy Paleontology magnetostratigraphy Cretaceous events K T境界

项目摘要

The Cretaceous System in the southern part of Sakhalin, Russian Far East, was studied biostratigraphically, combined with matnetostratigraphic and carbon isotope stratigraphic surveys in 1997 and 1998. to establish a more precise bic- and chronostratigraphy for the Cretaceous System and to interpretate various aspects in biotic and physical evolution during the Cretaceous in the North Pacific regions, At the sections along the Naiba and Makarov rivers, we obtained the most reliable bio- and chronosratigraphic scheme in the North Pacific regions for the Santonian, Campanian and most part of Maastrichtian. The results, together with the middle and upper parts of the Cretaceous along the Ai River section, provide a sound basis for the biostratigraphic correlation based on marine invertebrates such as ammonites and inoceramids, and for our understandings of marine faunal characteristics in time and space. Carbon isotope changes from terrestrial organic carbon were examined to show globally recognized events and o prove its utility as a stratigraphic tool. Mineral composition and monazite ages in the Cretaceous sandstones indicate the same provenance as those in central Hokkaido. Although not conclusive, we collected additional data on the marine K/T boundary at the Naiba River section. The "Danian" part is still needed further investigations, and only its uppermost part is characterized by plant megafossils of Tertiary type.

结合1997年和1998年的基质地层学和碳同位素地层调查，对俄罗斯远东库页岛南部的白垩系进行了生物地层学研究，以建立更精确的白垩系生物地层和年代地层学，并解释北太平洋地区白垩纪生物和物理演化的各个方面。在奈巴河和马卡罗夫河沿岸河段，我们获得了北太平洋地区桑托尼阶、坎帕阶和马斯特里赫特阶大部分地区最可靠的生物和年代层图方案。该研究成果与艾河段白垩系中上部的研究结果，为基于菊石、菊石等海洋无脊椎动物的生物地层对比，以及认识海洋动物区系的时空特征提供了良好的基础。对陆地有机碳的碳同位素变化进行了检查，以显示全球公认的事件并证明其作为地层工具的实用性。白垩纪砂岩中的矿物成分和独居石年龄表明其来源与北海道中部的砂岩相同。虽然不是结论性的，但我们收集了奈场河段海洋 K/T 边界的额外数据。 “大阶”部分尚需进一步研究，仅其最上部有第三纪类型植物巨型化石特征。