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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Multidisciplinary tephrochronological correlation of marker events in the eastern Tyrrhenian Sea between 48 and 105 ka
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Multidisciplinary tephrochronological correlation of marker events in the eastern Tyrrhenian Sea between 48 and 105 ka

机译:第勒尼安海东部48至105 ka标记事件的多学科年代学相关性

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摘要

The basal portion (2.92-5.08 m from core top) of the CET1 core located in a bathyal area of the eastern Tyrrhenian Sea is the subject of a multidisciplinary investigation, encompassing tephrostratigraphy, quantitative analyses of planktonic foraminifera and calcareous nannofossil assemblages, and delta O-18 measurements, supported by a Ar-40/Ar-39 age determination. Calcareous nannofossil assemblages allowed the attribution of the analyzed sediments to the biozone MMN21a, and the succession spans from more than 48 to ca. 1051 a, although there are at least two stratigraphic gaps and minor resedimentation episodes. A paleoclimatic reconstruction obtained via delta O-18 and planktonic foraminifera data identifies several of the major climatic events that occurred in the investigated time span.
机译:位于第勒尼安海东部海床区域的CET1岩心的基部(距岩心顶部2.92-5.08 m)是多学科研究的主题,包括断层岩层照相术,浮游有孔虫和钙质纳米化石组合的定量分析,以及三角洲O -18次测量,并根据Ar-40 / Ar-39年龄确定。钙质纳米化石组合使被分析的沉积物归因于生物区MMN21a,演替的范围从48多个到大约200个。 1051a,尽管至少有两个地层学空白和轻微的再沉积事件。通过三角洲O-18和浮游有孔虫数据获得的古气候重建确定了在调查的时间跨度中发生的几个主要气候事件。

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