δ 13C chemostratigraphy in the Lower–Middle Ordovician succession of Öland (Sweden) and the global significance of the MDICE

δ 13C chemostratigraphy in the Lower–Middle Ordovician succession of Öland (Sweden) and the global significance of the MDICE
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δland(瑞典)中下奥陶统的 13C 化学地层学和 MDICE 的全球意义

DOI:
10.1080/11035897.2014.901409
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发表时间:
2014
期刊:
GFF
影响因子:
1
通讯作者:
Joachimski
Joachimski
中科院分区:
地球科学4区
文献类型:
--
作者:
Calner;Lehnert;Dahlqvist;Joachimski

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基于Tingskullen岩心,我们首次对瑞典厄兰下-中奥陶统“正角砾岩灰岩”进行了连续的碳同位素地层学研究。极密集的Tremadocian和Floian阶段包括大的空白以及Ceratopyge海退事件和广泛的Evae海侵,伴随着δ 13 C记录的显著变化。大坪阶和达里维阶的特点是沉积速率低,沉积记录相对完整。共99个全岩样品进行了分析,从奥陶纪的继承(46米厚)的一部分的碳同位素地球化学。检测到的最显着的异常是中Darriwilian同位素碳偏移(MDICE),出现异常发达和完整的地区,从而形成了一个重要的代理洲际相关的继承。
Based on the Tingskullen drillcore, we present the first continuous carbon isotope stratigraphy from the Lower–Middle Ordovician “orthoceratite limestone” of Öland, Sweden. The extremely condensed Tremadocian and Floian stages include large gaps as well as the Ceratopyge Regressive Event and the widespread Evae transgression accompanied by prominent shifts in the δ13C record. The Dapingian and Darriwilian stages are characterised by low sedimentation rates and a relatively complete sedimentary record. A total of 99 whole-rock samples were analysed for carbon isotope geochemistry from the Ordovician part of the succession (46 m thick). The most striking anomaly detected is the middle Darriwilian isotope carbon excursion (MDICE) that appears unusually well developed and complete for the region, and thus forms an important proxy for intercontinental correlation of the succession.
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发表时间: 2001
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影响因子: 1.5
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