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首页> 外文期刊>Zeitschrift der Deutschen Gesellschaft fur Geowissenschaften: ZDGG >Chemostratigraphy and stratigraphic distribution of keeled planktonic foraminifera in the Cenomanian of the North German Basin
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Chemostratigraphy and stratigraphic distribution of keeled planktonic foraminifera in the Cenomanian of the North German Basin

机译：北德国盆地Cenomanian的庞德氏浮游对塞米尼拉的化疗和地层分布

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摘要

The record of keeled planktonic foraminifera during the Cenomanian in boreal epicontinental basins is discontinuous.Micropalaeontologic and bulk carbonate carbon and oxygen isotope investigations from two cores in the centre of the North German Basin (NGB,Wunstorf, Lower Saxony) showed keeled praeglobotruncanids and rotaliporids to exclusively appear during three stratigraphic intervals of varying duration in the lower and middle Cenomanian.Our new highresolution carbon isotope (δ~(13)C_(carb)) composite curve shows that keeled foraminifera are absent during the Mid-Cenomanian Event (MCE) I.In the aftermath of MCE I, keeled planktonic foraminifera are present throughout.The data are correlated to previously published sequence stratigraphic models for the NGB.The presence/absence of keeled planktonic foraminifera in the epicontinental NGB is believed to be controlled by sea level and according environmental conditions in the epicontinental basin.
机译：北部陆表盆地赛诺曼纪期间，龙骨状浮游有孔虫的记录是不连续的。对德国北部盆地中心的两个岩芯（NGB、Wunstorf、下萨克森州）进行的微体古生物学和块状碳酸盐碳氧同位素调查显示，在赛诺曼纪中下部的三个不同持续时间的地层间隔内，只出现了龙骨状的Praeglobotroncanids和Rotaliproids。我们的新的高分辨率碳同位素（δ~（13）C_（carb））复合曲线表明，在中赛诺曼事件（MCE）I期间，没有龙骨状有孔虫。在MCE I之后，整个过程中都存在龙骨状浮游有孔虫。这些数据与之前发布的NGB层序地层模型进行了对比。陆表NGB中存在/不存在龙骨状浮游有孔虫被认为是受海平面和陆表盆地的环境条件控制的。

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