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首页> 外文期刊>Zeitschrift der Deutschen Gesellschaft fur Geowissenschaften: ZDGG >New age for Paleogene/Neogene clastics at the northern termination of the Upper Rhine Graben (Hesse, Germany)
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New age for Paleogene/Neogene clastics at the northern termination of the Upper Rhine Graben (Hesse, Germany)

机译：古代/新生疏水层的新时代在莱茵河上莱茵河（Hesse，Germany）的北终止

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摘要

This study is about Paleogene/Neogene elastics in the Wetterau at the northern termination of the Upper Rhine Graben (Hesse, Germany). There was common consent that they are comparable in age with the Calcareous Tertiary of the Mainz Basin (uppermost Chattian to Lower Burdigalian). In the southern part of the Wetterau, this assumption is proofed biostratigraphically. In the northern Wetterau, similar elastics are almost fossil-free and dating is very difficult. These elastics belong to the Rockenberg Formation with an assumed age of Lower Chattian to Lower Burdigalian. Especially in the northern Wetterau, there was agreement that they are only of uppermost Chattian to Lower Burdigalian age, locally overlain by Pliocene gravels. Euhedral zircons, detected in a newly recognised altered trachytic tuff intercalated in these gravels, were U-Pb dated. The dating yielded an age of 26.2 ± 0.2 Ma. The zircons show nearly perfect faces with almost no signs of abrasion. This leads to the conclusion, that there was no transport after the sedimentation of volcanic ash in an alluvial environment. Consequently, the gravels are Middle Chattian in age, which is much older than previously thought. The underlying sands may be of uppermost Rupelian to Lower Chattian age, indicated by older Tertiary sediments below them and the sparse fossil record within. They are in that case comparable in age with the Marly Tertiary of the Mainz Basin (Middle Rupelian to Upper Chattian).
机译：本研究在上莱茵河（Hesse，Germany）的北部终止的Wetterau中是关于古常/ Neogene Elastics。有常见的同意，他们在年龄与Mainz盆地的钙质大学（最高南部较低的大迪利大帝）的年龄相当。在韦特劳的南部，这种假设是证明生物数据的。在北部韦特劳，类似的弹性物质几乎无化，约会很难。这些弹性品属于Rockenberg形成，其中较低的南部的假定年龄降低到较低的大帝国。特别是在北方韦特劳，有一致认为，他们只有最高的南最高的南部的南部的大多数年龄，局部骨髓砾石覆盖。在这些砾石中嵌入的新公认的改变的颅骨凝灰岩中检测到的Euhedral锆石是U-Pb。该约会产生了26.2±0.2 mA的年龄。锆石几乎没有磨损的迹象表明了几乎完美的面孔。这导致了结论，在冲积环境中的火山灰沉降后没有运输。因此，砾石是年龄的中间南切安，比以前思想大得多。底层沙子可能是最高的卢比人，以降低削田时代，由较旧的第三级沉积物表明，在它们下方和稀疏化石记录中。他们在那种情况下与Mainz盆地的Marly Tertiary（中卢利安到上部切片）相当。

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