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Evaluation of controlling factors on facies distribution and evolution in an arid continental environment: an example from the Rotliegend of the NE German Basin

By
H. Rieke
H. Rieke
Pan Terra Geo consultants B. V., Veerpolder 5, 2361 KX Warmond, The Netherlands
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T. McCann
T. McCann
Geologisches Institut, Rheinische Friedrich-Wilhelms-Universität, Nußallee 8,53115 Bonn, Germany,
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C. M. Krawczyk
C. M. Krawczyk
GeoForschungsZentrum, Telegrafenberg, 14473 Potsdam, Germany
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J. F. W. Negendank
J. F. W. Negendank
GeoForschungsZentrum, Telegrafenberg, 14473 Potsdam, Germany
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Published:
January 01, 2003

Abstract

About 3 km of core material from 14 wells together with additional data from several hundred wells across the NE German Basin (NEGB), have been investigated in order to reconstruct the facies architecture and the evolution of the Upper Rotliegend II. Special attention has also been given to the verification of various controlling factors and their influence on sedimentation in an arid continental environment. The facies architecture within the logged profiles comprises five main environments, namely braided plain, ephemeral stream floodplain, sand flat, mudflat and playa lake. The evolution can be subdivided into four distinct basin-wide correlatable periods — Parchim, Mirow, Dethlingen and Hannover formations — with each of them being characterized by a specific basin geometry and interplay of controlling factors. The deposition of the basal Parchim Formation largely took place within a tectonically created basin, whereas the facies evolution displayed an initial less-arid climatic period and later shift to an arid climate. The succeeding Mirow Formation marks the beginning of thermally induced basin subsidence. However, sedimentation itself clearly reflects a period in which the climate was relatively less arid. The overlying Dethlingen Formation was largely controlled by the increasing thermal subsidence of the basin, leading to broad extension towards the south and east. Internally, the strata can show the effects of climatic variability, depending on their position within the basin. The uppermost Hannover Formation was the product of ongoing basin subsidence, a reduction in sediment supply and an increasingly peneplaned topography. In summary, evolution of the Upper Rotliegend II within the NEGB reveals a variety of factors which have a significant influence on sedimentation, such as climate variations, the creation rate and amount of accommodation space, wind direction, sediment budget and source area lithology. An understanding of how these various factors interlink in controlling basin infill is of great significance in understanding the complex depositional history of arid continental successions.

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Geological Society, London, Special Publications

Tracing Tectonic Deformation Using the Sedimentary Record

T. McCann
T. McCann
Geologisches Institut, Bonn, Germany
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A. Saintot
A. Saintot
Instituut voor Aardwetenschappen, Vrije Universiteit, The Netherlands
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Geological Society of London
Volume
208
ISBN electronic:
9781862394568
Publication date:
January 01, 2003

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