Nyhuis, C. J., Riley, D. and Kalasinska, A. (2016). Thin section petrography and chemostratigraphy: Integrated evaluation of an upper Mississippian mudstone dominated succession from the southern Netherlands. Neth. J. Geosci., 95 (1). S. 3 - 23. CAMBRIDGE: CAMBRIDGE UNIV PRESS. ISSN 1573-9708

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Abstract

Sedimentological data acquired by thin section petrography is a rich source of information to better understand and interpret depositional environments that are dominated by fine-grained deposits. This study provides an evaluation of the sedimentological and geochemical changes recorded over Upper Visean to Lower Namurian successions preserved in a core section from a well drilled in the southern part of the Netherlands. Facies analysis and the recognition of microfacies associations allow detailed interpretations of depositional environments. Interpretation of additional geochemical data acquired by portable X-ray fluorescence analyses has resulted in a chemostratigraphic zonation for the core section. The zonation reflects stratigraphic changes in the mineralogy of the sedimentary successions. Integration of the microfacies associations and the chemostratigraphic zonation has led to the identification of three so-called depositional zones, which show the development of depositional settings from Late Visean to Early Namurian times. Depositional Zone 1 consists of fine-grained turbiditic limestones and mudstones deposited in a distal carbonate ramp setting during Latest Visean times. The overlying Depositional Zone 2 corresponds to the Geverik Member (Lower Namurian) and is particularly heterogeneous in geochemical and lithological terms: the zone reflects a complex interplay between different parameters such as sediment source, transport mechanisms and oxygen content that are assumed to be governed by fluctuating sea levels and changing depositional environments (from basinal to shallow marine settings). Sandy lenticular mudstones are predominant in the lower part of Depositional Zone 2 and show that sedimentation was via erosive bedload, whilst the common fossiliferous mudstones present within the upper part of the same zone yield evidence for increased endobenthic activity in dysoxic conditions. The successions assigned to Depositional Zone 3 (= Epen Formation - Namurian) are the products of cyclic sedimentation of a terrestrial sourced delta.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Nyhuis, C. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Riley, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kalasinska, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-281957
DOI: 10.1017/njg.2015.25
Journal or Publication Title: Neth. J. Geosci.
Volume: 95
Number: 1
Page Range: S. 3 - 23
Date: 2016
Publisher: CAMBRIDGE UNIV PRESS
Place of Publication: CAMBRIDGE
ISSN: 1573-9708
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
RHENISH MOUNTAINS GERMANY; OCEANIC ANOXIC EVENT; BLACK SHALES; LOWER TOARCIAN; FACIES; BASIN; GEOCHEMISTRY; BELGIUM; LITHOFACIES; DEPOSITIONMultiple languages
Geosciences, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/28195

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