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Clinoforms and Clinothems: Fundamental Elements of Basin Infill
  • E-ISSN: 1365-2117

Abstract

Abstract

Though clinothem geometry represents a key control on fluid flow in reservoir modelling, tracing clinothem boundaries accurately is commonly limited by the lack of sufficiently precise outcrop or subsurface data. This study shows that in basin systems with strongly heterogeneous compositional signatures, the combination of bulk‐sediment geochemistry and benthic foraminiferal distribution can help identify clinothem architecture and generate realistic models of 3D deltaic upbuilding and evolution. Middle‐late Holocene deposits in the Po Delta area form an aggradational to progradational parasequence set that reveals the complex interaction of W–E Po Delta progradation, S‐directed longshore currents (from Alpine rivers) and Apennines rivers supply. Unique catchment lithologies (ophiolite rocks and dolostones) were used to delineate basin‐wide geochemical markers of sediment provenance (Cr and Mg) and to assess distinctive detrital signatures. The geochemical characterization of cored intervals across different components of the sediment routing system enabled a direct linkage between clinothem growth, transport pathways and provenance mixing to be established. On the other hand, abrupt microfaunal variations at clinothem boundaries were observed to reflect the palaeoenvironmental response to sharp changes in sediment flux and fluvial influence. This study documents the ability of an integrated geochemical and palaeoecological approach to delineate three distinct sources (Po, Alps and Apennines) that contributed to coastal progradation and to outline the otherwise lithologically cryptic geometries of clinothems that using conventional sedimentological methods it would be virtually impossible to restore.

Basin Research © 2020 John Wiley & Sons Ltd, European Association of Geoscientists & Engineers and International Association of Sedimentologists © 2019 The Authors. Basin Research © 2019 John Wiley & Sons Ltd, European Association of Geoscientists & Engineers and International Association of Sedimentologists
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/content/journals/10.1111/bre.12360
2019-04-21
2024-04-26

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http://instance.metastore.ingenta.com/content/journals/10.1111/bre.12360
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Tracing clinothem geometry and sediment pathways in the prograding Holocene Po Delta system through integrated core stratigraphy
Basin Research 32, 206 (2020); https://doi.org/10.1111/bre.12360
/content/journals/10.1111/bre.12360
/content/journals/10.1111/bre.12360
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  • Article Type: Research Article
Keyword(s): benthic foraminifers; clinothem; delta; Holocene; Po Plain; progradation; sediment flux; sequence stratigraphy

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