Detached lowstand deposits illustrated through seismic data, lithology and clay mineralogy: an example from the Lower Miocene of Denmark

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Abstract

On seismic panels from southwestern Jutland a specific seismic facies, characterized by high amplitude, steeply dipping reflectors is recognized within a background of low-angle seismic reflection pattern. The prograding interval, interpreted as a prograding delta, records a distinct shift in facies during the deposition of offshore to shallow marine shelf deposits and is therefore interpreted as belonging to a lowstand systems tract. Correlative outcrops of nearshore sandy sediments in eastern Jutland also show a marked facies change characterized by a 1 m thick gravel layer sandwiched between fine-grained marine sands. This gravel is interpreted as having been deposited under subaerial conditions in a fluvial environment that was coeval with the lowstand delta in southwest Jutland. Clay mineral studies support this interpretation of the gravel layer. The marine sediments are characterized by having a smectite clay mineral association; in contrast, the gravel layer contains no smectite, but has a clay mineral suite that is characteristic of rivers draining the hinterland east of the study area.

Original languageEnglish
Title of host publicationSequence stratigraphy - concepts and applications
Subtitle of host publicationProceedings of the Norwegian Petroleum Society Conference, 6 - 8 September 1995, Stavanger, Norway
EditorsFelix M. Gradstein, K.O. Sandvik, N.J. Milton
PublisherElsevier
Pages413-421
Number of pages9
ISBN (Print)0444827803
Publication statusPublished - 1998
EventNorwegian Petroleum Society Conference 1995 - Stavanger, Norway
Duration: 6 Sept 19958 Sept 1995

Publication series

SeriesNorwegian Petroleum Society Special Publications
Volume8

Conference

ConferenceNorwegian Petroleum Society Conference 1995
Country/TerritoryNorway
CityStavanger
Period6/09/958/09/95

Programme Area

  • Programme Area 3: Energy Resources

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