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dc.contributor.authorGrundvåg, Sten-Andreas
dc.contributor.authorMarin Restrepo, Dora Luz
dc.contributor.authorKairanov, Bereke
dc.contributor.authorSliwinska, Kasia
dc.contributor.authorNøhr-Hansen, Henrik
dc.contributor.authorJelbye, Mads
dc.contributor.authorEscalona Varela, Alejandro
dc.contributor.authorOlaussen, Snorre
dc.date.accessioned2018-11-13T14:46:17Z
dc.date.available2018-11-13T14:46:17Z
dc.date.embargoEndDate2019-06-25
dc.date.issued2017-06-24
dc.description.abstractThe Lower Cretaceous succession in the Barents Sea is listed as a potential play model by the Norwegian Petroleum Directorate. Reservoirs may occur in deep to shallow marine clastic wedges located in proximity to palaeo-highs and along basin margins. In addition, shelf-prism-scale clinoforms with high amplitude anomalies in their top- and bottomsets have been reported from reflection seismic but they have never been drilled. In Svalbard, the exposed northwestern corner of the Barents Shelf, Lower Cretaceous strata of shelfal to paralic origin occur, and includes the Rurikfjellet (Valanginian–Hauterivian/lowermost Barremian), Helvetiafjellet (lower Barremian–lower Aptian) and Carolinefjellet formations (lower Aptian–middle Albian). By combining sedimentological outcrop studies and dinocyst analyses with offshore seismic and well ties, this study investigate the link between the onshore strata and the offshore clinoforms. Age-vise, only three (S1–S3) of the seismic sequences defined in the offshore areas correlate to the onshore strata; S1 correspond to the Rurikfjellet Formation, S2 to the Helvetiafjellet Formation and the lower Carolinefjellet Formation, and S3 to the upper Carolinefjellet Formation. Offshore, all three sequences contain generally southward prograding shelf-prism-scale clinoforms. A lower Barremian subaerial unconformity defines the base of the Helvetiafjellet Formation, and its extent indicates that most of the Svalbard platform was exposed and acted as a bypass zone in the early Barremian. Onshore palaeo-current directions is generally towards the SE, roughly consistent with the clinoform accretion-direction towards the S. The local occurrence of a 150 m thick succession of gravity flow deposits transitionally overlain by prodelta slope to delta front deposits in the Rurikfjellet Formation, may indicate that shelf-edges also developed in Svalbard. The late Hauterivian age of theses deposits potentially highlights the inferred offlapping nature of the Lower Cretaceous strata as they predate the lower Barremian unconformity, and thus record a hitherto unknown regression in Svalbard. The presence of the lower Barremian subaerial unconformity in Svalbard, the general southeastward palaeo-current directions, and the age-equivalent clinoform-packages south of Svalbard, suggests that the onshore and offshore strata is genetically linked and was part of the same palaeo-drainage system.en_US
dc.description.sponsorshipLoCrA consortium Lundin Norwayen_US
dc.descriptionAccepted manuscript version. Published version available at <a href=https://doi.org/10.1016/j.marpetgeo.2017.06.036> https://doi.org/10.1016/j.marpetgeo.2017.06.036</a>. Licensed <a href=http://creativecommons.org/licenses/by-nc-nd/4.0/> CC BY-NC-ND 4.0.</a>en_US
dc.identifier.citationGrundvåg, S.-A., Marin Restrepo, D.L., Kairanov, B., Śliwińska, K.K., Nøhr-Hansen, H., Jelbye, M.E. ... Olaussen, S. (2017). The Lower Cretaceous succession of the northwestern Barents Shelf: Onshore and offshore correlations. <i>Marine and Petroleum Geology</i>, 86, 834-857. https://doi.org/10.1016/j.marpetgeo.2017.06.036en_US
dc.identifier.issn0264-8172
dc.identifier.issn1873-4073
dc.identifier.otherFRIDAID 1489616
dc.identifier.other10.1016/j.marpetgeo.2017.06.036
dc.identifier.urihttps://hdl.handle.net/10037/14163
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalMarine and Petroleum Geology
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/PETROSENTR/228107/Norway/Research Centre for Arctic Petroleum Exploration/ARCEx/en_US
dc.rights.accessRightsembargoedAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectEarly cretaceousen_US
dc.subjectClinoformsen_US
dc.subjectBarents sea geologyen_US
dc.subjectDinoflagellateen_US
dc.subjectbiostratigraphyen_US
dc.titleThe Lower Cretaceous succession of the northwestern Barents Shelf: Onshore and offshore correlationsen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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