Sandstone wedges of the Cretaceous-Lower Tertiary Kangerlussuaq Basin, East Greenland - outcrop analogues to the offshore North Atlantic

M. Larsen, L. Hamberg, S. Olaussen, T. Preuss, L. Stemmerik

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingspeer-review

27 Citations (Scopus)

Abstract

The Kangerlussuaq Basin is situated in southern East Greenland (68°30'N). The exposed 1 km thick sedimentary succession records a mid-Cretaceous to Tertiary basin history of Late Aptian-Albian transgression, Late Cretaceous-Early Paleocene highstand and mid-Paleocene uplift and erosion. The sediments are overlain by Upper Paleocene volcaniclastics, pyroclastics and flood basalts associated with continental break-up. Tertiary uplift and erosion has exposed the basin fill and it now represents one of the few outcrop analogues to the offshore Cretaceous-Tertiary sedimentary basins along the deep water margins of the North Atlantic. Three major sandstone-dominated intervals are identified in the succession: (1) mid-Cretaceous fluvio-estuarine sandstones; (2) Lower Paleocene submarine fan sandstones; and (3) mid-Paleocene fluvial and deltaic sandstones and conglomerates. The originally excellent reservoir properties of the sandstone bodies have been strongly modified by more than 4 km of burial and local high heat flux. Mechanical compaction, quartz precipitation, calcite cementation and illitization are the main porosity and permeability reducing agents in the rock sequence. The three major episodes of sandstone deposition were related to initial transgression and later relative sea-level falls and may help prediction of stratigraphic intervals with possible reservoir units in the undrilled offshore basins of the northern North Atlantic. The occurrence of mid-Paleocene proximal fluvial fades, thus suggests sediment bypass and deposition of coarse-grained elastics in the offshore areas southeast of Greenland and around the Faeroe Islands.

Original languageEnglish
Title of host publicationPetroleum geology of northwest Europe: Proceedings of the 5th conference
EditorsA.J. Fleet, S.A.R. Boldy
PublisherGeological Society of London
Pages337-348
Number of pages12
Volume1
ISBN (Print)1-86239-039-8
DOIs
Publication statusPublished - 1999
Event5th Conference on the Petroleum Geology of Northwest Europe - Barbican Centre, London, United Kingdom
Duration: 26 Oct 199729 Oct 1997

Publication series

NamePetroleum Geology Conference Proceedings
PublisherGeological Society of London
Volume5
ISSN (Print)2047-9921

Conference

Conference5th Conference on the Petroleum Geology of Northwest Europe
Country/TerritoryUnited Kingdom
CityLondon
Period26/10/9729/10/97

Programme Area

  • Programme Area 3: Energy Resources

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