Sedimentology and geochemistry of Late Jurassic organic-rich shelfal mudstones from East Greenland: regional and stratigraphic variations in source-rock quality

Strogen, D. P. and Burwood, R. and Whitham, A. G. (2005) Sedimentology and geochemistry of Late Jurassic organic-rich shelfal mudstones from East Greenland: regional and stratigraphic variations in source-rock quality. In: Petroleum geology: North-west Europe and global perspectives - Proceedings of the 6th Petroleum Geology Conference. Geological Society, London, pp. 903-912.

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Abstract

Late Jurassic (Late Oxfordian–Early Volgian) sediments exposed across a wide area of East Greenland are dominated by organic-rich mudstones and sandy mudstones and reach a maximum thickness of 500 m. The facies are characterized by parallel-laminated, generally unbioturbated mudstones, in some cases containing thin sandstone laminae. Deposition occurred in an offshore shelf environment, with water depths difficult to constrain. In the northern sections, heterolithic, sandier units occur at the base of the mudstone succession, marking a gradual transition from the underlying shallow-marine sandstones. Mudstones in the south (Milne Land–Jameson Land) are more oil prone, with greater dilution by terrestrially derived Type III/IV kerogen in the north (Wollaston Forland–Kuhn Ø). In both areas there is an improvement in source-rock quality and oil proneness from proximal to distal settings, with the geochemical data in agreement with the palaeogeographical interpretation. In the south, the Late Kimmeridgian to Early Volgian marks the maximum westward transgression of source-rock facies and also represents the richest source interval. In the north there is a decrease in sand content through the Late Oxfordian–Kimmeridgian, although trends in source-rock quality are less clear. Whilst the northern sections are predominantly gas prone, some marginally oil-prone mudstones do occur. The Vøring and Møre basins were situated immediately to the east of Greenland in the Late Jurassic. The presence of a continuous blanket of potential source rocks in East Greenland and the eastward improvement in source-rock properties implies that good quality oil-prone source rocks of Late Jurassic age are likely to be present in the Vøring and Møre basins.

Item Type: Book Section
Additional Information: E&P Geochem Advisory;cml The doi link is currently not working
Uncontrolled Keywords: 2005 AREP IA45 CASP IA47 2005 P
Subjects: 05 - Petrology - Igneous, Metamorphic and Volcanic Studies
Divisions: 05 - Petrology - Igneous, Metamorphic and Volcanic Studies
Page Range: pp. 903-912
Identification Number: 10.1144/​0060903
Depositing User: Sarah Humbert
Date Deposited: 01 Nov 2011 17:11
Last Modified: 23 Jul 2013 09:58
URI: http://eprints.esc.cam.ac.uk/id/eprint/1555

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