--> Abstract: The Jameson Land Rift Basin, East Greenland: Syn- and Postrift Play Types, by C. Marcussen, F. G. Christiansen, G. Dam, H. C. Larsen, S. Piasecki, and L. Stemmerik; #91012 (1992).

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ABSTRACT: The Jameson Land Rift Basin, East Greenland: Syn- and Postrift Play Types

MARCUSSEN, CHRISTIAN, FLEMMING G. CHRISTIANSEN, GREGERS DAM, HANS C. LARSEN, STEFAN PIASECKI, and LARS STEMMERIK, Geological Survey of Greenland, Copenhagen, Denmark

The 10,000 sq. kilometers large Jameson Land rift basin is the southernmost of a series of late Paleozoic-Mesozoic basins onshore East Greenland that prior to the formation of the North Atlantic formed part of the petroliferous basin trend off northwestern Europe.

Geological mapping and deep seismic studies show the following likely sequence of structural events during the Jameson Land basin formation: (1) Post-Caledonian basin formation starting during the Early Devonian with 30-40 km of east-west crustal extension by simple shear accompanied by deposition of 5-7 km of continental sediments. (2) A further 10-15 km of extension involving antithetic faulting and rotation in Late Devonian to Early Carboniferous time and associated with local transpression along the basin margins. Half-grabens were filled with 1-6 km of Carboniferous and Lower Permian continental synrift sediments leveling out most of the tectonic relief. (3) Dominantly thermal subsidence in Late Permian through Tertiary time with deposition of 5-6 km marine and continental postri t sediments. (4) Early Tertiary igneous activity with emplacement of sills and dykes and extrusion of lavas. A southward tilting of the basin may have started at this time. (5) Regional Tertiary uplift of the order of 1-2 km, accelerating in Late Tertiary.

Play concepts are suggested on the basis of spatial relations identified in exposed sediments or recognized during seismic interpretation: A Devonian-Carboniferous structural fault block play has Carboniferous lacustrine shales as source rock, fluvial Devonian to Permian sandstones as reservoirs, and fluvial/lacustrine shales as seal. An Upper Permian postrift play has carbonate buildups as reservoirs and the juxtaposed marine shales as source rock and seal. A Lower Jurassic play has lacustrine shales as source rock and seal and intraformational shale-enclosed delta front sandstones as reservoir. Other play concepts are related to Upper Permian platform carbonates, stratigraphic pinch-outs, and combined structural-stratigraphic plays.

 

AAPG Search and Discovery Article #91012©1992 AAPG Annual Meeting, Calgary, Alberta, Canada, June 22-25, 1992 (2009)