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Seismic stratigraphic analysis of Carboniferous strata on the Burin Platform, offshore Eastern Canada

Pascucci, Vincenzo and Gibling, Martin R. and Williamson, Mark A. (1999) Seismic stratigraphic analysis of Carboniferous strata on the Burin Platform, offshore Eastern Canada. Bulletin of Canadian Petroleum Geology , Vol. 47 (3), p. 298-316. ISSN 0007-4802. Article.

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Carboniferous strata cover large areas of the Burin Platform on the Atlantic continental margin south of Newfoundland, where they are approximately 1800 m thick and overlain unconformably by Mesozoic strata. Study of seismic lines tied to the Hermine E-94 well has identified three unconformity-bounded units that are broadly similar to units else-where in Atlantic Canada. Unit 1 rests unconformably on poorly imaged rocks of the Avalon Terrane, includes prominent evaporite diapirs and pillows, and is assigned to the Windsor Group (Visean). Unit 2 is assigned to the Mabou Group (upper Visean to Namurian) and may include part of the Pictou Group locally; reflectors downlap onto a basal unconformity, which probably represents a slight hiatus. Unit 3 is assigned to the Pictou Group (Westphalian B and younger), and Westphalian coal measures are apparently missing. A local unconformity is present at the base of Unit 3 adjacent to Windsor diapirs, passing laterally into a correlative conformity. Deformation at this level is associated primarily with evaporite movement and appears to be the main expression of regional mid-Carboniferous tectonism. The diapirs do not cut the Cretaceous succession. The basal Windsor unconformity forms a regional detachment at the evaporite level, which is inferred to have been active during the latest Paleozoic and/or early Mesozoic, probably in association with a transfer fault on the developing continental margin. Carboniferous strata overlie Meguma Terrane rocks south of the hinge zone to the Mesozoic Laurentian Subbasin.

Item Type:Article
ID Code:5326
Uncontrolled Keywords:Seismic stratigraphy, Burin Platform, carboniferous eastern Canada
Subjects:Area 04 - Scienze della terra > GEO/02 Geologia stratigrafica e sedimentologica
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:Canadian Society of Petroleum Geologists
Deposited On:21 Jan 2011 12:38

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