The stratigraphy and structure of the Faroese continental margin

Online Access: Get full text
doi: 10.1144/SP447.4
Author(s): Olavsdottir, Jana; Eidesgaard, Oluva R.; Stoker, Martyn S.
Author Affiliation(s): Primary:
Jarethfeingi, Faroe Earth and Energy Directorate, Torshavn, Faeroe Islands
British Geological Survey, United Kingdom
Volume Title: NE Atlantic region; a reappraisal of crustal structure, tectonostratigraphy and magmatic evolution
Volume Author(s): Péron-Pinvidic, Gwenn, editor; Hopper, John R.; Stoker, Martyn S.; Gaina, Carmen; Doornenbal, J. C.; Funck, Thomas; Arting, U. E.
Source: The NE Atlantic region; a reappraisal of crustal structure, tectonostratigraphy and magmatic evolution, edited by Gwenn Péron-Pinvidic, John R. Hopper, Martyn S. Stoker, Carmen Gaina, J. C. Doornenbal, Thomas Funck and U. E. Arting. Special Publication - Geological Society of London, 447(1), p.339-356. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0305-8719 CODEN: GSLSBW
Note: In English. 120 refs.Online First; illus., incl. strat. cols., sect., sketch maps
Summary: This paper presents a summary of the stratigraphy and structure of the Faroese region. As the Faroese area is mostly covered by volcanic material, the nature of the pre-volcanic geology remains largely unproven. Seismic refraction data provide some indications of the distribution of crystalline basement, which probably comprises Archaean rocks, with the overlying cover composed predominantly of Upper Mesozoic (Cretaceous?) and Cenozoic strata. The Cenozoic succession is dominated by the syn-break-up Faroe Islands Basalt Group, which crops out on the Faroe Islands (where it is up to 6.6 km thick) and shelf areas; post-break-up sediments are preserved in the adjacent deep-water basins, including the Faroe-Shetland Basin. Seismic interpretation of the post-volcanic strata shows that almost every sub-basin in the Faroe-Shetland Basin has been affected by structural inversion, particularly during the Miocene. These effects are also observed on the Faroe Platform, the Munkagrunnur Ridge and the Fugloy Ridge, where interpretation of low-gravity anomalies suggests a large-scale fold pattern. The structure of the Iceland-Faroe Ridge, which borders the NW part of the Faroe area, remains ambiguous. The generally thick crust, together with the absence of well-defined seawards-dipping reflectors, may indicate that much of it is underlain by continental material.
Year of Publication: 2016
Research Program: DSDP Deep Sea Drilling Project
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; 16 Structural Geology; Atlantic Ocean; Atlantic Ocean Islands; Basement; Basin inversion; Continental margin; Crust; Crystalline rocks; DSDP Site 336; Deep Sea Drilling Project; Faeroe Islands; Faeroe Platform; Faeroe-Shetland Basin; Fugloy Ridge; Geophysical profiles; Gravity anomalies; Iceland-Faeroe Ridge; Igneous rocks; Inversion tectonics; Leg 38; Munkagrunnur Ridge; North Atlantic; Regional; Seismic profiles; Tectonics; Tectonostratigraphic units; Volcanic rocks
Coordinates: N632103 N632104 W0074716 W0074717
Record ID: 2017010934
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom