Origin of the Palaeogene Vøring Plateau volcanic sequence
- 1 January 1988
- journal article
- Published by Geological Society of London in Geological Society, London, Special Publications
- Vol. 39 (1) , 69-83
- https://doi.org/10.1144/gsl.sp.1988.039.01.08
Abstract
Summary: During ODP Leg 104 a 900 m thick sequence of volcanic rocks was drilled at Site 642E on the Vøring Plateau. It was subdivided into an Upper and a Lower Series separated by 7 m of estuarine volcaniclastic and epiclastic rocks. The Upper Series comprises transitional-type mid-oceanic ridge tholeiites with chemical affinities to the Faeroes and E Greenland plateau basalts and to Recent basalts from transitional segments of the mid-Atlantic ridge such as Reykjanes Ridge. The magmas are interpreted as having been derived from a secondarily LIL-element enriched, primarily strongly depleted mantle source. Some flows and dykes show evidence of minor contamination by upper continental crustal rocks. Interlayered tuffs are more differentiated and ferrobasaltic, and are interpreted to have been derived from a LIL-element enriched plume-type mantle source. The Lower Series contains 13 peraluminous dacite flows representing melts of upper crustal metasedimentary rocks such as shales and greywackes. The dacites overlie five basaltic andesite flows formed by mixing of LIL-element depleted tholeiitic magma with upper crustal melts.Keywords
This publication has 36 references indexed in Scilit:
- Faeroe-Iceland plume: Rare-earth evidencePublished by Elsevier ,2002
- The genesis and significance of N-MORB sub-typesContributions to Mineralogy and Petrology, 1989
- Strongly Depleted Tholeiites from the Rockall Plateau Margin, North Atlantic: Geochemistry and MineralogyPublished by International Ocean Discovery Program (IODP) ,1984
- Myggbukta and Kap Broer Ruys: the most northerly of the East Greenland Tertiary igneous centres(?)Mineralogical Magazine, 1984
- STRATIGRAPHICAL DISTRIBUTION OF EARLY PALAEOGENE PYROCLASTIC DEPOSITS IN THE NORTH SEA BASINProceedings of the Yorkshire Geological and Polytechnic Society, 1983
- Fall-out and deposition of volcanic ash during the 1979 explosive eruption of the soufriere of St. VincentJournal of Volcanology and Geothermal Research, 1982
- Magmatism of the British Tertiary Volcanic ProvinceScottish Journal of Geology, 1982
- The application of a ThHfTa diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary Volcanic ProvinceEarth and Planetary Science Letters, 1980
- Tertiary volcanism in northern E Greenland: Gauss Halvø and Hold with HopeJournal of the Geological Society, 1980
- The diagnostic geochemistry, relative abundance, and spatial distribution of high-calcium, low-alkali olivine tholeiite dykes in the Lower Tertiary regional swarm of the Isle of Skye, NW ScotlandMineralogical Magazine, 1977