The Prinsen af Wales Bjerge Formation lavas, East Greenland; the transition from tholeiitic to alkalic magmatism during Palaeogene continental break-up

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doi: 10.1093/petrology/44.2.279
Authors:Peate, D. W.; Baker, J. A.; Blichert-Toft, J.; Hilton, D. R.; Storey, M.; Kent, A. J. R.; Brooks, C. K.; Hansen, H.; Pedersen, A. K.; Duncan, R. A.
Author Affiliations:Primary:
Danish Lithosphere Centre, Copenhagen, Denmark
École Normale Supérieure de Lyon, France
Scripps Institution of Oceanography, United States
Geological Museum, Denmark
Oregon State University, United States
Volume Title:Journal of Petrology
Source:Journal of Petrology, 44(2), p.279-304. Publisher: Oxford University Press, Oxford, United Kingdom. ISSN: 0022-3530
Publication Date:2003
Note:In English. 107 refs.; illus., incl. 5 tables, sketch maps
Summary:Major, trace, REE and Sr, Nd, Pb, Hf, Os and He isotopic, analyses of tholeiites, alkali basalts, picrites, tephritic basanites and trachybasalts (data listed) dated 55-52 m.y. old show that this inland alkalic activity was contemporaneous with the main tholeiitic plateau lavas and also post-dated them. The alkalic rocks show marked crustal contamination, plot below the 'Nd-Hf mantle array' and have trace elements similar to HIMU OIB. The uncontaminated magma has 206Pb/204Pb values > 19.2 and is more radiogenic than the plateau lavas and Icelandic basalts, having an enriched component which may be derived from recycled material (of uncertain origin) within the plume. [B.E.L.]
Subsections:Igneous rocks
Subjects:Alkalic composition; Basalts; Cenozoic; Flood basalts; Geochemistry; Iceland Plume; Igneous rocks; Lava; Lithogeochemistry; Magmatism; Paleogene; Tertiary; Tholeiitic composition; Volcanic rocks; Arctic region; East Greenland; Greenland; Prinsen af Wales Bjerge Formation
Coordinates:N680000 N680000 W0320000 W0320000
Abstract Numbers:03M/2858
Record ID:2004016934
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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