Mid-tertiary igneous activity in east Greenland — The Kialineq complex |
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| Authors: | P E Brown O van Breeman R H Noble R M Macintyre |
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| Institution: | (1) Department of Geology and Mineralogy, The University, Broad Street, AB9 1AS Aberdeen, UK;(2) Scottish Universities Research and Reactor Centre, East Kilbride, G75 OQU Glasgow, UK |
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| Abstract: | The igneous rocks of the Kialineq area on the East Greenland coast at 67 ° N comprise, gabbro, acid-basic breccia and net-vein complexes, syenite and granite and minor volcanics. Rb-Sr whole-rock and mineral isochrons for the epizonal syenites, granites and acid-basic complexes indicate a consanguineous mantle origin at 35±2 m.y. B.P. in agreement with the age obtained by K-Ar dating of biotites and hornblendes. This igneous activity may be associated with major reorganisation of plate geometry in the North Atlantic and Arctic oceans at this time. |
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