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Sr, Nd, Pb and O Isotopes of Minettes from Schirmacher Oasis, East Antarctica: a Case of Mantle Metasomatism involving Subducted Continental Material |
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| Authors: | HOCH MARION; REHKAMPER MARK; TOBSCHALL HEINZ J |
| Institution: | 1INSTITUTE OF GEOLOGY AND MINERALOGY, UNIVERSITY OF ERLANGEN–NÜRNBERG, SCHLOSSGARTEN 5, D-91054 ERLANGEN, GERMANY 2INSTITUTE OF MINERALOGY, UNIVERSITY OF MÜNSTER, CORRENSSTR. 24, D-48149 MÜNSTER, GERMANY 3INSTITUTE OF ISOTOPE GEOLOGY AND MINERAL RESOURCES, ETH ZURICH, NO C61, CH-8092 ZÜRICH, SWITZERLAND |
| Abstract: | Numerous minette dykes intersect the Precambrian crystallinebasement of Schirmacher Oasis, East Antarctica. This study presentsnew Sr, Nd, Pb and O isotope data for 11 minette samples fromfour different dykes. The samples are characterized by relativelyhigh 87Sr/86Sr (0·7077–0·7134), 207Pb/204Pb(15·45–15·55) and 208Pb/204Pb (37·8–39·8),combined with low 143Nd/144Nd ( |
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