Hf Isotope Evidence for a Miocene Change in the Kerguelen Mantle Plume Composition |
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| Authors: | MATTIELLI NADINE; WEIS DOMINIQUE; BLICHERT-TOFT JANNE; ALBAREDE FRANCIS |
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| Institution: | 1DÉPARTEMENT DES SCIENCES DE LA TERRE ET DE L’ENVIRONNEMENT, UNIVERSITÉ LIBRE DE BRUXELLES, CP160/02, AVENUE F. D. ROOSEVELT, 50, B-1050 BRUSSELS, BELGIUM
2ÉCOLE NATIONALE SUPÉRIEURE DE LYON, UMR CNRS 5570, 69364 LYON, FRANCE |
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| Abstract: | We report high-precision multiple collector inductively coupledplasma mass spectrometry (MC-ICP-MS) analyses of Hf isotopiccompositions for 39 Kerguelen Archipelago volcanic rocks thatadd a new perspective to the temporal evolution of the Kerguelenmantle plume. Samples cover the entire range of chemical andSr, Nd and Pb isotopic variations reported for the archipelago,and vary in age from 29 to 0·1 Ma. Their Hf isotopiccompositions show the largest variation for an individual oceanicisland and |
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