Geochemical Constraints on the Role of Oceanic Lithosphere in Intra-Volcano Heterogeneity at West Maui, Hawaii |
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| Authors: | GAFFNEY AMY M; NELSON BRUCE K; BLICHERT-TOFT JANNE |
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| Institution: | 1 DEPARTMENT OF EARTH AND SPACE SCIENCES, UNIVERSITY OF WASHINGTON, BOX 351310, SEATTLE, WA 98195, USA
2 LABORATOIRE DES SCIENCES DE LA TERRE, ÉCOLE NORMALE SUPÉRIEURE, 46 ALLÉE D'ITALIE, 69364 LYON, CEDEX 7, FRANCE |
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| Abstract: | Stratigraphically well-constrained sequences of late shield-buildingstage lavas from West Maui volcano, Hawaii, show age-dependentcompositional variability distinct from that seen in shield-stagelavas from any other Hawaiian volcano. These distinctions aredefined by 206Pb/204Pb–208Pb/204Pb variation as well as87Sr/86Sr correlation with 206Pb/204Pb and trace element compositions.The West Maui lavas from stratigraphically higher in the sequencehave major and trace element and Sr–Pb–Hf–Ndisotopic compositions similar to Kea-type lavas sampled at theyounger Mauna Kea and Kilauea volcanoes, indicating that theKea compositional end-member of Hawaiian lavas has remainedhomogeneous over |
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| Keywords: | : Hawaii Kea component oceanic lithosphere Sr– Pb– Hf– Nd isotopes |
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