Late Cretaceous (99-69 Ma) basaltic intraplate volcanism on and around Zealandia: Tracing upper mantle geodynamics from Hikurangi Plateau collision to Gondwana breakup and beyond

Kaj Hoernle,Christian Timm,Folkmar Hauff, V. Tappenden,Reinhard Werner,Ester Jolis,Nicholas Mortimer,S. Weaver,Florian Riefstahl,Karsten Gohl

Earth and Planetary Science Letters（2020）

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摘要

•Common HIMU end member in adjacent continental and oceanic volcanic provinces.•End member St. Helena HIMU derived from deep upwelling(s)/plume(s).•Plateau collision & plume interaction with Gondwana active margin causes breakup.•Hybrid volcanic-tectonic margins resulted from Zealandia – Antarctica breakup.

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关键词

Zealandia continental breakup,Hikurangi Plateau collision,Gondwana subduction,major & trace element & isotope geochemistry,St. Helena HIMU mantle end member,mantle plume

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