The sub‐Antarctic Antipodes Volcano: a <0.5 Ma HIMU‐like Surtseyan volcanic outpost on the edge of the Campbell Plateau, New Zealand

The Antipodes Volcano, located on the edge of New Zealand's Campbell Plateau, exhibits distinctive geochemical and isotopic characteristics that provide a unique baseline for studying HIMU-like mantle sources. The volcano's youthful nature—indicated by well-preserved volcanic features and Ar/Ar ages of ≤0.5 million years—reveals a fractionation process dominated by clinopyroxene and olivine removal, with minimal continental crust interaction. Its lavas show consistently high 206 Pb/204 Pb and low 87 Sr/86 Sr ratios, comparable to anhydrous, Pb- and K-depleted peridotitic mantle xenoliths from Zealandia's intraplate volcanoes. This suggests that the Zealandia lithospheric mantle is isotopically heterogeneous, challenging the notion that all Zealandia Cretaceous–Cenozoic intraplate volcanoes tap a HIMU-like reservoir.

Scott, J., Turnbull, I., Auer, A., & Palin, J. (2013). The sub‐Antarctic Antipodes Volcano: a <0.5 Ma HIMU‐like Surtseyan volcanic outpost on the edge of the Campbell Plateau, New Zealand. New Zealand Journal of Geology and Geophysics, 56(3), 134–153. Portico. https://doi.org/10.1080/00288306.2013.802246