Articles | Volume 15, issue 2
https://doi.org/10.5194/se-15-167-2024
https://doi.org/10.5194/se-15-167-2024
Research article
 | 
08 Feb 2024
Research article |  | 08 Feb 2024

Contribution of carbonatite and recycled oceanic crust to petit-spot lavas on the western Pacific Plate

Kazuto Mikuni, Naoto Hirano, Shiki Machida, Hirochika Sumino, Norikatsu Akizawa, Akihiro Tamura, Tomoaki Morishita, and Yasuhiro Kato

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Short summary
Plate tectonics theory is the motion of rocky plates (lithosphere) over ductile zones (asthenosphere). The causes of the lithosphere–asthenosphere boundary (LAB) are controversial; however, petit-spot volcanism supports the presence of melt at the LAB. We conducted geochemistry, geochronology, and geochemical modeling of petit-spot volcanoes on the western Pacific Plate, and the results suggested that carbonatite melt and recycled oceanic crust induced the partial melting at the LAB.