Lithological structure of western Pacific lithosphere reconstructed from mantle xenoliths in a petit-spot volcano

Kazuto Mikuni, Naoto Hirano, Norikatsu Akizawa, Junji Yamamoto, Shiki Machida, Akihiro Tamura, Yuuki Hagiwara & Tomoaki Morishita
Abstract The lithospheric mantle, formed at the mid-ocean ridge as a residue of crustal production, comprises theoretically depleted peridotite, but more fertile components (e.g., lherzolite and pyroxenite) have been reported, creating an enigmatic picture of the lithosphere. The oceanic lithosphere has also been found to be locally modified by intraplate magmatism as proposed from geochemistry of mantle xenolith. Petit-spot xenoliths are particularly notable as direct evidence of old lithospheric mantle and expected to retain essential...
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