Mid-Cretaceous Hawaiian tholeiites preserved in Kamchatka

Oceanic island basalts in accretionary complexes of SW Japan: Tectonic and petrogenetic implications

“…Under older/thick lithosphere, the melting column would be shorter and a heterogeneous mantle source could produce basaltic melts more enriched in incompatible elements due to lower degree melting. Such a relation was first estimated for the older Smagin and Meiji (90 and 83 Ma) and younger Nintoku and Daikakuji (55-42 Ma) seamounts of the Emperor-Hawaii Chain of Seamounts in the Pacific Ocean (Regelous et al, 2003;Portnyagin et al, 2008) and for the Kerguelen hot spot track (Frey and Weis, 1995). Such a tendency have been noted for several Paleozoic OPS localities For details of the modeling see (Safonova et al, 2012).…”

Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism

“…Upon subduction of the ocean floor, seamounts can also serve as prominent asperities generating earthquakes (e.g., Watts et al, 2010 for a recent review). As the subduction process can lead to crustal accretion of seamounts, they can be preserved in the accessible geological record, providing important insights from the evolution of hotspot tracks and continental margins to biological exchange between continents (e.g., Hoernle et al, 2002;Geldmacher et al, 2008;Portnyagin et al, 2008;Buchs et al, 2011;Safonova and Santosh, 2012). Despite the manifold contributions of seamounts to the dynamics of diverse earth systems, their process of formation is still debated.…”

Geochemistry of the late Holocene rocks from the Tolbachik volcanic field, Kamchatka: Quantitative modelling of subduction-related open magmatic systems

“…There is some evidence that older Emperor Seamounts were subducted beneath Central Kamchatka (Portnyagin et al, 2008b Table 6). Both MORB-AOC and Meiji-AOC have distinctively…”