Late Pleistocene-Holocene Volcanism on the Kamchatka Peninsula, Northwest Pacific Region

Ponomareva V.V.
Churikova T.
Melekestsev I.V.
Braitseva O.A.
Pevzner M.
Sulerzhitskii L.

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Publication date

January 2007

DOI

10.1029/172GM15

Publisher

American Geophysical Union

ISSN

0065-8448

Citation count (estimate)

Abstract

Late Pleistocene-Holocene volcanism in Kamchatka results from the subduction of the Pacific Plate under the peninsula and forms three volcanic belts arranged in en echelon manner from southeast to northwest. The cross-arc extent of recent volcanism exceeds 250 km and is one of the widest worldwide. All the belts are dominated by mafic rocks. Eruptives with SiO2>57% constitute ~25% of the most productive Central Kamchatka Depression belt and ~30% of the Eastern volcanic front, but <10% of the least productive Sredinny Range belt. All the Kamchatka volcanic rocks exhibit typical arc-type signatures and are represented by basalt-rhyolite series differing in alkalis. Typical Kamchatka arc basalts display a strong increase in LIL...