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 LILE, LREE and HFSE from the front to the back-arc. La/Yb and Nb/Zr increase
from the arc front to the back arc while B/Li and As, Sb, B, Cl and S concentrations decrease.
The initial mantle source below Kamchatka ranges from N-MORB-like in the volcanic front
and Central Kamchatka Depression to more enriched in the back arc. Rocks from the Central
Kamchatka Depression range in 87Sr/86Sr ratios from 0.70334 to 0.70366, but have almost
constant Nd isotopic ratios (143Nd/144Nd 0.51307–0.51312). This correlates with the highest
U/Th ratios in these rocks and suggest the highest fluid-flux in the source region.
Holocene large eruptions and eruptive histories of individual Holocene volcanoes have been
studied with the help of tephrochronology and 14C dating that permits analysis of time-space
patterns of volcanic activity, evolution of the erupted products, and volcanic hazards.

The monograph is devoted to the spatio-temporal activation of Holocene volcanism within the Miocene-Quaternary volcanic zone of the Sredinny Range of Kamchatka. The pattern of volcanic activation, grouping elements and periodic pulses of endogenous activity, as well as their chronological relationship with episodes of endogenous activity increasing of the North Pacific. The characteristics of individual volcanic centers and the largest eruptions are provided. Age determinations of eruptions are based on detailed tephrochronological research and extensive radiocarbon dating.
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The paper presents data on specified northern boundary of the Holocene volcanic activity in Kamchatka. This boundary is located 80 km to the north for the frontal volcanic zone and 180 km to the northwest from Sheveluch Volcano for the zone of the Sredinny Range. For the first time numerous evidence for the Holocene volcanic activity within the Kamchatkan zones with no deep seismicity and located to the north from the Aleutian transform fault were detected, studied and dated using geologic methods and isotope geochemistry. Radiocarbon age for the eruptions was estimated.