В книге приводится систематическое описание вулканов Ключевской группы (на Камчатке): их геологическое строение, петрология и эволюция, а также геолого-петрографические схемы района в целом и отдельных вулканов. На тектонической основе проведено расчленение пород на две формации: базальт-андезито-базальтовую и базальт-андезито-дацитовую, которые отличаются по вещественному составу пород, набору включений, тектоническим условиям проявления и связи с различными зонами генерации магмы. С использованием сейсмологических данных и ГСЗ показано, что источники магмы пород первой формации располагаются в верхней мантии, а второй формации — в земной коре. Предложена единая схема тектоно-магматического процесса, в котором извержения базальтов связываются с растяжениями и оживлением глубинного разлома, а чередующиеся с ними извержения пород среднего состава — с эпохами сжатия, вертикальными движениями и палингенезом в земной коре.

Дан очерк развития идей в области вулканической геологии за последние 10 лет. Приводится описание геологии вулканических районов и крупнейших геотермальных систем Камчатки.

This book is the first work that provides the ultimate data about chemical composition of the Kamchatka Quaternary andesites. Besides the book provides data about a phase analysis of andesites, geochemical composition, REE composition and isotopic analysis of strontium, neodymium and oxygen. The analyses are prominent for their stratification and accurate geological positioning. This allows understanding how the geological events alternated. The paper is focused on the petrogenetic peculiarities of tholeiitic (the 1st type of mantle genesis) and calc-alkali (the 2nd type of mantle-crust genesis) andesites. The book stresses that petrochemical, petrological and isotopic-geochemical correlators play a great role in distinguishing of those two types of andesites. On the basis of petrochemical database we distinguished three trends of the volcanites differentiation: stable, unstable and intermediate. These trends are supposed to be used for the determination of the volcanic activity character and types of the volcanic eruptions.
This book will be helpful as a reference guide to volcanologists, petrographers, geochemists and geologists, to those who study the genesis of volcanic rocks.

New data on deep-seated structure of the Central Kamchatka depression (CKD) and rock composition of the basement are represented in this paper. Structural position of the Quaternary volcanoes is defined. Based on the geologic-geophysical data a zonal structure of the CKD is found. Margins of the three large longitudinal structural zones are distinguished and defined: depressive East and West and buried Khavyvenka rises. A block structure of CKD is distinctly fixed within the mentioned zones. Geophysical data testify to the anomalous permeability and active geothermal-fluid conditions within the CKD which correlates well with its riftogenic origin.

Isotope-geochemical material for Pliocene-Quaternary volcanoes of the Kamchatka region is generalized on a cartographic basis. The Sr-isotope anomalies of moderate and elevated radiogenicity, geochemically confirmed, are spatially conjugated. This made it possible to interpret these anomalies not only as a reflection of mantle plume material in the composition of volcanic rocks, but also of its hybrid environment, as a consequence of plum-lithosphere remobilization. The presence of multi-directional geochemical trends made it possible to propose the concept of moving boundary values for the composition of indicator rocks of the intraplate type and adakites, which significantly expanded the possibilities of their diagnostics. The isotope-geochemical heterogeneity of basaltoids of the region is generally determined by the peculiarities of concentration of rocks with intraplate and adakite geochemical characteristics, which allows considering the asthenospheric diapirism as the main factor of petrogenesis of Pliocene-Quaternary volcanism in Kamchatka.