В монографии представлены результаты многолетних исследований автора, посвященных распределению естественных радиоактивных элементов в твердых вулканитах и радиогенных газах из вулканов и гидротерм Камчатки и Курильских островов.
Дан краткий обзор исследований радиоактивности вулканогенных пород; рассмотрено распределение радионуклидов в вулканитах региона. Особое внимание уделено радиоактивному равновесию и условиям, при которых оно нарушается.
Представлены результаты исследования радиоактивности источников Новых Толбачинских вулканов, кальдер Карымской и Академии Наук, Кихпинычского вулканического центра, района Паратунского грабена.
Книга адресована студентам и специалистам геологического и геофизического направления, а также читателям, интересующимся радиоактивностью твердых горных пород и радиогенных газов, связанных с вулканами и гидротермальными системами.
Издание может быть пособием для таких дисциплин, как ядерная геофизика, экология и других смежных направлений, связанных с радиоактивностью.
Книга рекомендована к изданию научно-техническим советом ФГБОУ ВПО "Камчатский государственный университет имени Витуса Беринга".

Bolshaya Ipelka is a shield-shaped volcano, the largest among the units of this type in Kamchatka. The most typical mega-plagiophyre volcanites show that Th/U ratio for the rocks is equal to 3.6, though the standard value for Kamchatka Quarternary volcanites comprises about 1.5. The reason of the untypical content and, respectively, the ratio of these components might be oxidation and further migration of uranium. Conditions for this likely occurred in shallow circulating peripheral magma chambers not only at Ipelka, but to less extend at some other volcanoes with mega-plagiophyre variations of magmas.

В монографии рассматривается широкий круг вопросов, касающихся геологического строения, тектоники, вулканизма и структур Южно-Камчатской вулканической зоны, обосновывается специфика ее геодинамических условий по сравнению с другими зонами Камчатки и Курильских островов. Большое внимание уделено характеристике четвертичного вулканизма.
Детально охарактеризована крупнейшая на Камчатке Паужетская кольцевая вулкано-тектоническая структура, являющаяся примером долгоживущего вулканического центра, развивающегося в течение по крайней мере 15 млн. лет. Сделано предположение о расположении этой структуры над конвекционным потоком вещества и энергии, поднимающимся из верхней мантии.

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.

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.

The actual collective monograph presents the results of both theoretical and experimental studies of the multi-disciplinary problem on volcanic hazard assessment and development of techniques for prediction of catastophic eruptions. The volcanism of Kamchatka and other regions of Russia has been analyzed. On the basis of geological, volcanological and tephrachronological studies including radiocarbon dating, there have been defined certain groups of volcanoes on different stages of evolution. At the same time the problem of determination of the internal structure of volcanic dome using modem theoretical methods and technologies is well investigated. The new techniques of estimation of volcanic hazard were developed. Whenever ti is required, theoretical approaches are confirmed by results of in-field observations.

The book will satisfy the needs of Earth sciences specialists from a variety of backgrounds, volcanology, geo-mechanics, ecology, industrial constuction applications and hazard assessment.