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Crustal Deformations Related to the Formation of New Tolbachik Volcanoes in 1975-1976, Kamchatka

Fedotov S.A. (1980) Crustal Deformations Related to the Formation of New Tolbachik Volcanoes in 1975-1976, Kamchatka // Bulletin Volcanologique. Vol. 43. No. 1. pp. 35-46.

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Abstract

The paper discusses the results of geodetic investigations performed in the region of the large 1975-1976 Tolbachik fissure eruption in Kamchatka. Using data from repeated triangu-lation and trigonometric levelings, horizontal and vertical displacements have been detected in an area of 3,500 km2. Two zones have been recognized: the tension and uplift zone that is probably due to magma intrusion from depths to the surface along the line of new cones and the extensive compensative subsidence zone located at a distance of 20-50 km from the nearest newly-formed cones.??Measurements made with small distance measuring device showed the dynamics of feeding basalt dykes intrusion and made it possible to determine their width (a little greater than 1 m) and magma and gas overpressure (50-250 bar). Data have been obtained on dimensions and growth of cones and on vertical ground deformation in the area of new cones during and after the eruption.??
Item Type: Article
Title: Crustal Deformations Related to the Formation of New Tolbachik Volcanoes in 1975-1976, Kamchatka
Language: English
Journal or Publication Title: Bulletin Volcanologique
ISSN Print: 0366-483X
ISSN Online: 1432-0819
Subjects: State scientific and technical information rubricator (ГРНТИ) > 38 ГЕОЛОГИЯ > 38.37 Петрография > 38.37.25 Вулканология
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Plosky Tolbachik
Depositing User: С.Э. Васильев
Date Deposited: 25 Sep 2014 00:30
Last Modified: 25 Sep 2014 00:30
URI: http://repo.kscnet.ru/id/eprint/1855

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