THE STRUCTURE OF LOW-VELOCITY ZONES IN THE MANTLE OF THE NORTHERN EUROPE

The areas of low-velocity middle mantle shift into the transition zone are distinguished according to 3-d P-velocity model of the Fennoscandian shield mantle and its surroundings using Taylor approximation method. Within the Kola-Karelia megablock there are the White Sea and Varanger mantle domains...

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Bibliographic Details
Published in:Proceedings of the Karelian Research Centre of the Russian Academy of Sciences
Main Authors: Татьяна Цветкова, Игорь Валентинович Бугаенко, Лариса Николаевна Заец, Tatiana Tsvetkova, Igor Bugaienko, Larisa Zaiets
Format: Article in Journal/Newspaper
Language:English
Russian
Published: Karelian Research Centre of the Russian Academy of Sciences 2015
Subjects:
3-d р-скоростная модель
мантия
фенноскандия
Science
Q
White Sea
Fennoscandian
Varanger
Lapland
Online Access:https://doi.org/10.17076/geo157
https://doaj.org/article/52792deb81c04a49ac3df78f1979b8bf
Description
Summary:The areas of low-velocity middle mantle shift into the transition zone are distinguished according to 3-d P-velocity model of the Fennoscandian shield mantle and its surroundings using Taylor approximation method. Within the Kola-Karelia megablock there are the White Sea and Varanger mantle domains along with the Kostomuksha and Lapland upper mantle domains. Within the Svecofennian megablock there is the Shellefteo domain, and within the Sveconorwegian megablock - subvertical mantle column of altering high and low-velocity P-waves corresponding to superdeep mantle of the Oslo graben. Based on the conducted analysis the following general velocity features of the distinguished domains are defined: the areas of low-velocity middle mantle shift into the transition zone of the upper mantle, stratification of the upper mantle and its transition zone.

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