IMPRINTS OF PLUME PROCESSES IN THE MODERN LITHOSPHERIC VELOCITY STRUCTURE OF THE KHIBINO-LOVOZERO REGION

V. V. Adushkin; Адушкин В. В.; A. G. Goev; Гоев А. Г.

doi:10.31857/S2686739723601527

IMPRINTS OF PLUME PROCESSES IN THE MODERN LITHOSPHERIC VELOCITY STRUCTURE OF THE KHIBINO-LOVOZERO REGION

Authors: Adushkin V.V.¹, Goev A.G.¹
Affiliations:
1. Sadovskiy Institute of Geosphere Dynamics Russian Academy of Sciences
Issue: Vol 513, No 1 (2023)
Pages: 106-111
Section: GEODYNAMICS
Submitted: 30.01.2025
Published: 01.11.2023
URL: https://rjmseer.com/2686-7397/article/view/649794
DOI: https://doi.org/10.31857/S2686739723601527
EDN: https://elibrary.ru/LMCMEG
ID: 649794

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Abstract

The paper presents new deep velocity of the earth’s crust and upper mantle in the Khibiny-Lovozero tectonic region located on the Kola Peninsula. The artifacts of plume-lithospheric interactions that occurred in the investigated area from the Proterozoic to the Paleozoic time are discussed. A detailed comparison of the velocity structure of the Imandra-Varzug rift, the Khibiny and Lovozero plutons, and the adjacent Archean part of the Fennoscandinavian Shield has been carried out. A significant heterogeneity of the structure of the crust, upper mantle, as well as the structure and depth of the crust-mantle transition is shown. The presence of a zone of low seismic velocities in the upper mantle associated with the mid-lithospheric discontinuity (MLD) has been revealed. Structural features of the Moho zone and the upper mantle in the region of the Khibiny and Lovozero plutons were interpreted as artifacts of the plume process.

Keywords

Kola region, receiver functions, shear waves, upper mantle, plume, mid-lithospheric discontinuity

About the authors

V. V. Adushkin

Sadovskiy Institute of Geosphere Dynamics Russian Academy of Sciences

Email: andr.goev@gmail.com
Russian Federation, Moscow

A. G. Goev

Sadovskiy Institute of Geosphere Dynamics Russian Academy of Sciences

Author for correspondence.
Email: andr.goev@gmail.com
Russian Federation, Moscow

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