Applying seismic cutoff depth in thermal modelling of the Fennoscandian Shield

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Sammanfattning

This study presents an analysis of seismic cutoff depth and heat flow field of the Fennoscandian Shield. Altogether 4190 earthquake events from years 2000-2015 in Finnish and Swedish national catalogues have been applied for this purpose. To model the heat flow field, 223 values from both countries and their neighbouring areas were used to find out if any correlation between the maximum earthquake focal depth (cutoff depth) and surface heat flow exists. Because heat flow and cutoff depth appear unrelated, it seems evident that regional variations of heat flow are caused by shallow lying variations (i.e., in upper crust) in heat production instead of deeper sources. Therefore one-dimensional layer models with temperature-dependent thermal conductivity are functional for the shield area.
Originalspråkengelska
Titel på värdpublikationLithosphere 2016 : Ninth Symposium on the Structure, Composition and Evolution of the Lithosphere in Fennoscandia Programme and Extended Abstracts
RedaktörerIlmo Kukkonen ... [et al.]
Antal sidor4
UtgivningsortHelsinki
FörlagInstitute of Seismology, University of Helsinki
Utgivningsdatum2016
Sidor149-152
ISBN (tryckt)978-952-10-5081-7
ISBN (elektroniskt)978-952-10-9282-5
StatusPublicerad - 2016
MoE-publikationstypB3 Ej refererad artikel i konferenshandlingar
EvenemangLitosphere Symposium - Espoo, Finland
Varaktighet: 9 nov. 201611 nov. 2016
Konferensnummer: 9

Publikationsserier

NamnReport. S
FörlagUniversity of Helsinki, Institute of Seismology
Nummer65
ISSN (tryckt)0357-3060

Vetenskapsgrenar

  • 1171 Geovetenskaper

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