English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

New data about seismicity and crustal velocity structure of the “continent-ocean” transition zone of the Barents-Kara region in the Arctic

Authors

Morozov,  Alexey N.
External Organizations;
GEOFON, Deutsches GeoForschungsZentrum;

Vaganova,  Natalya V.
External Organizations;
GEOFON, Deutsches GeoForschungsZentrum;

Konechnaya,  Yana V.
External Organizations;
GEOFON, Deutsches GeoForschungsZentrum;

Asming,  Vladimir E.
External Organizations;
GEOFON, Deutsches GeoForschungsZentrum;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in GFZpublic
Supplementary Material (public)
There is no public supplementary material available
Citation

Morozov, A. N., Vaganova, N. V., Konechnaya, Y. V., Asming, V. E. (2015): New data about seismicity and crustal velocity structure of the “continent-ocean” transition zone of the Barents-Kara region in the Arctic. - Journal of Seismology, 19, 1, 219-230.
https://doi.org/10.1007/s10950-014-9462-z


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_3178896
Abstract
The recent (2011) installation of seismic station Zemlya Franca-Iocifa (ZFI) on Alexander Island in the Franz Josef Land Archipelago allows new seismic monitoring of the “continent-ocean” transition zone of the Barents-Kara Sea region. The region is seismically active, and we hypothesize that the prevailing geodynamic factor responsible for the occurrence of weak earthquakes is isostatic compensation of avalanche sedimentation in the “continent-ocean” transition zone. The crustal velocity structure beneath ZFI was determined using receiver functions. Crustal thickness is 30 km, based on an observed Moho discontinuity with underlying mantle velocities being Vp = 8.15 km/s and Vs = 4.5 km/s The model indicates a mid-crustal boundary at a depth of about 17 km with a velocity contrast between the upper (Vp = 6.1 km/s, Vs = 3.6 km/s) and lower (Vp = 6.8 km/s, Vs = 3.9 km/s) layers. In addition, the upper crustal sedimentary layer is about 4 km thick with Vp = 4.3 km/s and Vs = 2.36 km/s.