POLENET/LAPNET teleseismic P wave travel time tomography model of the upper mantle beneath northern Fennoscandia
The POLENET/LAPNET (Polar Earth Observing Network) broadband seismic network was deployed in northern Fennoscandia (Finland, Sweden, Norway, and Russia) during the third International Polar Year 2007–2009. The array consisted of roughly 60 seismic stations. In our study, we estimate the 3-D architec...
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ftdoajarticles:oai:doaj.org/article:f93262ecd3014c23ab7b9a4e83203e72 2023-05-15T16:11:42+02:00 POLENET/LAPNET teleseismic P wave travel time tomography model of the upper mantle beneath northern Fennoscandia H. Silvennoinen E. Kozlovskaya E. Kissling 2016-03-01T00:00:00Z https://doi.org/10.5194/se-7-425-2016 https://doaj.org/article/f93262ecd3014c23ab7b9a4e83203e72 EN eng Copernicus Publications http://www.solid-earth.net/7/425/2016/se-7-425-2016.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 1869-9510 1869-9529 doi:10.5194/se-7-425-2016 https://doaj.org/article/f93262ecd3014c23ab7b9a4e83203e72 Solid Earth, Vol 7, Iss 2, Pp 425-439 (2016) Geology QE1-996.5 Stratigraphy QE640-699 article 2016 ftdoajarticles https://doi.org/10.5194/se-7-425-2016 2022-12-31T08:59:23Z The POLENET/LAPNET (Polar Earth Observing Network) broadband seismic network was deployed in northern Fennoscandia (Finland, Sweden, Norway, and Russia) during the third International Polar Year 2007–2009. The array consisted of roughly 60 seismic stations. In our study, we estimate the 3-D architecture of the upper mantle beneath the northern Fennoscandian Shield using high-resolution teleseismic P wave tomography. The P wave tomography method can complement previous studies in the area by efficiently mapping lateral velocity variations in the mantle. For this purpose 111 clearly recorded teleseismic events were selected and the data from the stations hand-picked and analysed. Our study reveals a highly heterogeneous lithospheric mantle beneath the northern Fennoscandian Shield though without any large high P wave velocity area that may indicate the presence of thick depleted lithospheric “keel”. The most significant feature seen in the velocity model is a large elongated negative velocity anomaly (up to −3.5 %) in depth range 100–150 km in the central part of our study area that can be followed down to a depth of 200 km in some local areas. This low-velocity area separates three high-velocity regions corresponding to the cratonic units forming the area. Article in Journal/Newspaper Fennoscandia Fennoscandian International Polar Year Directory of Open Access Journals: DOAJ Articles Norway Solid Earth 7 2 425 439 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 Stratigraphy QE640-699 |
spellingShingle |
Geology QE1-996.5 Stratigraphy QE640-699 H. Silvennoinen E. Kozlovskaya E. Kissling POLENET/LAPNET teleseismic P wave travel time tomography model of the upper mantle beneath northern Fennoscandia |
topic_facet |
Geology QE1-996.5 Stratigraphy QE640-699 |
description |
The POLENET/LAPNET (Polar Earth Observing Network) broadband seismic network was deployed in northern Fennoscandia (Finland, Sweden, Norway, and Russia) during the third International Polar Year 2007–2009. The array consisted of roughly 60 seismic stations. In our study, we estimate the 3-D architecture of the upper mantle beneath the northern Fennoscandian Shield using high-resolution teleseismic P wave tomography. The P wave tomography method can complement previous studies in the area by efficiently mapping lateral velocity variations in the mantle. For this purpose 111 clearly recorded teleseismic events were selected and the data from the stations hand-picked and analysed. Our study reveals a highly heterogeneous lithospheric mantle beneath the northern Fennoscandian Shield though without any large high P wave velocity area that may indicate the presence of thick depleted lithospheric “keel”. The most significant feature seen in the velocity model is a large elongated negative velocity anomaly (up to −3.5 %) in depth range 100–150 km in the central part of our study area that can be followed down to a depth of 200 km in some local areas. This low-velocity area separates three high-velocity regions corresponding to the cratonic units forming the area. |
format |
Article in Journal/Newspaper |
author |
H. Silvennoinen E. Kozlovskaya E. Kissling |
author_facet |
H. Silvennoinen E. Kozlovskaya E. Kissling |
author_sort |
H. Silvennoinen |
title |
POLENET/LAPNET teleseismic P wave travel time tomography model of the upper mantle beneath northern Fennoscandia |
title_short |
POLENET/LAPNET teleseismic P wave travel time tomography model of the upper mantle beneath northern Fennoscandia |
title_full |
POLENET/LAPNET teleseismic P wave travel time tomography model of the upper mantle beneath northern Fennoscandia |
title_fullStr |
POLENET/LAPNET teleseismic P wave travel time tomography model of the upper mantle beneath northern Fennoscandia |
title_full_unstemmed |
POLENET/LAPNET teleseismic P wave travel time tomography model of the upper mantle beneath northern Fennoscandia |
title_sort |
polenet/lapnet teleseismic p wave travel time tomography model of the upper mantle beneath northern fennoscandia |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/se-7-425-2016 https://doaj.org/article/f93262ecd3014c23ab7b9a4e83203e72 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Fennoscandia Fennoscandian International Polar Year |
genre_facet |
Fennoscandia Fennoscandian International Polar Year |
op_source |
Solid Earth, Vol 7, Iss 2, Pp 425-439 (2016) |
op_relation |
http://www.solid-earth.net/7/425/2016/se-7-425-2016.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 1869-9510 1869-9529 doi:10.5194/se-7-425-2016 https://doaj.org/article/f93262ecd3014c23ab7b9a4e83203e72 |
op_doi |
https://doi.org/10.5194/se-7-425-2016 |
container_title |
Solid Earth |
container_volume |
7 |
container_issue |
2 |
container_start_page |
425 |
op_container_end_page |
439 |
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1765996873289564160 |