A lithosphere-scale structural model of the Barents Sea and Kara Sea region
We introduce a regional 3-D structural model of the Barents Sea and Kara Sea region which is the first to combine information on the sediments and the crystalline crust as well as the configuration of the lithospheric mantle. Therefore, we have integrated all available geological and geophysical dat...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-02-01
|
| Series: | Solid Earth |
| Online Access: | http://www.solid-earth.net/6/153/2015/se-6-153-2015.pdf |
| _version_ | 1819110699258871808 |
|---|---|
| author | P. Klitzke J. I. Faleide M. Scheck-Wenderoth J. Sippel |
| author_facet | P. Klitzke J. I. Faleide M. Scheck-Wenderoth J. Sippel |
| author_sort | P. Klitzke |
| collection | DOAJ |
| description | We introduce a regional 3-D structural model of the Barents Sea and Kara Sea
region which is the first to combine information on the sediments and the
crystalline crust as well as the configuration of the lithospheric mantle.
Therefore, we have integrated all available geological and geophysical data,
including interpreted seismic refraction and reflection data, seismological
data, geological maps and previously published 3-D models into one consistent
model. This model resolves four major megasequence boundaries (earliest
Eocene, mid-Cretaceous, mid-Jurassic and mid-Permian) the top crystalline
crust, the Moho and a newly calculated lithosphere–asthenosphere boundary
(LAB). The thickness distributions of the corresponding main megasequences
delineate five major subdomains (the northern Kara Sea, the southern Kara
Sea, the eastern Barents Sea, the western Barents Sea and the oceanic domain
comprising the Norwegian–Greenland Sea and the Eurasia Basin). Relating the
subsidence histories of these subdomains to the structure of the deeper crust
and lithosphere sheds new light on possible causative basin forming
mechanisms that we discuss.
<br><br>
The depth configuration of the newly calculated LAB and the seismic velocity
configuration of the upper mantle correlate with the younger history of this
region. The western Barents Sea is underlain by a thinned lithosphere
(80 km) resulting from multiple Phanerozoic rifting phases and/or
the opening of the NE Atlantic from Paleocene/Eocene times on. Notably, the
northwestern Barents Sea and Svalbard are underlain by thinnest continental
lithosphere (60 km) and a low-velocity/hot upper mantle that
correlates spatially with a region where late Cenozoic uplift was strongest.
As opposed to this, the eastern Barents Sea is underlain by a thicker
lithosphere (~ 110–150 km) and a high-velocity/density anomaly
in the lithospheric mantle. This anomaly, in turn, correlates with an area
where only little late Cenozoic uplift/erosion was observed. |
| first_indexed | 2024-12-22T03:45:52Z |
| format | Article |
| id | doaj.art-ce88a72f04ef421598c73c750c13d667 |
| institution | Directory Open Access Journal |
| issn | 1869-9510 1869-9529 |
| language | English |
| last_indexed | 2024-12-22T03:45:52Z |
| publishDate | 2015-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Solid Earth |
| spelling | doaj.art-ce88a72f04ef421598c73c750c13d6672022-12-21T18:40:09ZengCopernicus PublicationsSolid Earth1869-95101869-95292015-02-016115317210.5194/se-6-153-2015A lithosphere-scale structural model of the Barents Sea and Kara Sea regionP. Klitzke0J. I. Faleide1M. Scheck-Wenderoth2J. Sippel3Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, GermanyDepartment of Geosciences, University of Oslo, Oslo, NorwayHelmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, GermanyHelmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, GermanyWe introduce a regional 3-D structural model of the Barents Sea and Kara Sea region which is the first to combine information on the sediments and the crystalline crust as well as the configuration of the lithospheric mantle. Therefore, we have integrated all available geological and geophysical data, including interpreted seismic refraction and reflection data, seismological data, geological maps and previously published 3-D models into one consistent model. This model resolves four major megasequence boundaries (earliest Eocene, mid-Cretaceous, mid-Jurassic and mid-Permian) the top crystalline crust, the Moho and a newly calculated lithosphere–asthenosphere boundary (LAB). The thickness distributions of the corresponding main megasequences delineate five major subdomains (the northern Kara Sea, the southern Kara Sea, the eastern Barents Sea, the western Barents Sea and the oceanic domain comprising the Norwegian–Greenland Sea and the Eurasia Basin). Relating the subsidence histories of these subdomains to the structure of the deeper crust and lithosphere sheds new light on possible causative basin forming mechanisms that we discuss. <br><br> The depth configuration of the newly calculated LAB and the seismic velocity configuration of the upper mantle correlate with the younger history of this region. The western Barents Sea is underlain by a thinned lithosphere (80 km) resulting from multiple Phanerozoic rifting phases and/or the opening of the NE Atlantic from Paleocene/Eocene times on. Notably, the northwestern Barents Sea and Svalbard are underlain by thinnest continental lithosphere (60 km) and a low-velocity/hot upper mantle that correlates spatially with a region where late Cenozoic uplift was strongest. As opposed to this, the eastern Barents Sea is underlain by a thicker lithosphere (~ 110–150 km) and a high-velocity/density anomaly in the lithospheric mantle. This anomaly, in turn, correlates with an area where only little late Cenozoic uplift/erosion was observed.http://www.solid-earth.net/6/153/2015/se-6-153-2015.pdf |
| spellingShingle | P. Klitzke J. I. Faleide M. Scheck-Wenderoth J. Sippel A lithosphere-scale structural model of the Barents Sea and Kara Sea region Solid Earth |
| title | A lithosphere-scale structural model of the Barents Sea and Kara Sea region |
| title_full | A lithosphere-scale structural model of the Barents Sea and Kara Sea region |
| title_fullStr | A lithosphere-scale structural model of the Barents Sea and Kara Sea region |
| title_full_unstemmed | A lithosphere-scale structural model of the Barents Sea and Kara Sea region |
| title_short | A lithosphere-scale structural model of the Barents Sea and Kara Sea region |
| title_sort | lithosphere scale structural model of the barents sea and kara sea region |
| url | http://www.solid-earth.net/6/153/2015/se-6-153-2015.pdf |
| work_keys_str_mv | AT pklitzke alithospherescalestructuralmodelofthebarentsseaandkarasearegion AT jifaleide alithospherescalestructuralmodelofthebarentsseaandkarasearegion AT mscheckwenderoth alithospherescalestructuralmodelofthebarentsseaandkarasearegion AT jsippel alithospherescalestructuralmodelofthebarentsseaandkarasearegion AT pklitzke lithospherescalestructuralmodelofthebarentsseaandkarasearegion AT jifaleide lithospherescalestructuralmodelofthebarentsseaandkarasearegion AT mscheckwenderoth lithospherescalestructuralmodelofthebarentsseaandkarasearegion AT jsippel lithospherescalestructuralmodelofthebarentsseaandkarasearegion |