10.14470/3O7561738646
Geissler, Wolfram
Wolfram
Geissler
https://orcid.org/0000-0001-6807-555X
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Shibaev, Sergey
Sergey
Shibaev
https://orcid.org/0000-0001-6236-5062
Yakutsk Branch Federal Research Centre Geophysical Survey, Russian Academy of Sciences, Yakutia, Russian Federation
Krüger, Frank
Frank
Krüger
University of Potsdam, Potsdam, Germany
Baranov, Boris
Boris
Baranov
https://orcid.org/0000-0002-1965-320X
P.P. Shirshov Institute of Oceanology of the Russian Academy of Sciences, Moscow, Russian Federation
Haberland, Christian
Christian
Haberland
https://orcid.org/0000-0002-2981-7087
GFZ German Research Centre for Geoscience Helmholtz Centre Potsdam, Potsdam, Germany
Tsukanov, Nikolai
Nikolai
Tsukanov
P.P. Shirshov Institute of Oceanology of the Russian Academy of Sciences, Moscow, Russian Federation
Ploetz, Aline
Aline
Ploetz
https://orcid.org/0000-0001-7555-8701
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Vollmer, Daniel
Daniel
Vollmer
https://orcid.org/0000-0002-5035-3395
University of Potsdam, Potsdam, Germany
Pravkin, Sergey
Sergey
Pravkin
https://orcid.org/0000-0002-0424-9618
Arctic and Antarctic Research Institute, St. Petersburg, Russian Federation
Laptev Sea Rift Seismological Network (SIOLA) Part I
GFZ Data Services
2020
Seismic Network
Broadband seismic waveforms
Seismic monitoring
temporary local seismic network
Arctic
Siberia
continental rifting
Laptev Sea
Siberian Craton
Verkhoyansk Fold-and-Thrust Belt
Monitoring system
EARTH SCIENCE > SOLID EARTH
In Situ/Laboratory Instruments > Magnetic/Motion Sensors > Seismometers
In Situ Land-based Platforms > GEOPHYSICAL STATIONS/NETWORKS
In Situ Land-based Platforms > GEOPHYSICAL STATIONS/NETWORKS > SEISMOLOGICAL STATIONS
Deutsches GeoForschungsZentrum GFZ
GEOFON Data Centre
Geofon@Gfz-Potsdam.De
Geophysical Instrument Pool Potsdam (GIPP)
Polar, Alfred Wegener Institute Helmholtz Centre For
Alfred Wegener Institute Helmholtz Centre For
Polar
Yakutsk Branch Federal Research Centre Geophysical Survey, Russian Academy Of Sciences
Russian Academy Of Sciences
Yakutsk Branch Federal Research Centre Geophysical Survey
University Of Potsdam, Potsdam
Potsdam
University Of Potsdam
P.P. Shirshov Institute Of Oceanology Of The Russian Academy Of Sciences, Moscow
Moscow
P.P. Shirshov Institute Of Oceanology Of The Russian Academy Of Sciences
GFZ German Research Centre For Geoscience Helmholtz Centre Potsdam, Potsdam
Potsdam
GFZ German Research Centre For Geoscience Helmholtz Centre Potsdam
, Arctic
Arctic
2016-04-01
2020-01-01
2021-01-27
2026-01-01
2020
en
10.2312/bzpm_0709_2017
10.2312/bzpm_0725_2018
https://geofon.gfz-potsdam.de/waveform/archive/response/8B/2016_2017
~200G
.mseed
XML
embargoed access
Creative Commons Attribution 4.0 International
The Laptev Sea region is one of the very few places on Earth where mid-ocean spreading centres continue into continental rift zones. The Gakkel Ridge, the active spreading centre in the Eurasia Basin of the Arctic Ocean, is characterized by well-defined seismicity close to its axial graben. In contrast below the Laptev Sea Shelf, which consists of a series of sediment filled grabens (500 km wide, 700 km long), only more diffuse seismic activity is observed. The pre-rift basement in the Laptev Sea is most probably formed by Late-Paleozoic and Late-Mesozoic fold belts. The Laptev Rift Basin is filled with Upper Cretaceous and Cenozoic sediments of variable thickness (1.5 to 14 km). The westernmost limit of seismicity is located close to edge of thick lithosphere of the Siberian Shield, which indicates some structural control on the recent tectonic activity. Focal depths are mainly less than 25 km (continent) and less than 10 km (ocean). Sparse observations of upper mantle earthquakes are under debate. The pole of rotation is very close to the study area, most probably to the south of Lena delta. Existing data indicate changes between compressional and extensional tectonic phases over short distances. This might be a consequence of the fact that the pole of rotation is close to our study area. The Khatanga-Lomonosov Shear Zone marks the border between the Gakkel Ridge and Laptev Sea Rift System, but its nature and extent are debated. Crustal extension seems to be concentrated in the eastern Laptev Sea area. Fault plane solutions are sparse and mostly not well determined to describe the movements in greater detail. Thus, with this project we intend to investigate details on tectonic movements in the Laptev Sea to better describe this amagmatic rifting and its consequences in an Arctic and global context. In general, we intend to increase the number of seismological stations for monitoring local earthquakes in the Laptev Sea/Lena delta region to fulfil the following objectives: (1) Location of microseismicity and its relationship with active faults. We want to identify seismologically active faults zones. In a first step we like to deploy instruments in earthquake areas, which are already identified by the global seismological network, though with low spatial resolution.(2) Focal mechanisms. What is the present geodynamic setting, where is extension and where is compression in the Laptev Sea and in the Lena delta region, where is the exact pole of rotation? What is the relation of the recent seismicity to pre-existing crustal and lithosphere structures (e.g., western Verkhoyansk Fold-and-Thrust Belt/Olenek Zone or South Anyui Suture)?(3) Lithosphere structure. It is interesting to note that despite the Cenozoic continental rifting in the Laptev Sea little volcanism is known. Thus, we like to compare the deep crustal and upper mantle structure with other continental rift systems (e.g. Afar) to enhance our understanding on the driving forces. The experiment is planned as a combination of stationary array(s) and moving small networks. Small networks are planned to operate for 1-2 years at one location before it will be moved to another. Waveform data are available from the GEOFON data centre, under network code 8B and will be embargoed until January 2026.
100.0
160.0
80.0
67.5
Siberia
Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum GFZ
https://doi.org/10.13039/501100010956
GIPP201605