Upper crustal seismic structure of the Mazury complex and Mazowsze massif within East European Craton in NE Poland

Czuba, Wojciech; Grad, M.; Luosto, U.; Motuza, Gediminas; Nasedkin, V. V.

doi:10.1016/s0040-1951(02)00352-9

Cited by 29 publications

(25 citation statements)

References 8 publications

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“…The projects provided sufficient information about the crustal structure around the area, which was used to compile some precise 3-D crustal models (e.g., Majdanski, 2012). Using data of the DSS projects, the EUROBRIDGE Working Group (1999), Czuba et al (2001), Yliniemi et al (2004), Grad et al (2002) and Thybo et al (2003) found some reflectors in the upper mantle just beneath the Moho going down to 75 km in Fennoscandia, which could be related to different crustal units. Similar subhorizontal lithospheric reflectors were observed beneath the TESZ Guterch et al, 2004) and the Baltic Sea (Hansen and Balling, 2004).…”

Section: Review Of Previous Studiesmentioning

confidence: 99%

Upper mantle structure around the Trans-European Suture Zone obtained by teleseismic tomography

et al. 2015

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Abstract. The presented study aims to resolve the upper mantle structure around the Trans-European Suture Zone (TESZ), which is the major tectonic boundary in Europe. The data of 183 temporary and permanent seismic stations operated during the period of the PASsive Seismic Experiment (PASSEQ) 2006-2008 within the study area from Germany to Lithuania was used to compile the data set of manually picked 6008 top-quality arrivals of P waves from teleseismic earthquakes. We used the TELINV nonlinear teleseismic tomography algorithm to perform the inversions. As a result, we obtain a model of P wave velocity variations up to about ±3 % with respect to the IASP91 velocity model in the upper mantle around the TESZ. The higher velocities to the east of the TESZ correspond to the older East European Craton (EEC), while the lower velocities to the west of the TESZ correspond to younger western Europe. We find that the seismic lithosphere-asthenosphere boundary (LAB) is more distinct beneath the Phanerozoic part of Europe than beneath the Precambrian part. To the west of the TESZ beneath the eastern part of the Bohemian Massif, the Sudetes Mountains and the Eger Rift, the negative anomalies are observed from a depth of at least 70 km, while under the Variscides the average depth of the seismic LAB is about 100 km. We do not observe the seismic LAB beneath the EEC, but beneath Lithuania we find the thickest lithosphere of about 300 km or more. Beneath the TESZ, the asthenosphere is at a depth of 150-180 km, which is an intermediate value between that of the EEC and western Europe. The results imply that the seismic LAB in the northern part of the TESZ is in the shape of a ramp dipping to the northeasterly direction. In the southern part of the TESZ, the LAB is shallower, most probably due to younger tectonic settings. In the northern part of the TESZ we do not recognize any clear contact between Phanerozoic and Proterozoic Europe, but further to the south we may refer to a sharp and steep contact on the eastern edge of the TESZ. Moreover, beneath Lithuania at depths of 120-150 km, we observe the lower velocity area following the boundary of the proposed paleosubduction zone.

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Section: Review Of Previous Studiesmentioning

confidence: 99%

Upper mantle structure around the Trans-European Suture Zone obtained by teleseismic tomography

et al. 2015

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“…Some steep changes in the Moho depths and the seismic velocities along some of the profiles were reported. For example, a "step" with the increase in the Moho depth from 42 to 44 km (which is comparable to the resolution of the method) was found at the P5 profile between the Mazury Complex and the Mazowsze Massif (Czuba et al, 2001). Dadlez et al (2005) summarized that not all Moho "steps" occur exactly at the places of the proposed terrain boundaries.…”

Section: Crustal Units In Polandmentioning

confidence: 68%

“…Models of the crust and the uppermost mantle along the EUROBRIDGE transect (EB'94 and EB'96), the POLONAISE'97 profiles P4 (northern part), P5 andP3, andCELEBRATION 2000 profile CEL05 (after Grad et al, 2006). Values of the P -wave velocities are given in kilometres per second.…”

Section: Janutyte Et Al: Traces Of the Crustal Units And The Uppementioning

confidence: 99%

“…The results obtained during the POLONAISE'97 (Guterch et al, 1999) and CELEBRATION 2000 DSS projects provided detailed models of the crust and the upper-mantle structure in Poland (e.g. Czuba et al, 2001;Malinowski et al, 2008). The westernmost part of the EEC adjoining the TESZ has thick continental crust of average thickness of 40-50 km .…”

Section: Crustal Units In Polandmentioning

confidence: 99%

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Traces of the crustal units and the upper-mantle structure in the southwestern part of the East European Craton

et al. 2014

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Abstract. The presented study is a part of the passive seismic experiment PASSEQ 2006-2008, which took place around the Trans-European Suture Zone (TESZ) from May 2006 to June 2008. The data set of 4195 manually picked arrivals of teleseismic P waves of 101 earthquakes (EQs) recorded in the seismic stations deployed to the east of the TESZ was inverted using the non-linear teleseismic tomography algorithm TELINV. Two 3-D crustal models were used to estimate the crustal travel time (TT) corrections. As a result, we obtain a model of P -wave velocity variations in the upper mantle beneath the TESZ and the East European Craton (EEC). In the study area beneath the craton, we observe up to 3 % higher and beneath the TESZ about 2-3 % lower seismic velocities compared to the IASP91 velocity model. We find the seismic lithosphere-asthenosphere boundary (LAB) beneath the TESZ at a depth of about 180 km, while we observe no seismic LAB beneath the EEC. The inversion results obtained with the real and the synthetic data sets indicate a ramp shape of the LAB in the northern TESZ, where we observe values of seismic velocities close to those of the craton down to about 150 km. The lithosphere thickness in the EEC increases going from the TESZ to the NE from about 180 km beneath Poland to 300 km or more beneath Lithuania. Moreover, in western Lithuania we find an indication of an uppermantle dome. In our results, the crustal units are not well resolved. There are no clear indications of the features in the upper mantle which could be related to the crustal units in the study area. On the other hand, at a depth of 120-150 km we indicate a trace of a boundary of proposed palaeosubduction zone between the East Lithuanian Domain (EL) and the West Lithuanian Granulite Domain (WLG). Also, in our results, we may have identified two anorogenic granitoid plutons.

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“…The MLSZ is traced into north east ern Po land as in di cated by a thick en ing of the crust de fined in the DSS pro files POLONAISSE P4 and P5 (Czuba et al, 2002;Grad et al, 2003). The beltiform lithological fab ric is less dis tinct in this part of the MLSZ be cause on the zone there are su per im posed large cratonic in tru sions such as those of Suwa³ki, Go³dap and Kêtrzyn, form ing a chain in an E-W di rec tion pos si bly con trolled by the large-scale fault struc ture (Wiszniewska et al, 2007).…”

Section: Mid-lithuanian Suture Zonementioning

confidence: 99%

Morphotectonic implication of the Paleoproterozoic Mid-Lithuanian Suture Zone

Šliaupa

Satkūnas

Motuza

et al. 2017

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The Paleoproterozoic Mid-Lith u a nian Su ture Zone rep re sents one of the ma jor struc tures of the crys tal line base ment of Lithu a nia, sep a rat ing the West Lith u a nian and the East Lith u a nian do mains. This zone has shown per sis tently low tec tonic ac tiv ity dur ing the Phanerozoic. The Mid-Lith u a nian Su ture Zone is marked by a dis tinct Mid dle Lith u a nian top o graphic low un der lain by a trough in the sub-Qua ter nary sur face that sug gests the morphotectonic na ture of this de pres sion. This is supported by high-pre ci sion geo detic lev el ling data that has un rav elled the sub si dence trend of the Mid dle Lith u a nian trough. The zone is also dis tinct in its pat tern of top o graphic lin ea ments. The per sis tence of the tec tonic ac tiv ity of the Mid-Lith u a nian Su ture Zone sug gests that it rep re sents a large-scale me chan i cal bound ary of the Earth's crust, re sult ing in in creased ac cumu la tion of tec tonic strain.

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Upper crustal seismic structure of the Mazury complex and Mazowsze massif within East European Craton in NE Poland

Cited by 29 publications

References 8 publications

Upper mantle structure around the Trans-European Suture Zone obtained by teleseismic tomography

Upper mantle structure around the Trans-European Suture Zone obtained by teleseismic tomography

Traces of the crustal units and the upper-mantle structure in the southwestern part of the East European Craton

Morphotectonic implication of the Paleoproterozoic Mid-Lithuanian Suture Zone

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