Lithospheric structure of the Bohemian Massif and adjacent Variscan belt in central Europe based on profile S01 from the SUDETES 2003 experiment

Grad, M.; Guterch, A.; Mazur, Stanisław; Keller, G. Randy; Špičák, Aleš; Hrubcová, Pavla; Geissler, Wolfram

doi:10.1029/2007jb005497

Cited by 81 publications

(74 citation statements)

References 99 publications

(168 reference statements)

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“…In the re main ing area, the basement top lies much deeper than 5 km, and con se quently it can be in ves ti gated only us ing geo phys i cal tech niques and/or extrap o la tions from the well-stud ied ar eas. In this re gard, the princi pal ap proach ap plied in many pre vi ous stud ies and fol lowed by the pres ent au thors re lies on in ter pre ta tion of mod ern WARR pro ject re sults: from the LT-7 pro file (Guterch et al, 1994), POLONAISE'97 (Guterch et al, 1999;Janik et al, 2002) to CELEBRATION 2000 Janik et al, 2009;Narkiewicz et al, 2011) and SUDETES (Majdañski et al, 2006(Majdañski et al, , 2007Grad et al, 2008). More over the re sults of the earlier LT ex per i ments have been partly re pro cessed and re in terpreted .…”

Section: Methodsmentioning

confidence: 98%

“…In par tic u lar it in cludes a high-ve loc ity lower crust (Vp ³6.8 km/s) ex tend ing to the SW of the Dolsk Fault, reach ing as far as the Sudetic Bound ary Fault in the SUDETES S03 proBasement structure of the Paleozoic Platform in Poland 507 file and even be low the en tire Pol ish Sudetes area in the S01 and S02 pro files (Fig. 5;Majdañski et al, 2006;Grad et al, 2008). It seems prob a ble that this Vp pat tern re flects the complex crustal struc ture of the Variscan collisional zone and its later his tory.…”

Section: Sudetic Domainmentioning

confidence: 98%

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Basement structure of the Paleozoic Platform in Poland

Narkiewicz

Petecki

2017

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1 Pol ish Geo log i cal In sti tute -Na tional Re search In sti tute, Rakowiecka 4, 00-975 Warszawa, Po land Narkiewicz, M., Petecki, Z., 2017. Base ment struc ture of the Pa leo zoic Plat form in Po land. Geo log i cal Quar terly, 61 (2): 502-520, doi: 10.7306/gq.XXXX The Pa leo zoic Plat form com prises the south west ern half of the Pol ish ter ri tory, sep a rated from the Pre cam brian East Eu ropean Plat form (EEP) by a NW-SE trending subvertical lithospheric-scale dis con ti nu ity -the Teisseyre-Tornquist Zone. In the pres ent study, the Pa leo zoic Plat form base ment is sub di vided based on geo log i cal and geo phys i cal ev i dence ac quired dur ing the last de cades, in clud ing deep seis mic re frac tion and re flec tion re sults, as well as grav ity, mag netic and magnetotelluric data. The units ad ja cent to the EEP, the Mid-Pol ish Do main (com pris ing the £ysogóry Block) and the Pom era nian Block, are char ac ter ized by a thinned three-layer EEP-type crys tal line crust (age 1.7-3.7 Gy). Their old est plat form cover is prob a bly com posed of thick Ediacaran syn-rift sed i men tary and vol ca nic rocks. Their west ern ex ten sion in the contig u ous Ger man and Bal tic area can be traced as far as the East Elbian Mas sif and Thor Su ture based mainly on mag netic anom aly pat terns. The Up per Silesian and Ma³opolska blocks lo cated in SE Po land are char ac ter ized by Cadomian (660-600 My) base ment over lain by the thick de formed Ediacaran foredeep de pos its. Whereas the units with the EEP-type base ment are in ter preted as prox i mal ter ranes dis placed along the EEP mar gin dur ing the late Early Pa leo zoic, the blocks with a Cadomian base ment are con ceived as ex otic ter ranes of a pos si ble Gondwanan prov e nance. All these ter ranes were accreted ul ti mately dur ing the fi nal, lat est Si lu rian stages of the Cal edo nian de for ma tion al though the ex act sce nario of the amal gam ation re mains hy po thet i cal. The Sudetic Do main in SW Po land is a col lage of dif fer ent crustal units jux ta posed ul timately in the Penn syl va nian (ca. 310 Ma) dur ing the fi nal ep i sodes of the Variscan Orog eny. Their north ern bound ary cor responds to the Rheic Su ture trace able in mag netic and grav ity anom a lies pat tern along the north ern mar gin of the Wolsztyn-Leszno High, and con tin u ing west wards along the Mid-Ger man Crys tal line High. The ar cu ate trace of the su ture in the NE is dextrally dis placed along the Odra Fault, and con tin ues south wards where it is mapped as the Moravian-Silesian Su ture.

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Section: Methodsmentioning

confidence: 98%

Section: Sudetic Domainmentioning

confidence: 98%

Basement structure of the Paleozoic Platform in Poland

Narkiewicz

Petecki

2017

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“…As presented by GRAD et al (2008), a 30 km thick crust with some complicated bodies in the upper crust were derived This model was rebuilt using the previously described gridding technique and is presented in Fig. 3a.…”

Section: Application Of the Methodsmentioning

confidence: 99%

“…This problem in difficult for the results of forward modelling and most often is addressed by showing the ray coverage. More detailed analysis presents some examples of the single parameter tests, for example, by GRAD et al (2008) or JANIK et al (2002 describing the uncertainty for velocities as ±0.1 km/s and depth of interfaces as ±2 km. This approach to error is too simple, especially in cases of complicated, multi layered models.…”

Section: Introductionmentioning

confidence: 99%

The Uncertainty of 2D Models Along Wide Angle Seismic Profiles

Majdański

Polkowski

2014

Pure Appl. Geophys.

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Abstract-The estimation of uncertainty for any geophysical model is important for determining how reliable the model is. It is especially important for subjective trial and error modelling techniques like forward ray-tracing modelling of wide-angle seismic data when the final result is very dependent on the interpreter's knowledge of the area and experience. In this kind of modelling, it is common to encounter over interpretation of the seismic data without checking the uncertainty of the result, especially in the deep parts that are not constrained with other a priori knowledge. In this paper, we propose a method of estimating the uncertainty of the final models based on a one dimensional method of small error propagation generalized for 2D profiles. With a simple approximation, we estimate the uncertainty for published interpretative models of selected profiles from seismic experiments in the Central Europe. We conclude that for typical wide angle seismic profiles we can reliably interpret four layered models of the Earth's crust based on traveltimes fitting. We also show how the number of layers influence obtained uncertainties. Estimated uncertainties for both the velocity fields and the boundaries between layers are important for future tectonic and geodynamic interpretation of those profiles.

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“…Our knowledge of the crust beneath the complex structural mosaic of the Central European Variscides (fragmentarily exposed, e.g., in the Polish Sudetes at the NE edge of the Bohemian Massif) is based mainly on geophysical data, in particular those gained by the recent seismic experiment SUDETES 2003 [1][2][3]. However, the geophysical data do not provide direct information about the rock types underlying mostly allochthonous units, nor about their origin and ages.…”

Section: Introductionmentioning

confidence: 99%

The crust beneath the Polish Sudetes: evidence from a gneiss xenolith in Tertiary basanite from Paszowice

Oberc-Dziedzic

Kryza

2009

Geodinamica Acta

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Xenoliths found in basaltic lavas provide useful information about the materials of the Earth crust and mantle sampled by the lava on its way to the surface, and they help to extend our interpretations based on geophysical data. A garnet-biotite-hornblende-gneiss xenolith (min. ca. 40 cm across) was drilled at a depth of ca. 18 m in a Tertiary basanite flow at Paszowice village near Jawor, in the easternmost part of the Kaczawa Mountains, central Sudetes (SW Poland). Based on petrography, geochemistry and thermobarometry, the xenolith is interpreted to have been formed at deep crustal levels from a metasedimentary rock. The maximum PT conditions recorded in the gneiss (T 700-740 o C, P ca. 10 kbar) indicate that the main metamorphic event took place at a depth of 25-30 km, thus corresponding to the present-day lower crustal level defined on geophysical constraints. The gneiss xenolith contains four zircon populations, as revealed by U-Pb SHRIMP analyses: (1) 1.7 -2.1 Ga, (2) 547 -623 Ma, (3) 473 -494 Ma, and (4) 354 -437 Ma. The zircons of the youngest group (4) are interpreted to have originated during a metamorphic episode, at ca. 374±13 Ma, corresponding well with the HT-MP major metamorphic event in the neighboring Góry Sowie gneisses and migmatites. A range of features (e.g. the good preservation of the xenolith, lack of significant chemical and thermal interaction with the lava) suggest that the gneiss was sampled by the rising lava on the final path of the magma to the surface, probably from a depth of less than ca. 10 km. That means that the upper crust below this region (underlying the low-grade metamorphic Kaczawa Complex) contains gneisses originally derived from deep-crustal levels, and similar to those locally exposed in the neighborhood (e.g. in the Góry Sowie Massif to the south-east). This interpretation extends our knowledge about the structure and composition of the crust in the eastern part of the European Variscides, which otherwise is inferred only from geophysical data.

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Lithospheric structure of the Bohemian Massif and adjacent Variscan belt in central Europe based on profile S01 from the SUDETES 2003 experiment

Cited by 81 publications

References 99 publications

Basement structure of the Paleozoic Platform in Poland

Basement structure of the Paleozoic Platform in Poland

The Uncertainty of 2D Models Along Wide Angle Seismic Profiles

The crust beneath the Polish Sudetes: evidence from a gneiss xenolith in Tertiary basanite from Paszowice

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