Structure of a diffuse suture between Fennoscandia and Sarmatia in SE Poland based on interpretation of regional reflection seismic profiles supported by unsupervised clustering

Mężyk, Miłosz; Malinowski, M.; Mazur, Stanisław

doi:10.1016/j.precamres.2021.106176

Cited by 6 publications

(10 citation statements)

References 49 publications

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“…Geochronological data indicated that the vast areas of the continental crust between the Central Belarus Suture Zone and the Kola-Karelian craton (the core of Fennoscandia) did not yet exist at the time when the Central Belarus Suture Zone formed. The belonging of the Central Belarus Suture Zone to Sarmatia has been supported by the results of geological [80] and geophysical [81] studies.…”

Section: The Possible Protolith Of the Eclogitesmentioning

confidence: 70%

U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform

Shumlyanskyy

Tsymbal²,

Kusiak

et al. 2021

Geosciences

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The results of a laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb dating and a Hf isotope study of zircon crystals separated from small eclogite xenoliths found in Devonian kimberlites within the Prypyat horst, Ukraine, have been reported. The studied area is located in the junction zone between the Sarmatian and Fennoscandian segments of the East European Platform. Four laser ablation sites on two zircon grains yielded Paleoproterozoic U–Pb ages between 1954 ± 24 and 1735 ± 54 Ma. In contrast, three of four Hf sites revealed negative εHf values and Paleoarchean to Mesoarchean model ages, excluding the possibility that the eclogite xenoliths represented segments of a juvenile Paleoproterozoic subducted slab or younger mafic melts crystallized in the subcontinental lithospheric mantle. A single laser ablation Hf spot yielded a positive εHf value (+3) and a Paleoproterozoic model age. Two models for eclogite origin can be proposed. The first foresees the extension of the Archean lower-crustal or lithospheric roots beneath the Sarmatia–Fennoscandia junction zone for over 200 km from the nearest known outcrop of Archean rocks in the Ukrainian Shield. The second model is that the Central Belarus Suture Zone represents a rifted-out fragment of the Kola–Karelian craton that was accreted to Sarmatia before the actual collision of these two segments of Baltica.

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Section: The Possible Protolith Of the Eclogitesmentioning

confidence: 70%

U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform

Shumlyanskyy

Tsymbal²,

Kusiak

et al. 2021

Geosciences

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“…These belts/terranes were earlier considered being part of Fennoscandia. In their recent paper, however, based on reflection seismic arguments, Mę żyk et al [24] maintain that the FSS "cannot be interpreted as a localised lithospheric discontinuity" following the Minsk fault (see Figure 2b), but rather as a "diffused cryptic" one, split into the particular terranes within the NW Sarmatian margin and their respective boundaries. Taking into account all of these variants, we show the FSS position according to the relatively recent interpretation of [23] in the map of Figure 3b, while presenting the entire postulated map-based location range in Figures 11 and 12.…”

Section: Sarmatia-fennoscandia Contactmentioning

confidence: 99%

“…Along-strike projections of the range of several predicted locations for the Fennoscandia-Sarmatia suture (FSS, after [23,31,43], taking into account data from [24,25] and of the Orsha-Volhynia rift basin system (after [23,43]) from the East European craton are also shown.…”

Section: Polish Basin Lviv Basin Radom -Krasnik Fold Belt Narol High Volhyno -Podolian Homoclinementioning

confidence: 99%

“…As already mentioned, the crustal-scale geometry and structural characteristics of the contact between Fennoscandia and Sarmatia were recently analysed by Mę żyk et al [24] in an area located directly NE of the TTZ-South transect, over the EEC area proper. Using deep reflection seismic data of the PolandSPAN™ survey, these authors advocate for a NW-vergent, complex, diffuse, thrust wedge-like geometry of the contact zone in question, ~150 km wide and "rooted at the lower-middle crust interface underneath the Ivanowo-Borisov zone" (cf.…”

Section: Sarmatia-fennoscandia Contactmentioning

confidence: 99%

“…The TTZ-South profile extends between the vicinities of the town of Radom in southeastcentral Poland and Chernivtsi in Ukraine, close to the border with Moldova. [23] simplified by Mę żyk et al [24]) and (b) on the top of crystalline basement outline map of the East European platform by Krzemi ńska et al (ref [25] modified after Mę żyk et al [24]). The red square shows the location of Figure 2b.…”

Section: Introductionmentioning

confidence: 99%

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Lithospheric Structure of the East European Craton at the Transition from Sarmatia to Fennoscandia Interpreted from the TTZ-South Seismic Profile (SE Poland to Ukraine)

et al. 2022

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The TTZ-South seismic profile follows the Teisseyre–Tornquist Zone (TTZ) at the SW margin of the East European Craton (EEC). Investigation results reveal the upper lithospheric structure as representing the NW-vergent, NE-SW striking overthrust-type, Paleoproterozoic (~1.84–1.8 Ga) Fennoscandia-Sarmatia suture. The Sarmatian segment of the EEC comprises two crustal-scale tectonic thrust slices: the Moldavo-Podolian and Lublino-Volhynian basement units, overriding the northerly located Lysogoro-Radomian unit of Fennoscandian affinity. The combined results of the TTZ-South and other nearby deep seismic profiles are consistent with a continuation of the EEC cratonic basement across the TTZ to the SW and its plunging into the deep substratum of the adjacent Paleozoic platform. Extensional deformation responsible for the formation of the mid to late Proterozoic (~1.4–0.6 Ga), SW-NE trending Orsha-Volhynia rift basin is probably also recorded. The thick Ediacaran succession deposited in the rift was later tectonically thickened due to Variscan deformation. The Moho depth varies between 37 and 49 km, resulting in the thinnest crust in the SE, sharp depth changes across the TTZ, and slow shallowing from 49 to 43 km to the NW. The abrupt Moho depth increase from 43 to 49 km is considered to reflect the overlying lower crust tectonic duplication within the suture zone.

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Paleoproterozoic tectonics of Fennoscandia and the birth of Baltica

Lahtinen,

Köykkä,

Salminen

et al. 2023

Earth-Science Reviews

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Structure of a diffuse suture between Fennoscandia and Sarmatia in SE Poland based on interpretation of regional reflection seismic profiles supported by unsupervised clustering

Cited by 6 publications

References 49 publications

U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform

U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform

Lithospheric Structure of the East European Craton at the Transition from Sarmatia to Fennoscandia Interpreted from the TTZ-South Seismic Profile (SE Poland to Ukraine)

Paleoproterozoic tectonics of Fennoscandia and the birth of Baltica

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