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Tytuł:
Lithospheric structure across the Trans-European Suture Zone in NW Poland based on gravity data interpretation
Autorzy:
Królikowski, C.
Petecki, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2059901.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Trans-European Suture Zone
gravity anomalies
structural-density model
gravity stripping
lithospheric structure
Opis:
We provide an analysis of geophysical and geological data from the Baltic segment of the Trans-European Suture Zone (TESZ). The construction of structural and density maps of the Zechstein-Mesozoic-Cenozoic complex has allowed identification of anomalies of basement orgin. As a result of interpretation of these anomalies, major structural elements of the lithosphere have been characterised. According to gravity modelling the crustal structure is more complicated than shown on velocity model along refraction and wide-angle reflection profile LT-7. Long-wavelength anomalies have been modelled in terms of lateral heterogeneity within the lower crust and upper mantle. In order to achieve a match between the observed and calculated gravity effects, it was necessary to assume dense upper mantle beneath the TESZ. Gravity data also indicate the presence of high-density bodies in the upper crust, and a complex transitional zone between crust and upper mantle in the TESZ.
Źródło:
Geological Quarterly; 2002, 46, 3; 235-246
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculation of a stripped gravity map with a high degree of accuracy: a case study of Liptovská Kotlina Basin (Northern Slovakia)
Autorzy:
Szalaiová, E.
Bielik, M.
Makarenko, I.
Powiązania:
https://bibliotekanauki.pl/articles/2060228.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
pre-Tertiary basement
Central Carpathian Paleogene
Liptovská Kotlina Basin
gravity
stripped gravity map
2D and 3D forward-modelling gravity
Opis:
The paper deals with the construction and calculation of a stripped gravity map with a high de gree of accu acy. In the Western Carpathian basins such types of gravity maps represent the corrected Bouguer anomalies by the gravity effects of the Tertiary sedimentary masses. It means that the re sultant stripped gravity map reflects the gravity effects of den sity inhomogeneities, which are located beneath the pre-Tertiary basement. For determination of this map, the modern progres sive forward-mod elling gravity method was applied. The advantage of this method in comparison with previous approaches is that it is capable of calculating the 3D gravity effects of the geological bodies with real topography. A case study for presentation of a new and precise stripped gravity map, the Liptovská Kotlina Basin, was chosen, because it is one of the best-surveyed basins in the West ern Carpathians. This new gravity map represents, for this moment, the most accurate stripped gravity map in the whole Western Carpathians. It allows construction not only of a very precise 3D gravity model of the sedimentary fill but also enables interpretation of the sources of the gravity anomalies revealed in the stripped gravity map. This interpretation is based on all available geophysical and geological constraining data. It is also supported by 2D analysis of the gravity effects of the main tectonic units building the Liptovská Kotlina Basin.
Źródło:
Geological Quarterly; 2008, 52, 2; 103-103
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ideal body analysis of the Pomerania Gravity Low (northern Poland)
Autorzy:
Petecki, Zdzisław
Powiązania:
https://bibliotekanauki.pl/articles/2058585.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
gravimetry
Pomerania Gravity Low
ideal body analysis
northern Poland
Opis:
The large negative residual Bouguer gravity anomaly in northern Poland called the Pomerania Gravity Low (PGL) was analysed using Parker's ideal body theory. A residual gravity anomaly along the profile was inverted to find bounds on the density contrast, depth, and minimum thickness of its sources. As the ideal body reaches the surface, the greatest maximum negative density contrast is -0.038 g/cm3, while the body itself has a thickness of 52 km. If 8 km is taken as a depth to the source body top, the density contrast must correspond to at least -0.092 g/cm3, with a maximum allowable thickness of 18 km. The ideal body inversions show that the depth to the body top cannot exceed 15 km. Assuming a geologically reasonable maximum density contrast as small as -0.2 g/cm3, the source body top can be no deeper than 11.5 km, and its thickness greater than or equal to 6 km, assuming it extends up to the Earth surface, or greater than or equal to 7 km, when its top is below 8 km depth. It can be hypothesized that the main source of the negative gravity anomaly is reIated to a predominance of felsic rocks in the Paleoproterozoic Dobrzyń Domain of the East European Platform basement.
Źródło:
Geological Quarterly; 2019, 63, 3; 558--567
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enceladus as a place of origin of life in Solar System
Autorzy:
Czechowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/2059372.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
life origin
Enceladus
panspermia
gravity assist
Poynting-Robertson effect
impact
Opis:
Enceladus, a satellite of Saturn, with its radius of 250 km, is the smallest geologically active celestial body in the Solar System. My model of core origin and evolution indicates that for hundreds of My after accretion Enceladus was an appropriate body for an origin of life. I continue consideration of the hypothesis that Enceladus was a cradle of life in the Solar System. I found that simple organisms could be ejected in icy grains into the space by volcanic jets or by meteoroid impacts. Several mechanisms could be responsible for later transport of the grains to the early Earth and other terrestrial planets. Eventually I suggest that Enceladus is the most appropriate body for a cradle of life in the Solar System.
Źródło:
Geological Quarterly; 2018, 62, 1; 172--180
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grawimetryczno-hydrometryczny system monitoringu wstrząsów górniczych na Górnym Śląsku
Gravimetric and hydrometric system for monitoring of mining tremors in Upper Silesia
Autorzy:
Kotyrba, Andrzej
Frolik, Adam
Kortas, Łukasz
Siwek, Sławomir
Powiązania:
https://bibliotekanauki.pl/articles/2076014.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
grawitacja
wody gruntowe
górnictwo
drżenia
monitorowanie
gravity
groundwater
mining
tremors
monitoring
Opis:
The article presents the characteristics of the gravimetric and hydrometric system for observation of mining tremors in Upper Silesia. Individual system components were installed in the years 2018-2019 as part of the European Platform Observing System -Poland project with the acronym EPOS-PL, financed from the EU program - Intelligent Development. The system records the changes in gravitational acceleration and groundwater level with a frequency of 1 Hz in the mining and post-mining areas. The analysis of the measurement data collected allows evaluating the sensitivity of the system and the possibilities of its use in the mining seismicity studies in Upper Silesia, as well as monitoring rock mass movements under the influence of seismic and geodynamic phenomena in other parts of the world.
Źródło:
Przegląd Geologiczny; 2020, 68, 11; 833--842
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Holy Cross Mts. area - crustal structure, geophysical data and general geology
Autorzy:
Dadlez, R.
Powiązania:
https://bibliotekanauki.pl/articles/2059271.pdf
Data publikacji:
2001
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Holy Cross Mountains
gravity
deep seismic soundings
crustal structure
regional geology
Opis:
At the start of international seismic experiment CELEBRATION 2000 an attempt at the compilation of the present geophysical and geological data in the Holy Cross Mountains and their surroundings has been made. Five geological units of the first order and four their dividing fault zones have been distinguished in the area studied: uplifted part of the Precambrian Craton (A), Lublin Unit (B), Radom-Łysogóry Unit (C), Kielce-Nida Unit (D), and Upper Silesian Massif (E). They are separated by fault zones: Kock Fault Zone (1) between A and B, Kazimierz Fault Zone (2) between B and C, Holy Cross Fault (3) between C and D, Cracow-Lubliniec Fold Zone (4) between D and E. The first and last units bordering the area are not discussed in this paper. Units B and C are built on the cratonic crust up to 54 km thick. Unit C is composed of poorly correlated mosaic of crustal blocks with crust 35-45 km thick. Fault zones 1 and 3 coincide with crustal fractures while zone 2 has not its counterpart in crustal structure.
Źródło:
Geological Quarterly; 2001, 45, 2; 99-106
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Aptian Gura Râului conglomerates (Southern Carpathians) : remains of an extended subaqueous gravity flow deposit from the eastern flank of the Getic Nappe
Autorzy:
Ungureanu, Răzvan
Săsăran, Emanoil
Bucur, Ioan I.
Mircescu, Cristian Victor
Ungureanu, Alexandra
Ungur, Ciprian Gheorghiţă
Powiązania:
https://bibliotekanauki.pl/articles/2058596.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
conglomerates
gravity flow deposits
fan-deltas
Lower Cretaceous
Piatra Craiului Massif
Romania
Opis:
The Getic Nappe belongs to the Central Dacides or Dacia Mega Unit. Gravity flow deposits were generated by the Lower Cretaceous overthrust and uplift of this unit over the External Dacides. In the Piatra Craiului Syncline (part of the Getic Nappe), such detrital deposits are represented by the Aptian conglomerates and the uppermost Albian-Cenomanian conglomerates. Part of the infill of the syncline consists of a thick pile of NW-SE oriented conglomerates. Sedimentological study documents the presence of an association which consists of three distinct facies types, represented by: massive conglomerates; alternating conglomerates, sandstones and microconglomerates; and fining- and coarsening-upwards conglomerates. These deposits were accumulated through a series of debris flows, and hyperconcentrated or concentrated flows. The entire assemblage represents a complex routing system within submarine channels, an interpretation made by interpreting facies associations, palaeoflow directions and clast fabrics. A large part of this succession was removed by post-Albian erosion. Thus, the interpretation of the depositional system could be as a series of feeder channels or the submarine sector of a fan-delta system representing a foreland basin fill.
Źródło:
Geological Quarterly; 2019, 63, 1; 88--105
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geophysical cartography in Poland : an overview
Autorzy:
Krzywiec, P.
Nawrocki, J.
Polechońska, O.
Wróblewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/2065895.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
geophysical cartography
seismic data
magnetic field
gravity field
thermal field
petrophysical parameters
Opis:
Regional analysis and mapping of various geophysical data has been recognized as an important — even crucial — element of geological studies for many years. Due to rapid development of advanced numerical tools it is presently possible to construct, maintain and comprehensively analyse even very large geo-databases, including seismic, gravity, magnetic, geothermal and other geophysical data. In many countries, national geological surveys, commercial companies and research institutions are involved in mapping projects focused on spatial representation of geophysical data that could later be used for various studies. Recently, new policy of the Polish Ministry of Environment regarding geological cartography in years 2005–2020 has been declared (cf. Ber & Jezierski, 2004). In this document, geological cartography is used as a rather wide term that includes also other geo-disciplines like geoenvironmental studies or surface geochemistry. Among them, mapping of geophysical data is also mentioned. In this paper, short overview of the current state-of-the-art of selected aspects of regional geophysical mapping in Poland is given, with some remarks regarding potential directions of future work.
Źródło:
Przegląd Geologiczny; 2005, 53, 10/2; 967-972
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pobór i opróbowanie powierzchniowych, silnie uwodnionych osadów jeziornych o nienaruszonej strukturze-uwagi metodyczne i stosowany sprzęt
Coring and subsampling of undisturbed recent lake sediments with high water content-remarks about methodology and equipment
Autorzy:
Tylman, W.
Powiązania:
https://bibliotekanauki.pl/articles/2074556.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
osady jeziorne
pobór
próbnik grawitacyjny
lake sediments
coring
gravity corer
core sectioning
Opis:
This study presents some remarks about coring and sectioning cores of recent lake sediments. Effective coring of such sediments is not easy because they are very loose (water content usually exceeds 90%]. Precisely taken core should consist of near-bottom water and undisturbed sediment column. The most widely used are gravity corers which are simple in construction and operation. The gravity corer presented here is additionally equipped with percussion system to improve penetration into the sediment. It enables to take cores 94 mm in diameter and up to 90 cm in length. The corer with rubber stopper blocked is lowered through the water and pushed into the sediment. While retrieving the core, the stopper settles into the top of the core tube. At the surface, the plug is inserted into the bottom of the core tube. After collecting, the core should be extruded and sectioned. A device presented here enables to divide the core into short intervals [0.5-1 cm]. The core is extruded upwards and samples can be collected from the tray placed on top of the tube. Both the corer and the extruder are relatively small and light. This equipment have been used in the Department of Geomorphology & Quaternary Geology at Gdańsk University for several years. So far, cores from more than 60 lakes of various depths [up to 50 m] have been successfully taken.
Źródło:
Przegląd Geologiczny; 2007, 55, 2; 151-156
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
50-lecie odkrycia złoża węgla brunatnego w Złoczewie
The fiftieth anniversary of the Ztoczew brown coal deposit discovery
Autorzy:
Podemski, M.
Powiązania:
https://bibliotekanauki.pl/articles/2074914.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Złoczew
brown coal deposit
negative gravity anomaly
złoża węgla brunatnego
anomalia grawitacyjna
Opis:
At the beginning of1962, a brown coal deposit has been discovered by the Złoczew IG-1 borehole drilled in the centre of a local negative gravity anomaly in Central Poland by the Polish Geological Institute. Thorough exploration of the deposit has established its brown coal reserves for about half a billion tons. Additionally, the discovery provedfor the first time that negative gravity anomalies could also be caused by brown coal concentrations, and not only by salt diapirs.
Źródło:
Przegląd Geologiczny; 2012, 60, 12; 643--645
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany regionalnego pola siły ciężkości w północnej części Górnośląskiego Zagłębia Węglowego w latach 2002-2003
Regional gravity field variations in the northern part of Upper Silesian Coal Basin in the years 2002-2003
Autorzy:
Kotyrba, A.
Balicki, A.
Kortas, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/2074405.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
geodynamics
regionalne pole grawitacji
geofizyka
geodynamika
Górnośląskie Zagłębie Węglowe
geophysics
regional gravity
time changes
mining
Opis:
The paper presents the results of gravimetric studies conducted in the northern part of the Upper Silesian Coal Basin (USCB, S Poland) in the year 2002 and 2003. Within a year, two series of measurements were conducted on the stabilized set of points in the subrectangular study area (26x36 km). The study aimed at detecting time variations of the regional gravity field. The gravity field influences several geological processes upon which depend rock mass stability in the upper parts of the lithosphere and the shape of the Earth’s surface. This field is also a cause of rock mass move-ments in areas of underground mining activity. Thus, the main goal of the study was to determine the correlation of temporal variations of the gravitational field with the geological structure of the area and the underground hard coal exploitation (subsidence, seismic tremors). Additionally, an attempt was made to determine whether the correlation could be used to monitor current geodynamic processes in USCB.
Źródło:
Przegląd Geologiczny; 2005, 53, 4; 299-305
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrogeologiczne przyczyny zmian przyspieszenia siły ciężkości na stanowisku w Obserwatorium Astronomiczno-Geodezyjnym w Józefosławiu
Hydrogeological influences in the absolute gravity changes at Astro-Geodetic Observatory in Józefosław
Autorzy:
Olszak, T.
Barlik, M.
Pachuta, A.
Powiązania:
https://bibliotekanauki.pl/articles/2075765.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
siła ciężkości
pole siły ciężkości
płyta Bouguera
efekt hydrogeologiczny
absolute gravimetry
gravity field
Bouguerplate
hydrogeological effect
Opis:
The article presents the results of measurements of gravity performed in the Astronomical and Geodetic Observatory Józefosław. Time series have been verified for parameters related to celestial bodies, atmospheric pressure changes and metrological factors. The analysis of these changes includes geodynamic and hydrological aspects taking into account global and local changes in groundwater levels. The aim of the article is to indicate the interpretation of contemporary measurements of gravity field against the contemporary accuracy of such measurements and to indicate the need for information on the level of groundwater (collected by the Polish Hydrogeological Survey) in procedures for the elaboration and interpretation ofgravimetric measurements and supportfrom hydrogeologists. Contemporary the gravity measurements with use of absolute gravimeters gives possibility determination of gravity value with uncertainty of the order 10-8 ms-2. Such accuracy corresponds to a vertical displacement of a point of less than 1 cm or a change in the water level of 2.5 cm. Use of gravimetric methods in the broadly understood Earth sciences must be supported by information related to changes in mass distribution around the measuring station, mainly related to the groundwater level changes. This allows to see the role of hydrogeological information related to the monitoring of groundwater as an indispensable information describing changes in the Earth’s gravity field.
Źródło:
Przegląd Geologiczny; 2017, 65, 11/1; 1139--1143
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Internal structure of the buried Suwałki Anorthosite Massif (East European Craton, NE Poland) based on borehole, magnetic and gravity data combined with new petrological results
Autorzy:
Petecki, Zdzisław
Wiszniewska, Janina
Powiązania:
https://bibliotekanauki.pl/articles/2058851.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
AMCG pluton
Suwałki Anorthosite Massif
potential field analysis
remanent magnetization
modeling of gravity
magnetic data
geological map
Opis:
Advanced magnetic and gravity data analysis has been used to acquire geophysical constraints providing new insights into the geological structure of the Suwałki Anorthosite Massif (SAM). The large negative magnetic anomaly of the SAM anorthosite intrusion is a result of the negative inclination of remanent magnetization, directed antiparallel to the present Earth’s magnetic field. Several filtering processes were applied to the magnetic and gravity maps to better understand the subsurface geology of the SAM area. The geological analysis of residual magnetic and gravity anomaly maps reveals the presence of different rock units, reflecting variation in petrological composition of the crystalline basement rocks. The 2-D modelling of magnetic and gravity data delineate the location and extent of the anorthosite-norite massif. The data is consistent with a thick upper crustal body with density 2690 kg/m3, low susceptibility (0.005 SI) and natural remanent magnetization (1.95 A/m), having inclination of I = –68°, and declination of D = –177°. The rocks bordering the central anorthosite body consist of norite and gabbronorite, granodiorite, diorite and charnockite. These main crystalline basement crustal units are shown more precisely on a new geological map of the SAM.
Źródło:
Geological Quarterly; 2021, 65, 1; 4
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Cretaceous - Early Palaeogene sandy-to-gravelly debris flows and their sediments in the Silesian Basin of the Alpine Tethys (Western Outer Carpathians, Istebna Formation)
Autorzy:
Strzeboński, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059835.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
flysch Carpathians
Silesian Nappe
Istebna Formation
deep-water sedimentary environment
sediment gravity flows
debris flows
siliciclastic deposits
debrites
depositional system
apron
Opis:
The study focuses on Upper Cretaceous - Palaeocene deposits from the Beskid Śląski mountain range in southern Poland constituting the Istebna Beds. The Istebna Beds, also referred to as the Istebna Formation, are part of the Silesian tectonic unit, which forms the Outer Carpathian fold-and-thrust belt (part of the Alpine-Carpathian system). The results of qualitative and quantitative lithological-sedimentological studies were the basis for the interpretation of lithofacies types, sedimentary processes and palaeoenvironment as well as for the reconstruction of the architecture of the depositional system. The analysis conducted on the basis of field description of the deposits shows the prevalence (nearly 70%) of siliciclastic strata representing a sandstone-conglomerate association (S-C), which is the main subject of this work. The S-C lithofacies: sandstones, gravelly sandstones, sandy conglomerates and conglomerates constitute the deposits formed mostly by mass gravity-flows such as sandy-to-gravelly debris flows. The distribution of the coarse-clastic material indicates a sediment supply from southerly directions and implies the presence of an active source area in the rear part of the Silesian Basin. A succession of the sandstone-to-conglomerate deposits with the secondary participation of other lithofacies, with a thickness of approximately two thousand metres, indicates temporary increased diastrophic activity in the Silesian Ridge (source area) and the intense denudation of this area. The uplift of the alimentation area and its destruction coinciding with enforced relative regression and the uncovering of the proximal depositional zone of the basin led to resedimentation of the older intrabasinal material and repeated mass deposition together with delivery of extraclasts of pre-existing rocks and minerals. The lithofacies development of the sandstone-to-conglomerate debrites and the related sedimentary palaeotransport directions suggest an accumulation domain in the form of a linear apron depositional system developed in a deep-water setting. Experimental modelling of subaqueous sandy flows has contributed to a better understanding of the complex genesis of deep-water sediment gravity flows developing in depositional systems rich in sand material.
Źródło:
Geological Quarterly; 2015, 59, 1; 195--214
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tektoniczne znaczenie strefy Teisseyre’a-Tornquista w świetle nowych badań
Tectonic significance of the Teisseyre-Tornquist zone in the light of new research
Autorzy:
Mazur, S.
Krzywiec, P.
Malinowski, M.
Lewandowski, M.
Aleksandrowski, P.
Mikołajczak, M.
Powiązania:
https://bibliotekanauki.pl/articles/2075679.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
modelowanie grawitacyjne
modelowanie magnetyczne
interpretacja sejsmiczna
obrzeżenie Bałtyku
deformacja kaledońska
architektura crustalna
Polska
gravity and magnetic modelling
seismic interpretation
Baltica margin
Caledonian suture
crustal architecture
Polska
Opis:
The Teisseyre-Tornquist Zone (TTZ), a transcontinental feature evident from magnetic and gravity maps, runs obliquely across the territory of Poland from the NW to SE and for a century it has been considered a deep tectonic boundary between the Pre- cambrian East European Platform (EEP) in the NE and the so-called young Palaeozoic Platform in the SW. The results of quantitative interpretation of gravity and magnetic data, integrated with data from new reflection seismic profiles crossing the TTZ, indicate the continuation of the Precambrian basement of the EEP and its lower Palaeozoic cover toward the SW underneath the Palaeozoic Platform of southwestern Poland. They also suggest the occurrence of a crustal keel beneath the TTZ. In the broader context ofEuropean geology, these results imply the location of a hypothetical Caledonian tectonic suture, marking the site of the collision between Avalonia and Baltica, not along the TTZ, but farther SW, in northern Germany and southwest Poland. Another implication is that the extensive Permian-Mesozoic sedimentary basins of western Poland are established above the attenuated margin of the Baltica palaeocontinent.
Źródło:
Przegląd Geologiczny; 2017, 65, 12; 1511--1520
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 18

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