Temat: structural geology - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Structural development of Legoupil Formation at Cape Legoupil, Antarctic Peninsula
Autorzy:: Tokarski, Antoni K.
Tematy:: Antarctica
Legoupil Formation
structural geology; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2052956.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Insights into the palaeoenvironments, structure and stratigraphy of the lower Miocene of the Eastern Carpathians Bend Zone, Romania
Autorzy:: Bercea, Răzvan-Ionuţ
Bălc, Ramona
Tămaș, Alexandra
Filipescu, Sorin
Mircea Tămaș, Dan
Guillong, Marcel
Flavius Szekely, Flavius
Lukács, Réka
Tematy:: biostratigraphy
tuff
zircon U-Pb age
sedimentology
structural geology; Pokaż więcej
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/22446584.pdf Link otwiera się w nowym oknie
Opis:: The ages of several Oligocene to Miocene sedimentary formations from the Eastern Carpathians Bend Zone are poorly constrained due to palaeoenvironmental factors, reworking of fossils, structural complexity and limited exposure. To help overcome these issues, this study integrates calcareous nannoplankton and foraminifera biostratigraphy with isotopic age dating (U-Pb) of volcaniclastic zircons, and sedimentological and structural observations/interpretations. Our study was carried out along an ~6-km-long section made from a series of outcrops along the Bizdidel River which exposes several formations such as the Pucioasa, Fusaru, Vinețișu, Starchiojd and Slon. We show that the Fusaru Formation consists of coarse-grained rocks deposited as confined longitudinal channel successions that migrated laterally. It is bounded by the mud-rich Pucioasa and Vinețișu formations which are lateral equivalents of the Fusaru confined channels deposited as levee/overbank units. These genetically related formations appear to reach younger ages – of the lower to middle Burdigalian based on calcareous nannoplankton and foraminifera biostratigraphy – than previously thought (upper Oligocene to lower Burdigalian). The dominant organic-rich mudstones of the Starchiojd Formation represent pelagites/hemipelagites deposited in anoxic conditions. Their middle Burdigalian age is established by a 17.41 ±0.27 Ma zircon U-Pb age of zircons from the Bătrâni Tuff in the Starchiojd Formation. Based on the similar phenocryst content, zircon U-Pb age and zircon trace element composition, the source of the tuff is suggested to be the 17.3 Ma Eger ignimbrite-forming eruption, which has proximal, near-caldera deposits in the Bükkalja Volcanic Field, Hungary. The mud-rich Slon Formation seems to be related to shelf edge/upslope failure that formed cohesive debrite avalanches resulting from foreland propagation of compression. The Slon Formation extends in this area to at least the upper part of the lower Miocene to middle Miocene. These results highlight the need to revise ages of those parts of the sequence which are poorly constrained or different in other parts of the Carpathian Basin. Such revised ages help to better constrain the understanding of the deformation history of the Carpathians.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Structural control on the initiation and development of the Biała Wisełka Landslide Complex (Silesian Beskid, Outer Carpathians, Southern Poland)
Autorzy:: Sikora, R.
Tematy:: landslides
structural geology
lineaments analysis
LiDAR
Silesian Nappe
flysch Carpathians; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:: https://bibliotekanauki.pl/articles/184722.pdf Link otwiera się w nowym oknie
Opis:: The numerous landslides which have developed in the mostly Cretaceous to Eocene turbiditic rocks of the Silesian Beskid are genetically and geometrically controlled by bedrock structural features, the Biała Wisełka Landslide Complex being no exception. Its location is in the headwater area of the Wisła River, on the slopes of Mt. Barania Góra (1220 m a.s.l.). The bedrock is represented by flysch strata of the Silesian Nappe (Outer Carpathian Fold-and-Thrust Belt), or, more specifically, the Upper Cretaceous turbiditic Upper Godula and Lower Istebna Beds of the Godula Thrust Sheet. The research work consisted in their mapping and structural analysis, facilitated by the use of a high-resolution digital elevation model based on LiDAR data. A comparative analysis enabled the determination of the relationships between landslides and the bedrock structure. The study results point to significant roles being played by the joint network, fault systems, the structural arrangement and the lithology of rock strata in the initiation and evolution of the studied landslide complex. An additional result of the methods applied methods was the identification and characterization of previously unknown fault zones in the study area.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Development of fault pattern in the Silesian Nappe: Eastern Outer Carpathians, Poland
Autorzy:: Rubinkiewicz, J.
Tematy:: Polish Eastern Outer Carpathians
flysch
structural geology
fault slip analysis; Pokaż więcej
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/2059434.pdf Link otwiera się w nowym oknie
Opis:: The development of fault pattern in the Silesian Nappe (Central Carpathian Depression) in the eastern part of Polish Outer Carpathians is outlined, from field observations and interpretation of air photos and radar images. Fault slip analysis and palaeostress reconstruction was applied to determine different systems of strike-slip, reverse and normal faults and the relative age of each system was determined. The results show a consistent evolution of fault systems which occurred as several episodes. Some of these episodes are local but others represent a regional pattern of faulting across the whole Polish Eastern Outer Carpathians. The beginning of fault evolution took place in Late Oligocene to Late Miocene times. The oldest phase is represented by reverse and thrust faults of system R1 with SW-NE compression; a younger phase involves origination of strike-slip faults belonging to system S1 (with the same direction of compression). Reverse (system R2) and strike-slip (system S2) faults were formed locally during a N-S compressional event. Dextral strike-slip faults of system S3 with simultanous opening of a dextral set of fault system S1 originated subsequently. The youngest events are represented by normal faults N1, N2, and N3 systems during NW-SE, and SW-NE to N-S extension.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Fault network in Rio Colca valley between Maca and Pinchollo, Central Andes, southern Peru
Autorzy:: Żaba, J.
Małolepszy, Z.
Gaidzik, K.
Ciesielczuk, J.
Paulo, A.
Tematy:: tectonics
structural geology
fault activity
Rio Colca Valley
Andes
southern Peru; Pokaż więcej
Wydawca:: Polskie Towarzystwo Geologiczne
Powiązania:: https://bibliotekanauki.pl/articles/191912.pdf Link otwiera się w nowym oknie
Opis:: The network of faults and joints within the Mesozoic, Miocene and Pleistocene–Holocene formations was studied in the Rio Colca valley, in the Pinchollo–Lari–Maca area (Central Andes, southern Peru). A complex, multi-phase development of these structures was revealed. The results show that the structural framework of the Rio Colca valley consists of WNW–ESE and NE–SW faults, and a few W–E faults. The strike of the most common fault sets is approximately parallel (longitudinal) or perpendicular (transverse) to the W–E oriented strike of stratification surfaces in the Mesozoic sedimentary series and the W–E fold macro-structures, developed in these strata. Diagonal faults and joints are less common, although at some localities they are numerous. The recurrence of major fault systems throughout the Mesozoic and Miocene series and the Pleistocene–Holocene (mainly colluvial) deposits is proof of recent, tectonic activity in the study area. The recent faulting has led to the development of a system of distinct, primary fault scarps, tectonic grabens and horsts, as well as open fissures, which are well marked in the surface morphology, and in many cases have not yet been eroded.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Miocene transpression effects at the boundary of Central Carpathian Paleogene Basin and Pieniny Klippen Belt - examples from Polish-Slovakian borderland
Autorzy:: Ludwiniak, M.
Tematy:: structural geology
tectonics
Western Central Carpathians
Podhale basin
Spišska Magura
faults
folds
joints
calcite veins; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:: https://bibliotekanauki.pl/articles/184548.pdf Link otwiera się w nowym oknie
Opis:: A geological structural study has been conducted along the tectonic contact zone of the Central Carpathian Paleogene Basin (CCPB) and Pieniny Klippen Belt (PKB) in the eastern Podhale and western Spišska Magura areas. It concerned mostly the Central Carpathian Paleogene flysch strata and, to a lesser degree, the Upper Cretaceous rocks of the PKB. Tectonic deformation structures genetically related to the important tectonic boundary in question occur within a c. 1.5–2 km-wide strip of the Paleogene flysch rocks adjacent from the south to the PKB. Two parallel structural domains have been distinguished within this strip: the contact zone proper in the north and the peri-Pieniny monocline in the south. Most of the minor faults documented in the Paleogene flysch bear a record of dextral motion parallel to the contact zone. Some dextral-reverse oblique slip faults of NE-SW and W-E trends have also been recognized. Discrepancies in the orientation and sense of movement on strike-slip faults in the Paleogene flysch rocks and those in marlstones of the “klippen envelope” of the PKB were encountered. They probably reflect differences in the structural history of both the adjacent rock complexes, as the Upper Cretaceous deposits of the PKB must have experienced more deformation events and, in general, were affected by much more intense strain than those of the CCPB. Contractional structures, such as south-vergent reverse faults and recumbent folds which point to ca N-S tectonic shortening, have also been found in the Paleogene rocks. The entirety of the structural features found in the CCPB is characteristic of a transpressional regime. The regionally consistent coexistence of structures resulting from strike-slip movements and tectonic shortening, as well as features pointing directly to a transpressional regime, prove the transpressional dextral nature of the contact between the CCPB and PKB.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: What are cleats? Preliminary studies from the Konin lignite mine, Miocene of central Poland
Autorzy:: Widera, M.
Tematy:: lignite cleats
structural geology
lignite seams
Miocene
Central Poland
węgiel brunatny
geologia strukturalna
pokłady węgla brunatnego
miocen
Polska centralna; Pokaż więcej
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Powiązania:: https://bibliotekanauki.pl/articles/94350.pdf Link otwiera się w nowym oknie
Opis:: Cleats (fractures, joints) are discontinuities in coals, including lignites. They are important in mining activity because of their gas and water permeability in hard coal, and mainly because of their water permeability in lignites. As opposed to hard-coal cleats, lignite cleats have not been studied in detail before. The present contribution does so, using as an example the 1st Middle-Polish Lignite Seam (MPLS-1) in the Jóźwin IIB opencast mine in central Poland. It should be mentioned here that any remarks in the present contribution concerning MPLS-1 refer exclusively to this lignite seam in the Jóźwin IIB opencast mine. The investigated discontinuities consist of two sets, i.e. the face and butt cleats, which are roughly oriented NW–SE and NE–SW, respectively. The mean spacing of the face cleats is ~12.4 cm, while the mean spacing of the butt cleats is ~12.8 cm. The maximum average aperture is ~4.9 mm for the face cleats and ~4.1 mm for the butt cleats. The cleat spacing and aperture do not depend on the lignite thickness, but the cleat spacing increases with increasing mineral-matter and xylite content, whereas the aperture increases when the contents decrease. The regional folding and local salt diapirism tentatively explain the formation of the orthogonal system of the lignite cleats, partly because of the parallelism of the face cleats and the major tectonic directions in central Poland.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Geologia strukturalna obszaru między Żegociną a Łososiną Górną
Structural geology of the area between Żegocina and Łososina Górna
Autorzy:: Kiszka, Łukasz
Opis:: Niniejsza praca magisterska dotyczy geologii strukturalnej okolic okna tektonicznego Młynnego. W celu zbadania utworów występujących na terenie objętym pracą, zostały wykonane pomiary terenowe parametrów zalegania warstw oraz położenia powierzchni ciosowych, a także analizy danych pochodzących z lotniczego skanowania laserowego (ALS) oraz projekcji stereograficznych. Dokument zawiera dokładne wyniki wykonanych badań oraz szkic tektoniczny obszaru objętego pracą magisterską, stworzoną na podstawie przeprowadzonej analizy struktur.
This master thesis concerns the structural geology of the Młynne tectonic window area. In order to examine rock exposures found in the area covered by the work, field measurements of the parameters of the layers deposition and the location of joints were made, as well as analysis of data from airborne laser scanning (ALS) and stereographic projections. This document contains the results of the research and also a tectonic sketch of the area covered by the master's thesis, created on the basis of the analysis of structures.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 9.

Tytuł:: Udostępnione pogórnicze obiekty podziemne Dolnego Śląska jako zaplecze geoturystyczne
Underground tourist routes of Lower Silesia as geotourist objects
Autorzy:: Zagożdżon, P. P.
Zagożdżon, K. D.
Tematy:: geotourism
underground tourist routes
Lower Silesia
petrography
mineralogy
structural geology
mining
geoturystyka
pogórnicze obiekty podziemne
Dolny Śląsk
petrografia
mineralogia
geologia strukturalna
górnictwo
geologia str; Pokaż więcej
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/2075015.pdf Link otwiera się w nowym oknie
Opis:: Tourist routes in the historic underground mining workings are an ideal base for geotourism. Lower Silesia is an area favoured in this respect, due to the amount and variety of such objects. They allow observation of different geological units: diversity of their lithology, mineralization, types of deposits, tectonics, as well as very interesting aspects of mining. This paper presents proposals of geotourist routes or observation sites in underground facilities described for Złoty Stok, Krobica, Kowary, Kletno and Osówka. Long and continuous lithological profiles, interesting rocks (e.g. rheomorphic granites in Osówka), signs of mineralization (löllingite in Złoty Stok, fluorite and amethyst in Kletno), numerous dislocation zones and folds, well-preserved historic mining workings (16th and 18th- century adits in Krobica) and many others are available for observation in these objects.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Geometric characteristics of structural networks based on digital photogrammetry on selected outcrops examples in the Polish part of Western Variscides
Geometryczna charakterystyka sieci strukturalnych w oparciu o fotogrametrię cyfrową na wybranych przykładach odsłonięć w polskiej części Sudetów
Autorzy:: Kusmirek, Zofia
Opis:: Prace terenowe zostały wykonywane w trakcie 30 dni na terenie polskiej części Sudetów Zachodnich. Wykonano 40 nalotów dronem w celu pozyskania danych cyfrowych do wykonania modeli fotogrametrycznych. Z pozyskanych danych wykonano 27 modeli fotogrametrycznych. Do wykonania płaszczyzn spękań w programie Blender wykorzystano 3 odsłonięcia, najlepiej przedstawiające struktury geologiczne (kamieniołom ryolitu w Okrzeszynie, kamieniołom piaskowca ciosowego Szczytna – Zamek, kamieniołom kwarcytu Stanisław). Wykonano model skałki Czarcia Maczuga ze wsi Gorzeszów. Na jego podstawie utworzono NMT i ortofotomozaikę. Oba modele ułożono na tle mapy satelitarnej automatycznie wygenerowanej ze źródła Open Street Maps. Do każdego z modeli 3D wykonano płaszczyzny spękań oraz odpowiednio je dopasowano, by leżały zgodnie ze spękaniami widocznymi na modelu 3D. Wykonano obliczenia azymutu linii biegu, azymutu kąta upadu, wartość kąta upadu odsłonięć. Na bazie sporządzonych obliczeń wykonano siatki stereograficzne 2D, siatki stereograficzne 3D, diagramy rozetowe, histogramy rozkładu azymutu kąta upadu. Dokonano interpretacji wyników i określono w jakich kierunkach zapadają płaszczyzny.
The field works were carried out during 30 days in the Polish part of the Western Sudetes. 40 drone raids were carried out in order to obtain digital data for the implementation of photogrammetric models. From the obtained data, 27 photogrammetric models were made. In the Blender program, 3 exposures were used to make the fracture planes, best representing geological structures (rhyolite quarry in Okrzeszyn, Szczytna - Zamek sandstone quarry, Stanisław quartzite quarry). Also a model of the Czarcia Maczuga rock from the village of Gorzeszów was made. On its basis, the NMT and the orthophotomosaic were created. Both models were arranged against the background of a satellite map automatically generated from the Open Street Maps source. Fracture planes were made for each of the 3D models and adjusted accordingly so that they were in line with the cracks visible on the 3D model. The calculations of the azimuth of the running line, the azimuth of the dip angle, and the value of the exposure dipping angle were performed. Based on the calculations made, 2D stereographic meshes, 3D stereographic meshes, rosette diagrams, and histograms of the azimuth distribution of the dip angle were made. The results were interpreted and the directions in which the planes collapsed were determined.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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