Wyniki wyszukiwania - Biblioteka Nauki

1

Rozpoznanie geofizyczne dla potrzeb budowy tunelu komunikacyjnego w utworach fliszu karpackiego

100%

Pilecki Z.

Przegląd Górniczy

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2001

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tom T. 57, nr 10

11-14

PL

W artykule przedstawiono zastosowanie metod geofizycznych w budownictwie tunelowym. Zastosowanie to obejmuje fazy projektowania, budowy i eksploatacji tuneli. Podstawowe zadania badań geofizycznych dotyczą rozpoznania budowy geologicznej i właściwości mechanicznych górotworu na etapie projektowania tunelu oraz oceny zagrożeń dla stateczności obudowy tunelu na etapie jego budowy i eksploatacji. W artykule przedstawiono możliwości wybranych metod geofizycznych do realizacji konkretnych zadań badawczych.

EN

Application of geophysical methods in tunneling is presented in the paper. These methods are applied in the planning, construction and post-construction phases. The basic tasks of them apply to recognition of the rock mass geological structure and its mechanical properties in the designing stage and assessment of the hazards for the tunnel lining in the construction and explitation stages. The possibilities of geophysical methods application for specific research tasks are presented.

2

Field mapping of buried faults : a new approach applied in the Western Carpathians

100%

Marko F. , Dyda M. , Gajdoš V. , Rozimant K. , Mojzeš A.

Geological Quarterly

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2015

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tom Vol. 59, No. 1

35--46

EN

Fault array in an area covered by Quaternary sediments and deprived of bedrock outcrops was investigated using fault trace mapping by geophysical methods and human feedback information from dowsing. The tectonics in the study area is dominated by a ENE-WSW fault zone affecting regional-scale structures. The fault network was approximated by dowsing-enhanced mapping and subsequently confirmed by field geophysical measurements using electromagnetic and radon emanometry methods. A resultant detailed map of structural discontinuities highlighted that combined dowsing and geophysical survey is an effective and reliable tool to identify buried faults. This approach with its low costs and fast field recognition is highly recommended for construction-work planning and for mineral resources exploration and exploitation.

3

Geophysical Survey and Archaeological Excavations at the Roman Period Cemetery in Nezabylice (Chomutov District, Northwest Bohemia)

75%

Půlpánová-Reszczyńska A. , Půlpán M. , Křivánek R.

Analecta Archaeologica Ressoviensia

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2017

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tom 12

109-132

EN

This article presents the results of geophysical surveys, which were carried out during the period between 2011 and 2016 at the Roman period cemetery in Nezabylice (Chomutov district, Ústí Region, NW Bohemia). Thanks to these non-destructive surveys, the unusually large scale and signs of the inner structure of the cemetery have been unveiled. On this basis, long-term systematic archaeological research has been carried out, so far uncovering a number of urn graves with military equipment, pit cremation graves, an elite inhumation grave, and several regular structures from Roman period. The results of the comprehensive research suggest that it is the largest and richest cemetery of the Roman period in northwest Bohemia. However, the site is gradually being devastated not only by cyclical agrarian activities but also by the impact of illegal plundering. Therefore, an important aspect of non-destructive surveys is the recording of the current state of the burial ground, the information value of which is gradually degrading.

4

Geoarchaeological studies in Paphos – first results

75%

Kalicki T. , Krupa J. , Chwałek S.

Studies in Ancient Art and Civilization

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2015

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tom 19

233-253

EN

The geoarchaeological research conducted consisted of a geomorphological prospecting of the Paphos region and a geophysical examination of the ancient town of Nea Paphos and its agora. In addition, the morphogenetic processes that shaped the coastal plains of the Cypriot area were also determined and a research hypothesis that could explain the shrinking of the bay and the decline of the harbour north of the cape of Paphos was formulated. The Mala GPR (Ground Penetrating Radar) ProEx System, which is compatible with shielded antenna of 500MHz, was used for the geophysical survey of the area. 95 profiles were completed in a northsouth direction (1m apart) and 51 in an eastwest direction (2m apart). One of the main difficulties was to distinguish the stone structures, as the bottoms of their walls were formed at the natural level of the rock and there were pebble layers located above them. Using versatile geophysical techniques, we have attempted to answer a couple of questions: Was the agora area a fully built-up one and what does the continuation of the walls into undiscovered sections of the agora signify?

5

Geophysical approach for assessment of seawater intrusion in the coastal aquifer of Wadi Nador (Tipaza, Algeria)

63%

Bouderbala A. , Remini B.

Acta Geophysica

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2014

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tom Vol. 62, no. 6

1352--1372

EN

The aquifer of Nador has suffered significant salinization due to seawater intrusion. It was strongly exploited during the 1980s and 1990s. A piezometric analysis in April 2012 showed the piezometric level to lie at 0 m a.s.l. over the plain; as a result, this aquifer is highly sensitive to the marine intrusion with an electrical conductivity of the groundwater in of exceeds 2500 μS/cm and so there are no abstractions for irrigation or drinking purpose from these sectors. The geoelectric study also showed the lateral variation in the electrical resistivity for two moments separated in time by more than 45 years. The fall in resistivity may be due to the encroachment of seawater into previously freshwater zones and/or infiltration during the era of pumped abstractions downstream. The resistivity surveys reveal two distinct sectors: the saturated aquifer in brackish and saltwater having resistivity values to 36-10 Ωm, which extends nearly 1600 m inland.

6

An integrated geoarchaeological approach to late Iron Age settlement at Haštelina hillfort (Lopar, Island of Rab, Croatia) using Amplitude Data Comparison (ADC) method and trial excavation

63%

Androić Gračanin P. , Welc F. , Konestra A. , Nowacki B.

Polish Archaeology in the Mediterranean

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2020

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tom 29(2)

447-468

EN

Geophysical prospection and small-scale archaeological excavation were undertaken on the site of Kaštelina, a Late Iron Age hillfort settlement located on the Stolac promontory in the eastern part of Rab island (Kvarner Gulf, Croatia). Within the frame of the “Archaeological topography of the island of Rab” program, a Polish–Croatian team applied a series of multidisciplinary methods to study the occupational history of the site, its preservation, the nature of selected site features and future research potential. Ground-penetrating radar and magnetometer surveys, combined with the implementation of the Amplitude Data Comparison (ADC) method, led to the detection of remains of Late Iron Age building structures distributed over the northwestern side of the Stolac promontory. Archaeological excavations verifying the findings of the geophysical survey resulted in the discovery of a dwelling with associated outdoor features. A preliminary assessment of the outcome of a multidisciplinary approach to the study of the site of Kaštelina emphasizes the importance of the collected data for a general understanding of Late Iron Age settlements and their internal organisation in a wider context.

7

Zagrożenia pogórnicze na terenach dawnych podziemnych kopalń węgla brunatnego w rejonie Piły-Młyna (województwo Kujawsko-Pomorskie)

63%

Kotyrba A. , Frolik A. , Kortas Ł. , Siwek S.

Przegląd Górniczy

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2012

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tom T. 68, nr 7

58--66

PL

W artykule przedstawiono analizę warunków geologiczno-górniczych na terenach dawnych podziemnych kopalń węgla brunatnego w miejscowości Piła-Młyn w Gminie Gostycyn (województwo Kujawsko-Pomorskie, powiat Tucholski). Pod koniec XIX i w I połowie XX wieku w dolinie rzeki Brdy intensywną eksploatację złoża węgla brunatnego prowadziło kilka kopalń. Obecnie na części terenów pokopalnianych zlokalizowano osiedle domów jednorodzinnych. Powstanie w roku 2006 zapadliska powierzchni zaniepokoiło mieszkańców. W konsekwencji tego zdarzenia w latach 2008÷2009 na terenie osiedla przeprowadzono badania geofizyczne i geologiczne opisane w artykule.

EN

The article presents an analysis of geological and mining conditions in areas of former underground brown coal mines in Piła-Młyn (Kuyavian-Pomeranian Voivodeship, Tuchola administrative district). At the end of the 19 th and in the first half of the 20 th century several mines have conducted intense brown coal deposit extraction in the valley of the Brda river. Nowadays in a part of post-mining areas a housing estate of single family houses was located. The arisen in 2006 surface depression has alarmed the inhabitants. As a consequence of this event between 2008 and 2009 in the area of the housing estate geophysical and geological surveys described in the article were performed.

8

Magnetic field map of the Wilhelm Archipelago shelf zone, West Antarctica

63%

Bakhmutov V. , Yegorova T. , Bakarzhiyeva M. , Mytrokhyn O. , Shpyra V. , Orlyuk M. , Maksymchuk V. , Tarasov V. , Romenets A. , Nakalov Y. , Brillinh Y. , Romanyuk O. , Otruba Y. , Litvinov D.

Acta Geophysica

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2024

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tom Vol. 72, no. 3

1693--1712

EN

The Antarctic Digital Magnetic Anomaly Project is an international research effort to construct a magnetic map of the continent based on ground, satellite, marine, and aeromagnetic surveys. This paper reports the magnetic mapping of the shelf zone in the SE part of the Wilhelm Archipelago, West Antarctica, based on magnetic surveys conducted with Zodiac boats. A spectacular feature of this area is the strong magnetic anomaly of the Antarctic Peninsula (AP) batholith, which was the product of subduction-related Mesozoic-Cenozoic arc magmatism on the former margin of Western Gondwana. We constructed and analyzed a detailed magnetic map of magnetic field anomalies using field observations of rock exposures on the islands and magnetic properties of rocks from laboratory data. The oldest volcanic rocks of Jurassic to Lower Cretaceous age relate to N-NE trending bands of negative magnetic field. The largest feature in the study area is an Upper Cretaceous/ Paleogene granodiorite complex that produces a positive magnetic anomaly. Many smaller anomalies are also present over gabbroid bodies of Cretaceous age. Two-dimensional magnetic modeling shows that heterogeneities in the upper crust may have magnetic susceptibilities in the range of 0.005-0.13 SI. Magnetic field anomalies also delineate an orthogonal system of tectonic faults, including the main NE fault along the Penola Strait (sub-parallel to the AP coastline) and four intersecting faults. These fault systems may be associated with different stages of continental margin evolution along the Antarctic Peninsula.

9

Inwersyjne obrazowanie oporu w rejonie złoża Zn-Pb Zawiercie Źródłem informacji na temat budowy geologicznej

63%

Cabała J. , Jochymczyk K. , Poręba A.

Przegląd Geologiczny

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2007

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tom Vol. 55, nr 10

380-386

EN

The depletion of Zn-Pb ores in developed mining areas and the increase in metal prices have resulted in the need to search for new deposits which have not been exploited yet. A project of drilling new exploratory boreholes should be preceded by an interpretation of archival geological data. To obtain the most valuable information on the geological structure leading to its plausible interpretation, it seems to be purposeful and advisable to apply some geophysical methods that are reasonably cheap in comparison with others. The method of electrical resistivity tomography, which in this research uses two of many measurement protocols such as Schlumberger array and dipole-dipole array, is particularly useful. Computer interpretation of geophysical results allows a high resolution 2D and 3D geoelectrical model of rock mass to be created. The study was carried out using the multi-electrode Lund Imaging System manufactured by ABEM, Sweden. In order to evaluate the practical application of this method, Zawiercie Zn-Pb ore deposits were chosen as the area used in previous scientific research. Taking into account mineralization in its economic aspect, the deposits occur at relatively shallow depths of 50-120 m. In the investigated region, the Triassic carbonate formation overlays the Devonian rocks. The Keuper low-resistance clay, occurring on the surface, provides a very good electrical contact between an electrode and the soil. This is why there are favourable measurement conditions in this area. The boundaries between the Keuper, Devonian and Triassic formations are clearly noticeable in the resistivity cross-sections obtained. On the basis of the ERT results, it is possible to locate faulting zones as well as karst systems. One of the profiles clearly shows the occurrence of a low-resistance anomaly correlated with Zn-Pb mineralization, which was confirmed by borehole surveys. However, this early stage of the research with the use of the ERT method cannot unequivocally identify the ore body, particularly as it was conditioned by the limited depth of prospecting.

10

Karstic landscape detection using electrical resistivity tomography in northeast Algerian

63%

Brahmi S. , Hadji R. , Chemseddine F. , Brahmi S. , Hamad A. , Hamed Y.

Geomatics, Landmanagement and Landscape

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2022

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tom no. 3

103--115

EN

Sinkhole (doline) collapse is one of the major natural hazards threatening people and property in the Middle East and North Africa (MENA) region, especially if the bedrock structure is epi-karstic, covered by encrusted material. Many dolines-avens collapses have been recorded in urban and rural areas in Northeast Algeria. Our study identifies localized deformation that may be caused by a sinkhole activity based on the electrical resistivity tomography (ERT) imaging in Setifian high plains. For this task, we conducted 2-D Wenner and Wenner-Schlumberger transects profiles. The geological and hydrogeological study helped to calibrate the resistivity model, and in this regard, expound on the proneness of the limestone layer to collapse. The obtained model highlights the heterogeneity of the subsurface. The inverted transects allowed the investigation of 20 m depth with Wenner array and 52 m with Wenner-Schlumberger. The Wenner inverted models imaged the chimney and different karst networks until 20 m depth; even as the Wenner-Schlumberger models imaged a new karstic cavity in the limestone layer. ERT imaging has once again proven its effectiveness in mapping sinkholes based on its ability to detect resistivity. Our research can certainly benefit karst collapse monitoring in other areas of the high plain region.

11

Zastosowanie badań geofizycznych do rozpoznawania warunków geologicznych otoczenia złoża hydrogeotermalnego w masywie krystalicznym w rejonie Lądka-Zdroju

51%

Stefaniuk M. , Ostrowski C. , Sada M. , Cygal A.

Technika Poszukiwań Geologicznych

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2017

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tom R. 56, nr 2

131--146

PL

Rejon Lądka Zdroju jest od kilkuset lat znany z występowania i wykorzystywania ciepłych źródeł. Złoże wód geotermalnych występuje tutaj w specyficznych warunkach geologicznych charakterystycznych dla obszaru sudeckiego. Ma ono charakter szczelinowy i występuje w warunkach naporowych. Rozwój Uzdrowiska spowodował potrzebę lepszego rozpoznania złoża hydrogeotermalnego i jego geologicznego otoczenia. W ramach zrealizowanego programu badań wykonane zostały również badania geofizyczne zorientowane na rozpoznanie ogólnych warunków geologicznych złoża i jego otoczenia. Zastosowane zostały metody: magnetyczna, grawimetryczna i geotermiczna, profilowania VLF, sondowania i profilowania elektrooporowe oraz ciągłe profilowania magnetotelluryczne. W ramach prezentowanej pracy wykonany został przegląd wcześniejszych badań geofizycznych oraz wykonano reinterpretację danych magnetotellurycznych z włączeniem interpretacji danych grawimetrycznych. Reinterpretacja obejmowała przegląd prac pomiarowych, weryfikację procedur i wyników przetwarzania danych pomiarowych oraz została zweryfikowana i rozszerzona interpretacja krzywych sondowań w tym inwersyjne modelowania dwuwymiarowe. Badania te pozwoliły na wyinterpretowanie stref uskokowych, wykrycie anomalii temperaturowych i w bardzo ograniczonym stopniu rozpoznanie przestrzenne szczelinowych poziomów wodonośnych.

EN

The Lądek-Zdrój area has been known for several hundred years as a place of occurrence and use of hot springs. A hydrogeothermal reservoir occur there in specific geological conditions characteristic for Sudetes area. The reservoir is of a fracture type and occurs in artesian conditions. The development of the Health Resort caused the need for the better recognition of the hydrogeothermal reservoir and its geological vicinity. The carried out investigation program included, among others, a geophysical survey for the recognition of general geological conditions of the reservoir and its vicinity. The magnetic, gravity and surface geothermic methods were applied as well as VLF profiling, resistivity profiling and soundings and continuous magnetotelluric profiling. The review of the earlier geophysical surveys and reinterpretation of the magnetotelluric data including gravity data were made within the framework of the presented paper. The reinterpretation works a included review of data acquisition, the verification of procedures and results of data processing as well as verification and an extended interpretation of the sounding curves with use of inverse 2D modeling. As results of the survey tectonic zones were interpreted and temperature anomalies were discovered and, within a limited range, space recognition of the fractured aquifer horizons was made.

12

Wykorzystanie archeologii w konserwacji zabytkowych parków i ogrodów

38%

Dix B.

Ochrona Zabytków

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2016

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nr 1

93-103

PL

Badania archeologiczne, jako przejaw interdyscyplinarnego podejścia do tematu zabytkowych parków i ogrodów, pozwalają na poznanie ewolucji tych założeń oraz odkrycie ważnych dla ich historii obiektów. Możliwości są duże: od wstępnej kwerendy z użyciem zdjęć lotniczych, starych map i innych materiałów źródłowych, przez badania terenowe oraz nieinwazyjne badania geofizyczne, aż do dokładnych badań wykopaliskowych. Wyniki mogą posłużyć za podstawę w trakcie prac restauracyjnych, umożliwić wierną rekonstrukcję, wspomóc naukowymi dowodami wszelkie projekty i strategie konserwatorskie.

EN

Archaeological investigation as part of a cross-disciplinary approach is an important means to trace the evolution and significant features of historic parks and gardens. Its scope ranges from background studies using aerial photographs, historical maps and other records, through analytical fieldwork and non-intrusive geophysical surveys to detailed excavation. The results can be used as the basis for accurate restoration, repair and reliable reconstruction in addition to informing conservation management plans and policies.