Relationships between magnetic and structural fabrics revealed by Variscan basement rocks subjected to heterogeneous deformation—a case study from the Kłodzko Metamorphic Complex, Central Sudetes, Poland

Kądziałko-Hofmokl, Magdalena; Mazur, Stanisław; Werner, Tomasz; Kruczyk, J.

doi:10.1144/gsl.sp.2004.238.01.24

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…The LSBC was formed in an upper-Devonian crypto-volcanic caldera where limnetic Carboniferous sedimentation has taken place [40]. The following geological units are identified here: the Wolibórz Syncline, the Czerwieńczyce Graben, the Nowa Ruda-Bożkowa gabbro-diabase Massif, the Nowa Ruda Syncline (with the southernmost part called the Słupiec Basin), theŚcinawka Uplift [41][42][43].…”

Section: Study Areamentioning

confidence: 99%

Groundwater Chemistry and Stratification in the Flooded Hard-Coal Mine Shaft “Nowy I” (Nowa Ruda Region, SW Poland)

Chudy

Worsa-Kozak

Wójcik

2020

Water

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The flooding of unprofitable underground mines is one of the methods of their closure. After the drainage of the mine has stopped, the voids left in the rock mass as a result of mining, are filled with inflowing groundwater. In this way, reservoirs of groundwater with specific physicochemical parameters are formed. These parameters depend on the interaction of the water flowing into the workings with the rock formations. It was the economic situation in the 1990s that led to the closure of hard coal mines in the Nowa Ruda Coal Basin, where the flooded “Nowy I” shaft is located. In that shaft, in 2008, hydrogeological research was performed and groundwater samples from five various depths were collected. The aim of the study was to recognize if groundwater stratification occurs in the shaft. In 2015, a sample of the water outflowing through the “Aleksander” adit was taken to check the potential influence of mine flooding on the environment and to confirm the changes in groundwater chemistry over time. These were the first, and so far, the only studies on the chemical composition of water in the flooded mine in that area. The article presents results of the preliminary research, which confirmed the existence of not obvious hydrogeochemical stratification in the shaft. It can be assumed that below the depth of 350 m, the water circulating through mining excavations exhibits the highest electrical conductivity and the highest concentration of Ca2+, K+, SO42−, Fetot. In the depth range of 320–380 m there is a transition zone, in which a decrease of Eh value and a change of reduction and oxidation is recorded. Above this zone, infiltration water inflow, from outside the shaft casing, dominates. The research shows that it would be necessary to perform additional sampling of the water in the shaft at greater depths, as well as to perform isotope analysis and periodical tests for at least several years. This would allow for a more complete characterisation of hydrogeochemical processes taking place in the flooded mine.

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Section: Study Areamentioning

confidence: 99%

Groundwater Chemistry and Stratification in the Flooded Hard-Coal Mine Shaft “Nowy I” (Nowa Ruda Region, SW Poland)

Chudy

Worsa-Kozak

Wójcik

2020

Water

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“…1993a, b) and hysteresis studies of tektites (Werner and Borradaile 1998). After returning to Poland he focused on the applicability of methods of magnetic fabrics (AMS, AARM) for tectonic problems for the Sudetes (Jeleńska et al 1996;Werner 1997;Jeleńska and Werner 1997;Jeleńska et al 2000;Jeleńska et al 2002a, b;Kądziałko-Hofmokl et al 2004;Werner and Białek 2004). The problems of anisotropy served as a basis of his dissertation performed under supervision of M. Jeleńska (Werner 2002).…”

Section: The Next Stage Of Palaeomagnetic Laboratory In a Newmentioning

confidence: 99%

Fifty Years of Palaeomagnetic Studies in the Institute of Geophysics, Polish Academy of Sciences

Kądziałko-Hofmokl

Werner

Kruczyk

2014

Achievements, History and Challenges in Geophysics

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Palaeo-and archaeomagnetic investigations in the Institute of Geophysics were initiated at the beginning of 1960s. The archaeomagnetic study was performed in the Geomagnetic Observatory in Hel till the mid-1980s and was resumed lately in the Warsaw laboratory. Palaeomagnetic study begun in 1963 but the palaeomagnetic group obtained necessary place for the laboratory in the Central Geophysical Observatory in the newly finished building in Belsk later in 1966. Formally, the Paleomagnetic Laboratory was established in 1972. From the very beginning, palaeomagnetic studies were accompanied by studies of magnetic properties of rocks and minerals-carriers of natural remanence and by measurements of magnetic susceptibility and its anisotropy. Therefore, the laboratory became successively equipped with the apparatus for strictly palaeomagnetic study (astatic and spinner magnetometers and demagnetizing devices) as well as with devices for rock-magnetic investigations (apparatus for thermoanalysis, system for measuring of hysteresis parameters and for study of magnetic remanence at low temperatures, torsion balance, device for study of magnetic properties under mechanical stress and temperature, device for study of alterations of magnetic minerals based on thermally stimulated emission of exo-electrons (TSEE). The last three devices have not been in use for several years. At the end of 1980s, the Institute moved to a new building and the whole laboratory was moved to Warsaw. Moving palaeomagnetic measurements to town was possible due to the replacement of spinner magnetometer by the cryogenic magnetometer SQUID, which is much more sensitive and less affected by the urban disturbances. Computer software packages that are written in the Institute or obtained from their inventors became a great help in the interpretation of experimental results. Palaeomagnetic investigations have been performed in our laboratory on rocks of various origins and age, coming from various regions of Poland and other countries often in cooperation with scientists from foreign laboratories. Numerous palaeomagnetic results that are obtained in our laboratory are in

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“…A primary fabric later affected by a strong compression event and resulting in a tectonic foliation, a flexural folding, shearing (i.e., thrust related) and/or flattening, may become partially (composite fabric) (Debacker et al, 2004) or totally (new compressive fabric) overprinted (Mamtani et al, 1999;Kadzialko-Hofmokl et al, 2004;Anderson and Morris, 2004;Mukherji et al, 2004;Mamtani and Sengupta, 2010). The imprint of these different tectonic events on the fabric can be studied using AMS data.…”

Section: Introductionmentioning

confidence: 99%

New insights into asymmetric folding by means of the anisotropy of magnetic susceptibility, Variscan and Pyrenean folds (SW Pyrenees)

et al. 2018

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The main goal of this work is to compare the magnetic fabric and field structural observations of the limbs of seven asymmetric folds in the Pyrenees to determine the differences of internal deformation as well as the folding kinematics. The magnetic fabric allows to unravel the petrofabric of these folded sedimentary rocks with scarce strain markers. Three folds developed during the Variscan Orogeny in Ordovician and Devonian rocks, and four folds developed during the Pyrenean Orogeny in Eocene rocks, were studied. Folds show a variety of structural locations, in different thrust sheets of the Southern Central Pyrenees, different cleavage development, age, geometry and lithology. Sampling follows an equivalent lithological layer in the two limbs except in one case of the selected folds. A modified tectonic magnetic fabric is found in most sites showing the magnetic lineation (k max) on the tectonic foliation plane. A larger scattering of the k max axes and a higher intensity of the preferred orientation of minerals (eccentricity of the AMS ellipsoid) is better observed in the overturned (short) limb of the asymmetric Variscan folds than in the normal (long) limb, while shape parameter in Alpine folds is generally larger in the overtured (short) limb respect to the normal (long) one, a good clustering of k min axes is observed in all limbs. The combination of the AMS data with the structural data helps to understand and better constrain the deformation degree in these asymmetric folds and to unravel the deformational history.

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Relationships between magnetic and structural fabrics revealed by Variscan basement rocks subjected to heterogeneous deformation—a case study from the Kłodzko Metamorphic Complex, Central Sudetes, Poland

Cited by 7 publications

References 15 publications

Groundwater Chemistry and Stratification in the Flooded Hard-Coal Mine Shaft “Nowy I” (Nowa Ruda Region, SW Poland)

Groundwater Chemistry and Stratification in the Flooded Hard-Coal Mine Shaft “Nowy I” (Nowa Ruda Region, SW Poland)

Fifty Years of Palaeomagnetic Studies in the Institute of Geophysics, Polish Academy of Sciences

New insights into asymmetric folding by means of the anisotropy of magnetic susceptibility, Variscan and Pyrenean folds (SW Pyrenees)

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