The results of deep geomagnetic soundings in the West Carpathians

Jankowski, J; Tarłowski, Z.; Praus, Oldřich; Pěčová, Jana; Petr, Václav

doi:10.1111/j.1365-246x.1985.tb05111.x

Cited by 31 publications

(18 citation statements)

References 6 publications

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“…Since the discovery of the Carpathian Conductivity Anomaly (CCA) (Jankowski 1967), a great number of studies have been carried out to acquire new data and to understand the nature of the conductivity anomaly (e.g., Á dám et al 1997;Jankowski et al 1985;Č erv et al 1997a, b, 2001Ernst et al 2002;Jóźwiak and Ernst 2005 ;Kováčiková et al 2005a, b;Rokityansky and Ingerov 1999;Zhdanov et al 1986). Jankowski et al (2005) have recently summarized the research related to CCA and summarize well-established facts and their interpretation.…”

Section: Magnetotelluric Studies In the Alpine Fold Belt And Variscidesmentioning

confidence: 98%

How is the European Lithosphere Imaged by Magnetotellurics?

Korja

2007

Surv Geophys

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I review recent investigations on the electrical conductivity of the lithosphere and asthenosphere in Europe. The principal method in the reviewed studies is the magnetotelluric method, but in many cases other electromagnetic methods (e.g., magnetovariational profilings and geomagnetic depth soundings) have provided additional information on subsurface conductivity or have been the primary method. The review shows that the magnetotelluric method has been used, and is being used, in all kinds of environments and for many different processes shaping the crust and lithosphere. The crust is very heterogeneous, both with respect to the scale of conductive/resistive features and interpretations: research targets vary from Archaean palaeostructures to ongoing processes. The European database of the depth to the lithosphere-asthenosphere boundary (LAB) in Europe is updated, and a new map showing lateral variations of the depth of LAB is provided. The compilation shows that (1) the Phanerozoic European lithosphere, with considerable variations (45-150 km), is much thinner than the Precambrian European lithosphere, (2) the Trans-European Suture Zone is a major electrical border in Europe separating electrically (as well as geophysically and geologically in general) two quite different settings, (3) the thinnest lithosphere is found under the extensional Pannonian Basin (45-90 km), (4) in most of the East European Craton there are no indications of a high conductivity zone in upper mantle. In many regions there is no information at all on upper mantle conductivity, which calls for pan-European projects to operate arrays of simultaneously recording instruments with long recording periods (2-8 months) and dense spatial sampling (20-50 km).

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Section: Magnetotelluric Studies In the Alpine Fold Belt And Variscidesmentioning

confidence: 98%

How is the European Lithosphere Imaged by Magnetotellurics?

Korja

2007

Surv Geophys

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“…The first important results were the documentation and preliminary interpretation of the North German-Polish Conductivity Anomaly (FLEISCHER, 1954;SCHMUCKER, 1959;WIESE, 1962WIESE, , 1963JANKOWSKI, 1967) and the Carpathian Conductivity Anomaly (JANKOWSKI, 1967;JANKOWSKI et al, 1985). In these early, pioneering works very simple methods of interpretation were used, sometimes qualitative rather than quantitative.…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Crustal Conductivity Pattern in Central Europe and Its Correlation to Deep Tectonic Structures

Jóźwiak

2011

Pure Appl. Geophys.

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Abstract-The results of magnetovariational (MV) soundings are usually presented in the form of induction arrows. However, many examples show that the horizontal magnetic tensor (HMT) is more informative. The distribution of some HMT invariants directly traces the location of well-conducting rocks in the crust and upper mantle. The HMT determination requires simultaneous observations in an entire region, which is a substantial disadvantage. Yet, it is possible to apply techniques capable of restoring all the magnetic field components necessary for HMT estimation from tipper data arrays alone. These techniques exploit the spatial relationships between electromagnetic field components in a nonconducting atmosphere. For Central Europe, a large data set of induction arrows has been collected by the effort of many groups during the last 50 years. Based on these data, HMT values were calculated, and the results are very significant. The spatial behavior of certain HMT invariants demonstrates the presence of deeply seated, well-conducting rocks in the crust. Anomaly maximums display an arc-shaped trend that may be genetically linked with the Caledonian and/or Variscan margin thrust belts, which developed following the collision between Baltica and Avalonia and/or Gondwana-derived terranes, respectively. This is an important finding because the position of these deformation fronts in relation to the edge of the East European Platform is still controversial.

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“…It seems to be laterally more continuous for the Western and Ukrainian parts than for the Romanian one. The centre of the anomaly coincides more or less (with deviations not larger than 20 km) with the Pieniny Klippen Belt (Jankowski et al 1985;Zhamaletdinov 2005;Fig. 5).…”

Section: The Caledonides and The Precambrian Craton: Tectonic Bordersmentioning

confidence: 99%

“…Jankowski et al (1985), Ernst et al (1997), andJankowski et al (2008) interpreted it as underthrusted cataclastic sediments with saline water in the pore space. Zhamaletdinov (2005) explained it as caused by graphite.…”

Section: The Caledonides and The Precambrian Craton: Tectonic Bordersmentioning

confidence: 99%

“…The Carpathians have been understood as host of a pronounced conductivity anomaly since the early 1970s (Rokityansky 1972) and experienced the vast number of ca. 1200 mostly geomagnetic measurements in the following two decades (Jankowski et al 1985 and citations therein, Stȃnicȃ et al 1999 and citations therein, Zhamaletdinov 2005 and citations therein). As a result, the Carpathian anomaly is extraordinarily well mapped (Wybraniec et al 1999;Nowo_ zyński 2012).…”

Section: The Caledonides and The Precambrian Craton: Tectonic Bordersmentioning

confidence: 99%

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Conductivity Anomalies in Central Europe

Neska

2015

Surv Geophys

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This paper is a review of studies which, by applying the magnetotelluric, geomagnetic deep sounding, and magnetovariational sounding methods (the latter refers to usage of the horizontal magnetic tensor), investigate Central Europe for zones of enhanced electrical conductivity. The study areas comprise the region of the Trans-European Suture Zone (i.e. the south Baltic region and Poland), the North German Basin, the German and Czech Variscides, the Pannonian Basin (Hungary), and the Polish, Slovakian, Ukrainian, and Romanian Carpathians. This part of the world is well investigated in terms of data coverage and of the density of published studies, whereas the certainty that the results lead to comprehensive interpretations varies within the reviewed literature. A comparison of spatially coincident or adjacent studies reveals the important role that the data coverage of a distinct conductivity anomaly plays for the consistency of results. The encountered conductivity anomalies are understood as linked to basin sediments, asthenospheric upwelling, large differences in lithospheric age, and-this concerns most of them, which all concentrate in the middle crust-tectonic boundaries that developed during all mountain building phases that have taken place on the continent.

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The results of deep geomagnetic soundings in the West Carpathians

Cited by 31 publications

References 6 publications

How is the European Lithosphere Imaged by Magnetotellurics?

How is the European Lithosphere Imaged by Magnetotellurics?

Large-Scale Crustal Conductivity Pattern in Central Europe and Its Correlation to Deep Tectonic Structures

Conductivity Anomalies in Central Europe

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