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  • Author or Editor: József Vatai x
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Abstract

Among the periodic system's elements, mercury (Hg) is most liable to dispersion and, simultaneously, most liable to secondary enrichment. Consequently, mercury enrichments can occur as a result of a number of geologic as well as anthropogenic processes. If the geologic processes cease, quite extended dispersion halos can form around a former accumulation center.

Hydrothermal mineralization is a typical process giving rise to mercury concentration. As a result, regional mercury impacts can occur in the floodplains of rivers flowing from the mining and heavy industrial regions of Transylvania and Slovakia. Elsewhere, mercury anomalies detectable at the intermediate scale (1:50,000) can be found in the Zemplén and Mátra Mountains and, subordinately, in the Börzsöny Mountains. Typically mercury anomalies develop above major structural lineaments as well, unless they are buried under thick young sediments. A remarkable example is the deep fault separating the Pilis and Visegrád Mountains. Another group of Hg anomalies is caused by well-known mercury contamination sources (Kazincbarcika, Balatonfûzfő), which are truly local: they cannot be detected at the scale of the given study.

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Agrokémia és Talajtan
Authors: Ubul Fügedi, Tamás Pocsai, László Kuti, István Horváth and József Vatai

Magyarország középső részén (a Balaton és a Tisza között) a talajvíz ingadozási zónája felett gyakran vastag mészakkumulációs szint fejlődik ki. Karbonátiszapok válnak ki a Duna–Tisza közi hátság szikes tavainak fenekén is. Az ország egyéb vidékein e folyamatok jelentősége alárendelt. A hátságot felépítő homokot és löszt a Duna hordalékából, a karbonátásványokat pedig a Dunántúli-középhegység porló karbonátos kőzeteiből, a jégkorszakban fújta jelenlegi helyükre a szél. A konszolidált üledékekben az elemek többségének át- és felhalmozódását három folyamat határozza meg: a talajosodás, a lefolyástalan, időszakos tavacskák kialakulása és a kapilláris vízm_o

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Central European Geology
Authors: István Marsi, Ildikó Selmeczi, László Koloszár, József Vatai, Ildikó Szentpétery, Árpád Magyari and László Róth

Abstract

The authors carried out geologic investigations in the Kolontár area in connection with the red mud catastrophe of 4 October 2010, and have acquired more detailed knowledge using geologic mapping methods. This study is an evaluation on the basis of the immediate analyses that were made after the accident and are published in this paper.

Based on their research results the authors find that the alluvial deposits of the Torna Brook are highly inhomogeneous, which is manifested in the variability of stability and bearing capacity. Based on the morphology in the area of Kolontár a small, rhombus-shaped pull-apart basin can be outlined, which can be interpreted as a neotectonic event characterized by a right-lateral fault. However, further detailed research is needed in order to understand what kind of role the geologic environment played in the development of the situation that led to the dam failure.

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