Revision of the stratigraphy of the Zrenjanin arteisan well borehole

Tivadar Gaudenyi1, Mladjen Jovanovic2
1 Geographical Institute "Jovan Cvijic" SASA, Belgrade, Serbia
2 Chair of Physical Geography, Faculty of Sciences, University of Novi Sad, Serbia

P 1.3 in Fortschritte der Quartärstratigraphie

Zrenjanin is located in the Banat region of Vojvodina (Serbia) on the river Begej. The artesian wells were drilled in the last decades of the 19th century (in case of Zrenjanin between 1893 and 1895) for the quality water supply of the towns of the Great Hungarian Plain.

The analyzed artesian well was drilled in the main square of Zrenjanjin. The stratigraphy based on lithological and malacological data of the 452 m deep borehole material. The analysis done by Kormos and Halaváts behalf of the Geological Institute in Budapest and the results were published in 1914.

The taxonomic revision were done by Krolopp in 1977 after the campaign of the Great Hungarian Plain (of Hungary) drilling project. Krolopp's revision based on Quaternary malacological data more than hundred of analyzed boreholes and exposures in the Carpathian Basin. The revision of the data the interval from 58 to 135 m depth identified as Viviparus boeckhi Horizon (previous it was identified as Paludina beds of “Levantine stage”) and the Paludina beds were identified from 208 to 323 m depth. The fauna subdivided into Paludina beds (Pliocene), Pleistocene deposits with the oldermost Viviparus boeckhi Horizon and Holocen deposits. After the taxnomic revision of Krolopp 8 new molluscs' species of Halaváts should be deleted after the revision.

After the results from explanatory drillings in the Sava riparian in the vicinity of Belgrade the stratigraphical information about polycycle fluvial sediments suggests some stratigraphical changes. The newly established Pleistocene Corbicula biozone should be the biozone (of Lower and Middle Pleistocene warm stages) which were younger than the Paludina beds. The oldermost subzone of the Pleistocene Corbicula biozone should be the Viviparus boeckhi Horizon.

The new changes in the time frame of the Quaternary also supports the opinions from the 1970-s that the youngest parts of the Paludina beds should be Quaternary (Early Pleistocene) age.

Letzte Änderung 29.07.2012