Geochemische Untersuchungen an Travertinen der Slowakei |
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| Authors: | R Demovi? J Hoefs K H Wedepohl |
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| Institution: | (1) Geochemisches Institut der Universität Göttingen, Bundesrepublik Deutschland;(2) Present address: Geologisches Institut der Slowakischen Akademie der Wissenschaften,  tefanikova 41, Bratislava,  SSR |
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| Abstract: | Travertines are characterized by high rates of deposition. Waters from which travertines are precipitated have more than ten times the calcium concentration of mean continental surface waters. Calcium has been dissolved at some depth as sulfate and as carbonate the latter in bicarbonate rich waters.38 samples from the important travertine deposits of Slovakia have been analyzed for the major elements including sulfate and 4 minor elements (Sr, Mn, Zn, Cu). Strontium and magnesium are correlated with the sulfur content. Due to its isotopic composition sulfate can be of Triassic origin. 9 out of 16 spring waters from the areas of travertine deposition contain more than 1000 ppm HCO
3
–
+H2CO3 and 10 out of 16 more than 500 ppm SO
4
2–
. A high carbonate content of waters is correlated with isotopically heavy carbon of travertines. Heavy carbonate carbon occurs also in travertines from CO2 discharging areas in Italy, Persia and Jugoslavia. A magmatic or metamorphic source of carbon dioxide can be considered for the carbonate of the majority of the Slovakian travertine deposits.
Die Arbeiten, die von Dr. R. Demovi durchgeführt worden sind, wurden aus Mitteln der Humboldstiftung unterstützt. Für die großzügige Hilfe sei hiermit der Stiftung gedankt. Die Autoren sind ferner den Herren Dipl. Ing. O. Franko und Dipl. Ing. S. Gazda vom Geologischen Institut Diony  tùr, Bratislava,  SSR, zu besonderem Dank verpflichtet, da sie die Wasseranalysen beigetragen haben. Herr Dr. Carlo Savelli stellte freundlicherweise die Proben aus Tivoli bei Rom, Herr Dr. Bernhard Damm (Heidelberg) die Proben aus Persien und Herr Dr. Friedrich Lippmann die Proben aus Wolfegg und Cannstatt zur Verfügung. |
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