Zersetzung von Kalk-Alkali-Gesteinen im rezenten Fumarolengebiet auf Nea Kameni/Santorin/Griechenland |
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| Authors: | Dr Hasso Schorin |
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| Institution: | 1. Instituto Venezolano de Investigaciones Cient?ficas, Aptdo 1827, Caracas 101, Venezuela
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| Abstract: | In the present phase of the volcanic activity on Nea Kameni / Santorini / Greece the calc-alkalic volcanic rocks are decomposed by H2O, CO2 and SO2 gases of about 100 °C. Using a method ofGresens (1967) for the determination of gains and losses of compounds five different processes could be distinguished: - leaching of compounds
- enrichment of Ca as gypsum
- increase of Fe2O3 (6%–11%), TiO2 (0,8%–3%) and Zr
- enrichment of Al2O3 (15%–29%), TiO2 (0,8%–1,5%) and K
- increase of Al2O3 (15%–26%), Fe2O3 (6%–9%), TiO2 (0,8%–1,3%), Sr, Ba, Pb and Zr
Finally a model for the process of decomposition of calc-alkalic volcanic rocks by sulfuric acid was developed. |
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