Palaeomagnetic Dating of Hydrothermal Deposits in Czechoslovakia
Palaeomagnetic analyses of Czechoslovak hydrothermal deposits resulted in the determination of an Alpine (from Upper Jurassic to Palaeogene) age of general hydrothermal mineralization in the Carpathian system (Spissko-gemerske rudohorie region) and in the suggestion of either a Tertiary or Quaternary age of the mineralization in the Bohemian massif (Krusne hory and Slavkovske les region). Previously there was considerable controversy over the ages suggested for one formations, and ages from Upper Palaeozoic to Tertiary had been suggested. Thus the palaeomagnetic age determinations differ from some of the previously accepted ages of some deposits. Palaeomagnetically only deposits of certain genetic type and tectonic development were found to be useful. Quartz-haematite aggregates (so called cinopel)–very common in hydrothermal deposits–were found to be the most suitable material for investigation.