Abstract
A comparative lithogeochemical study of mainly surface rocks of the Iberian Pyrite Belt (volcanic-sedimentary sequence) and the East Pontic metallotect (volcanic island arc system with few intercalations of marine sediments) has been performed in order to find facies-independent proximity indicators of massive sulphide mineralizations. As, Sb, Tl, and Na seem to be the most promising indicator elements for primary hydrothermal exhalation and/or alteration haloes. The size of the alteration haloes largely depends on the permeability of the country rocks and is best defined by ratios such as As/Na, Sb/Na, and Tl/Na.
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