3. The Tellus geochemical surveys, results and applications

Ambitions to complete geochemical mapping across the island of Ireland were developed in the 1980s and the first phases began in western Northern Ireland in the early 1990s. Subsequent phases in Northern Ireland and the Republic of Ireland were begun from 2004. The Tellus and Tellus Border geochemical sampling programmes of 2004–12 resulted in the most comprehensive maps of their kind for the nort…