LUMINESCENCE AND ESR OF THE NATURAL ALKALI FELDSPARS, EXTRACTED FROM SEDIMENTS, DOPED BY PROBE IMPURITIES

Natural alkali feldspars extracted from sediments were doped by probe impurities (Eu, Ag, Cu) whose behaviour has been studied in other crys tal matrices. On the basis of luminescence and ESR characteristics of the doped minerals, and using analogy with other systems, it is conclu ded that Eu2+ and Agi centres were created in alkali feldspars. It is established that thermal and optical depopulation of traps, actual for luminescence dating, leads to subsequent electron recombination proce sses.