M. Soufek et al., DISTRIBUTION OF LEAD ISOTOPES IN WULFENITE FROM ALLCHAR, MACEDONIA, Neues Jahrbuch fur Mineralogie Monatshefte, (10), 1998, pp. 462-468
Wulfenite is determined in the well known thallium deposit Allchar, Ma
cedonia. This is the first discovery of lead mineral in the deposit. M
easured Ph isotopic ratios: Pb-206/Pb-204 = 18.327-18.378, Pb-207/Pb-2
03 = 15.675-16.634, Pb-208/Pb-204 = 38.494-38.584, show a common lead
type. The lead present in the wulfenite is due to a previous decay of
U and Th and not as a result of transformation Tl-205 to Pb-205 caused
by interaction of neutrino with Tl.