Lead Isotope Variation with Growth Zoning in a Galena Crystal

Science  01 Nov 1963:
Vol. 142, Issue 3592, pp. 574-576
DOI: 10.1126/science.142.3592.574


A large crystal of lead sulfide from Picher, Oklahoma, has significant differences in isotopic composition of lead in successive growth zones. Lead isotope ratios in the parent ore-fluid evidently changed with time during crystal growth. The growth history of this crystal, interpreted quantitatively, points to a tentative hypothesis of genesis of Mississippi Valley deposits of lead and zinc.