TY - RPRT TI - Do ages of authigenic K-feldspar date the formation of Mississippi valley-type Pb-Zn deposits, central and southeastern United States?: Pb isotopic evidence AU - J. N. Aleinikoff AU - M. Walters AU - Michael J. Kunk AU - P.P. Hearn PY - 1993 DO - 10.1130/0091-7613(1993)021<0073:daoakf>2.3.co;2 UR - https://pubs.usgs.gov/publication/70018304 ID - 70018304 ER -