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, Pb/ 206 Pb ±1? 207 Pb/ 235 U ±1? 206 Pb/ 238 U ±1? Rho 207 Pb/ 206 Pb ±1? 207 Pb/ 235 U ±1? 206 Pb/ 238 U ±1? conc 204 Pb 206 Pb/ 204 Pb U (ppm) Pb

, U/Th JTB2 Isotopic ratios Ages

, Pb/ 206 Pb ±1? 207 Pb/ 235 U ±1? 206 Pb/ 238 U ±1? Rho 207 Pb/ 206 Pb ±1? 207 Pb/ 235 U ±1? 206 Pb/ 238 U ±1? conc 204 Pb 206 Pb/ 204 Pb U (ppm) Pb

, U/Th JTB3 Isotopic ratios Ages

, Pb/ 206 Pb ±1? 207 Pb/ 235 U ±1? 206 Pb/ 238 U ±1? Rho 207 Pb/ 206 Pb ±1? 207 Pb/ 235 U ±1? 206 Pb/ 238 U ±1? conc 204 Pb 206 Pb/ 204 Pb U (ppm) Pb

, U/Th JTB4 Isotopic ratios Ages

, Pb/ 206 Pb ±1? 207 Pb/ 235 U ±1? 206 Pb/ 238 U ±1? Rho 207 Pb/ 206 Pb ±1? 207 Pb/ 235 U ±1? 206 Pb/ 238 U ±1? conc 204 Pb 206 Pb/ 204 Pb U (ppm) Pb

U. Th,

V. Table, Data in italic are contaminated with lead (204Pb greater than or equal to 10 counts per second and/or 206 Pb/ 204 Pb <500), Data in bold are reported on the Tera-Wasserburg diagrams, vol.2

, Uncertainties reported at 1? (absolute), calculated by propagation of all known sources of error, Pb/ 206 Pb ratios measurement following Tera and Wasserburg (1972) and developed in Compston et, 1992.

, U/ 206 Pb ±1? 207 Pb/ 206 Pb ±1? 206 Pb/ 238 U ±1? 206 Pb/ 238 U ±1? U (ppm) Pb* (ppm)

, U/Th KH f206% Isotopic ratios Radiogenic Age

, U/ 206 Pb ±1? 207 Pb/ 206 Pb ±1? 206 Pb/ 238 U ±1? 206 Pb/ 238 U ±1? U (ppm) Pb* (ppm)

U. Th,