Table 5
Re–Os isotopic age data of molybdenite from the Yangla copper deposit Sample Weight （ g
）
Re（×10-9） 187 Re（×10-9） 187Os（×10-9） Model age（Ma）
Measured 2σ Measured 2σ Measured 2σ Measured 2σ
YL-8 0.01028 55444 440 34847 276 134.3 1.1 230.9 3.2
YL-71 0.02198 67806 617 42617 388 165.7 1.3 233.0 3.4
YL-72 0.03071 22627 183 14222 115 54.53 0.49 229.7 3.3
YL-73 0.03099 20423 177 12836 111 49.22 0.40 229.7 3.3
YL-74 0.03056 31928 291 20068 183 77.25 0.64 230.6 3.4
The molybdenite Re–Os model age was calculated as follows: t = 1/ ln(1 + 187Os/187Re), (187Re) = 1.666 10–11a–1 (Smoliar et al., 1996).
