Nelson batholith

Magmatogenic Ores. Ores in which the isotopic composition of ore lead is the same as that in the presumably related igneous source at the time of crystallization are good candidates for a magmatogenic origin. Data for this fingerprint are available in support of this mechanism. These ores are usually isotopically uniform with Pb/ " Pb< 19.5 and Pb/ Pb < 39. Examples (Fig. 22) are the ores at Butte, Montana (Doe et al., 1968), Bingham Canyon, Utah (Stacey et al., 1968), and the Nelson batholith, British Columbia (Reynolds, 1967). It must be... 

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