A positive correlation between present-day 143Nd/144Nd and 147Sm/144Nd ratios from scheelite samples from the Hollinger-McIntyre-Coniaurum gold deposit of Ontario, Canada, corresponds to an age of 2403 ±47 Ma and may date the age of gold mineralization. Initial isotope ratios of scheelites suggest that the fluid responsible for the scheelite and gold mineralization was probably of mantle origin and that it subsequently interacted with continental crust.

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