Geologic cross-section showing that where limestone is intruded by igneous rock, copper isotope values are highest near the intrusion. However, where non-calciferous rock is intruded by igneous rock, copper isotope values are lower near the intrusion.
Mathur, R. and Wang, D. Transition metal isotopes applied to exploration geochemistry: insights from Fe, Cu and Zn. Chapter in: Ore Deposits: Origin, Exploration and Exploitation. Eds Robb, L. and Decree, S., Wiley.