The Challenger gold deposit in South Australia is hosted by pelitic migmatites that underwent peak metamorphism at ∼7.5 ± 1.5 kbars and at least 800°C. Nd model ages suggest a protolith age of ∼2900 Ma. Zircon U-Pb and garnet Sm-Nd dating indicates
No takes yet. Share an insight, caveat, or question.
Tomkins et al. (2002) studied this question.