HYC (McArthur River) SEDEX deposit, Australia: First paleomagnetic results

Analysis of pyrrhotite-borne paleomagnetic data from four sites on each limb of a syncline through the supergiant HYC (McArthur River) SEDEX Zn–Pb deposit in Australia indicates that the mineralization is entirely postfolding, formed within ∼15 Myr after deposition at 1640 Ma of the host Barney Creek Formation, and thus is either late syndiagenetic or epigenetic in origin.