Sulphur and lead isotope studies of stratiform Zn-Pb-Ag deposits, Anvil Range, Yukon: basinal brine exhalation and anoxic bottom-water mixing.

The Anvil Range, central Yukan, includes five stratiform Zn-Pb-Ag deposits with measured reserves of 92 200 000 tonnes (4.7% Zn, 3.6% Pb and 50 g/tonne Ag). Isotope studies on sulphur in pyrite, barite and other minerals and lead in galena indicate that the source of the lead is upper crustal and that the deposits were formed in strongly reduced bottom water related to a previously unknown Early Cambrian anoxic event.
The Anvil Range, central Yukan, includes five stratiform Zn-Pb-Ag deposits with measured reserves of 92 200 000 tonnes (4.7% Zn, 3.6% Pb and 50 g/tonne Ag). Isotope studies on sulphur in pyrite, barite and other minerals and lead in galena indicate that the source of the lead is upper crustal and that the deposits were formed in strongly reduced bottom water related to a previously unknown Early Cambrian anoxic event.