McArthur River (HYC)
McArthur Basin, Northern Territory, Australia
SEDEXZn-Pb-Ag
- Type
- Shale-hosted stratiform Zn-Pb-Ag (SEDEX, clastic-dominated)
Giant deposit (227 Mt at 9.2 % Zn, 4.1 % Pb and 41 g/t Ag) as fine sulfide beds in carbonaceous dolomitic shales of the Barney Creek Formation, at about 1640 Ma. Ore δ66Zn varies little across the deposit, from the centre to the south-eastern fringe: rapid, near-complete zinc precipitation from a saturated fluid of crustal signature, with a faint Rayleigh trend. Mine coordinates.
δ66Zn in ‰ (per mil) Values of the same system
Standard : JMC 3-0749L
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.38 ± 0.06 ‰ | 0.28 / 0.5 ‰ | 13 | ore of orebodies 5 to 8, deposit centre (whole rock) Mean and standard deviation recalculated from 13 samples, Table S1. Central drill core, 196.7 to 219.0 m; zinc from 12.6 to 23.8 %. | Baumgartner et al. (2021), Zinc isotope composition of the Proterozoic clastic-dominated … |
| 0.35 ± 0.05 ‰ | 0.25 / 0.46 ‰ | 25 | ore of orebodies 1 to 8, south-eastern fringe of the deposit (whole rock) Mean and standard deviation recalculated from 25 samples, Table S1. Fringe drill core, 159.4 to 210.9 m; zinc from 0.3 to 21.5 %, more carbonate-rich ore than in the centre. | Baumgartner et al. (2021), Zinc isotope composition of the Proterozoic clastic-dominated … |
| 0.37 ± 0.04 ‰ | 0.31 / 0.41 ‰ | 4 | dolomitic interbeds between the orebodies (whole rock) Mean and standard deviation recalculated from 4 samples, Table S1. Three in the centre, one in the fringe; zinc from 1.2 to 5.0 %. Same signature as the ore. | Baumgartner et al. (2021), Zinc isotope composition of the Proterozoic clastic-dominated … |
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Cite this page
IsoFind Atlas (2026). McArthur River (HYC), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/mcarthur-river-hyc-s489/ (accessed 2026-10-13).
@misc{isofind2026mcarthurriverhycisotopesignat,
title = {McArthur River (HYC), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/mcarthur-river-hyc-s489/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13