Ladolam (Lihir Island)
New Ireland, Lihir group (Tabar-Lihir-Tanga-Feni arc), Papouasie-Nouvelle-Guinée
Epithermal depositsAu
- Type
- Epithermal and porphyry gold in an alkaline caldera
One of the largest and youngest volcanic-hosted gold deposits (over 40 Moz contained gold), in the post-collisional Tabar-Lihir-Tanga-Feni alkaline arc. McInnes et al. (1999): internal Re-Os isochron of 690 ± 26 ka on sample 101373; ore γOs from +16 to +311, more radiogenic than the metasomatised mantle veins of xenoliths from the nearby Tubaf submarine volcano: part of the Os (and metals) comes from the recycled slab.
187Os/188Os isotope ratio, no unit Values of the same system
Standard : Rapport absolu, sans standard de référence
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.25933 ± 0.17934 | 0.14762 / 0.52453 | 4 | gold ore (biotite and K-feldspar altered breccias) Mean and standard deviation recalculated from 4 analyses, 0.14762 to 0.52453 (101201-1 0.14762; 101201-2 0.15176; 101373-1 0.52453; 101373-3 0.21340). Os 0.02 to 0.16 ppb, Re 7.2 to 94 ppb; 2σ: 101201-1 ± 45; 101201-2 ± 75; 101373-1 ± 1157; 101373-3 ± 320. Young ore (under 1 Ma): measured ratio close to initial. 101373: biotite basaltic breccia from the Minifie area; 101201: heterolithic breccia from the Lienetz area. | McInnes et al. (1999), Osmium isotope constraints on ore metal recycling in subduction zo… |
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Cite this page
IsoFind Atlas (2026). Ladolam (Lihir Island), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/ladolam-ile-de-lihir/ (accessed 2026-10-20).
@misc{isofind2026ladolamlihirislandisotopesign,
title = {Ladolam (Lihir Island), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/ladolam-ile-de-lihir/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20