Goldex
Val-d'Or, Quebec (Abitibi greenstone belt), Canada
Orogenic goldAu
- Type
- Orogenic gold in a quartz-tourmaline-carbonate vein stockwork in quartz diorite
Mine of the Val-d'Or vein field: quartz-tourmaline-carbonate (QTC) veins in shear zones. Daver et al. (2020): three-phase paragenesis, early gold and pyrite under reducing conditions, tourmaline and barite under an oxidizing fluid, then barren As-Co-Ni cubic pyrite; district tourmaline δ11B from -15.6 to -7.7 ‰, lighter to the west, mixing of a deep metamorphic fluid and a supracrustal fluid. Stockwork in a 0.1-0.25 by 3.8 km quartz diorite intrusion within Jacola Formation metabasalts, 1.5 km north of the Cadillac-Larder Lake fault; albite-sericite then biotite-chlorite haloes.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −14.7 ± 0.6 ‰ | −15.6 / −13.9 ‰ | 8 | stockwork vein tourmaline (sample 91, drill core, 134 m) Mean and standard deviation recalculated from 8 analyses, -15.6 to -13.9 (1 -15.6; 2 -14.9; 3 -13.9; 4 -14.8; 5 -15.1; 6 -14.4; 8 -14.1; 7 -14.4). Published mean -14.6 ± 0.5 ‰. Lightest values of the district. | Daver et al. (2020), Three-stage formation of greenstone-hosted orogenic gold deposits in… |
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Cite this page
IsoFind Atlas (2026). Goldex, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/goldex/ (accessed 2026-10-20).
@misc{isofind2026goldexisotopesignatures,
title = {Goldex, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/goldex/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20