Kiaka

Manga-Fada N'Gourma greenstone belt (south-east of the country), Burkina Faso

Orogenic goldAu

Type: Orogenic gold hosted in metamorphosed volcano-sedimentary rocks

Deposit of about 5.8 Moz gold in the Paleoproterozoic domain of the West African Craton, at the intersection of the Markoye shear zone and a NE-trending shear zone; two gold stages: early low-grade disseminated gold coeval with hydrothermal tourmaline (Eoeburnean, 2.20 to 2.13 Ga), then late higher-grade vein gold (Eburnean). Gauriau et al. (2022): tourmalines from -25.1 to -15.1 ‰, formed at about 400 °C; metamorphic fluid from devolatilization of deep muscovite schists (-29.2 ‰).

δ11B in ‰ (per mil) Values of the same system

Standard : NIST SRM 951

Value	Range	n	Mineral or matrix	Source
−17.79 ± 1.32 ‰	−19.78 / −15.1 ‰	31	hydrothermal tourmaline (dravite) of the metamafic rock (KDH291-56.2) Mean and standard deviation recalculated from 31 analyses, -19.78 to -15.10 (grain 2-1 -18.73; grain 2-2 -18.38; grain 2-3 -19.57; grain 2-4 -18.50; grain 2-5 -19.03; grain 2-6 -19.78; grain 2-8 -19.23; grain 2-9 -17.09; grain 2-10 -17.65; grain 2-11 -17.70; grain 2-12 -17.52; grain 2-13 -17.99; grain 2-14 -18.81; grain 2-15 -18.82; grain 2-16 -18.47; grain 2-17 -18.45; grain 2-18 -19.57; grain 2-19 -17.39; grain 2-20 -15.67; grain 2-21 -16.41; grain 2-22 -15.68; grain 2-23 -15.10; grain 2-24 -15.22; grain 2-25 -16.30; grain 3-1 -16.48; grain 3-2 -18.89; grain 3-3 -18.16; grain 3-4 -17.40; grain 3-5 -18.66; grain 3-6 -16.60; grain 3-7 -18.38). The abstract wrongly assigns this range to the metagreywacke; the authors give a -17.8 ‰ mean and a mode near -19.5 ‰.	Gauriau et al. (2022), Chemical and boron isotope composition of tourmaline from the Kiak…
−24.16 ± 0.76 ‰	−25.12 / −22.03 ‰	18	hydrothermal tourmaline (dravite) of the metagreywacke (KDH29-311.8) Mean and standard deviation recalculated from 18 analyses, -25.12 to -22.03 (1 -24.38; 2 -24.83; 3 -24.66; 4 -24.61; 5 -24.61; 6 -24.62; 7 -24.30; 8 -24.81; 9 -24.55; 10 -23.98; 11 -23.12; 12 -24.19; 13 -23.98; 14 -22.03; 15 -23.57; 16 -25.12; 17 -23.16; 18 -24.29). The authors give a -24.2 ‰ mean; Figure 8 names the sample KDH348-44.5.	Gauriau et al. (2022), Chemical and boron isotope composition of tourmaline from the Kiak…

Deposits of the same type

Cite this page

IsoFind Atlas (2026). Kiaka, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/kiaka/ (accessed 2026-10-19).

@misc{isofind2026kiakaisotopesignatures,
  title = {Kiaka, isotope signatures},
  author = {{IsoFind Atlas}},
  year = {2026},
  url = {https://www.isofind.tech/isotopes/en/deposits/kiaka/},
  note = {Accessed 2026-10-19}
}

Updated : 2026-10-19