Florcita
Bongará area, Amazonas (northern Peru), Peru
Mississippi Valley TypeZn-Pb
- Type
- Mississippi Valley-type (MVT)
Zn-Pb prospect with black and reddish-brown sphalerite in Pucará Group carbonates, about 16 km south-south-east of Pedro Ruiz. Sulfur derives from thermochemical reduction of dissolved sulfate (Cretaceous seawater, evaporites of the Chambará-Condorsinga or Sarayaquillo formations). Heavy, clustered values, close to the source sulfate. Indicative coordinates.
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 13.7 ± 2.6 ‰ | 9.2 / 16.2 ‰ | 6 | pre-ore pyrite Published mean, standard deviation and range (Table 1), 6 in situ analyses; median 14.3 ‰. | Basuki et al. (2008), Sulfur isotope evidence for thermochemical reduction of dissolved s… |
| 10 ± 3 ‰ | 6 / 13 ‰ | 5 | ore-stage pyrite Published mean, standard deviation and range (Table 1), 5 in situ analyses; median 11.0 ‰. | Basuki et al. (2008), Sulfur isotope evidence for thermochemical reduction of dissolved s… |
| 15.5 ± 1.8 ‰ | 11.1 / 19.3 ‰ | 32 | sphalerite 1 Published mean, standard deviation and range (Table 1), 32 in situ analyses; median 15.9 ‰. The abstract gives +6.2 ‰ as minimum; Table 1 and the text give +11.1 ‰. | Basuki et al. (2008), Sulfur isotope evidence for thermochemical reduction of dissolved s… |
Deposits of the same type
- Florida Canyon Peru
- San Vicente Peru
- Central and East Tennessee MVT United States
- Southern Appalachians MVT United States
- Northern Arkansas district United States
- Tri-State district United States
- Upper Mississippi Valley district United States
- Gays River Canada
Cite this page
IsoFind Atlas (2026). Florcita, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/florcita/ (accessed 2026-10-13).
@misc{isofind2026florcitaisotopesignatures,
title = {Florcita, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/florcita/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13