Mike (Carlin Trend)
Nevada, Carlin Trend, United States
Other hydrothermalAu (Cu, Zn)
- Type
- Carlin-type gold deposit with a supergene sphalerite blanket
Late Eocene Carlin-type gold deposit rich in copper and zinc, oxidised in the Early Miocene then buried. Below the base of oxidation, a supergene framboidal sphalerite blanket (over 400,000 t zinc) was precipitated by sulfate-reducing bacteria, with δ34S among the lowest ever measured. Indicative coordinates.
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 1.56 ‰ | 1 | dark hypogene sphalerite One conventional analysis; SHRIMP gives +1.6 to -9 ‰. | Bawden et al. (2003), Extreme 34S depletions in ZnS at the Mike gold deposit, Carlin Tren… | |
| 5.2 / 11.8 ‰ | 4 | hypogene pyrite (all types) Range of 4 samples; supergene sulfate estimated at about +8 ‰. | Bawden et al. (2003), Extreme 34S depletions in ZnS at the Mike gold deposit, Carlin Tren… | |
| 11 ‰ | 1 | orpiment One conventional analysis. | Bawden et al. (2003), Extreme 34S depletions in ZnS at the Mike gold deposit, Carlin Tren… | |
| 8.4 ‰ | 1 | stratiform pyrite and sphalerite One conventional bulk analysis. | Bawden et al. (2003), Extreme 34S depletions in ZnS at the Mike gold deposit, Carlin Tren… | |
| −33.3 / −25.1 ‰ | 3 | mixtures with about 30 % framboidal sphalerite Range of 3 samples analysed conventionally. | Bawden et al. (2003), Extreme 34S depletions in ZnS at the Mike gold deposit, Carlin Tren… | |
| −70 / −25 ‰ | supergene framboidal sphalerite (SHRIMP) Range of in situ analyses; fractionation too large for a single bacterial reduction: repeated reduction or disproportionation. | Bawden et al. (2003), Extreme 34S depletions in ZnS at the Mike gold deposit, Carlin Tren… |
Deposits of the same type
- McDermitt United States
- California Coast Ranges (Hg district) United States
- Black Hills tin belt (South Dakota) United States
- Terlingua United States
- Keweenaw native silver district United States
- Irish Creek United States
- Cobalt district Canada
- Tungsten Queen United States
Cite this page
IsoFind Atlas (2026). Mike (Carlin Trend), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/mike-carlin-trend/ (accessed 2026-10-13).
@misc{isofind2026mikecarlintrendisotopesignatu,
title = {Mike (Carlin Trend), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/mike-carlin-trend/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13