CanTung (E zone)
Tungsten, Northwest Territories (Canadian Cordillera, margin of the Selwyn basin), Canada
SkarnsW (Cu)
- Type
- Scheelite skarn
One of the richest scheelite skarns in the world: replacement of the Lower Cambrian Ore limestone at the contact of a Late Cretaceous peraluminous biotite monzogranite stock (91.6 Ma, K-Ar). Garnet-pyroxene, pyroxene-pyrrhotite, amphibole-pyrrhotite and biotite-pyrrhotite facies formed at about 450 to 500 °C. Mostly magmatic fluids (over 75 % fluid in equilibrium with the intrusion), limited and constant meteoric water input. Latitude from the article (61° 57' 30" N), longitude of the Tungsten settlement.
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 10.9 ± 0.2 ‰ | 10.5 / 11.1 ‰ | 5 | Mine stock monzogranite (whole rock) Mean and standard deviation recalculated from 5 samples, Table 1. High values, like the other Selwyn belt plutons (initial 87Sr/86Sr above 0.722): melting or assimilation of old crust. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| 12.3 ± 0.2 ‰ | 12 / 12.6 ‰ | 7 | quartz of the monzogranite and aplite dikes Mean and standard deviation recalculated from 7 samples, Table 1. Quartz-biotite temperatures of 440 to 520 °C; calculated fluid at 550 °C from 9.4 to 10.0 ‰. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| 13.2 ± 0.3 ‰ | 12.9 / 13.9 ‰ | 8 | skarn quartz (pyroxene and biotite facies) Mean and standard deviation recalculated from 8 samples, Table 1. Quartz-pyroxene and quartz-biotite temperatures of 460 to 525 °C. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| 8.3 ± 0.3 ‰ | 7.8 / 8.8 ‰ | 12 | pyroxene of anhydrous skarns (garnet-pyroxene and pyroxene-pyrrhotite) Mean and standard deviation recalculated from 12 samples, Table 1. Calculated fluid at 475 °C from 8.9 to 9.8 ‰. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| 7.8 ± 0.3 ‰ | 7.3 / 8 ‰ | 5 | biotite of biotite-pyrrhotite skarns Mean and standard deviation recalculated from 5 samples, Table 1. Calculated fluid at 475 °C from 9.7 to 10.4 ‰. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| 8.1 ± 0.4 ‰ | 7.8 / 8.5 ‰ | 3 | skarn amphibole Mean and standard deviation recalculated from 3 samples, Table 1. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| 13 ± 0.9 ‰ | 11.7 / 14.2 ‰ | 8 | skarn calcite Mean and standard deviation recalculated from 8 samples, Table 1. Calcite-pyroxene temperatures of 270 to 400 °C: calcite formed on cooling from the same fluid as the silicates. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| 20.1 ± 0.3 ‰ | 19.7 / 20.5 ‰ | 5 | distal host marble calcite Mean and standard deviation recalculated from 5 samples, Table 2. Ore limestone marble more than 4 m from skarn, undepleted. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| 16.6 ± 0.8 ‰ | 15.2 / 17.6 ‰ | 6 | marble calcite near the skarn contact Mean and standard deviation recalculated from 6 samples, Table 2. Ore limestone marble less than 4 m from skarn (3 cm to 3 m): depletion at the contact. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
δD in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −100 ± 13 ‰ | −122 / −87 ‰ | 7 | biotite of the monzogranite and aplites Mean and standard deviation recalculated from 7 samples, Table 1. Calculated water at 550 °C from -79 to -44 ‰. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| −117 ± 1 ‰ | −118 / −115 ‰ | 5 | biotite of biotite-pyrrhotite skarns Mean and standard deviation recalculated from 5 samples, Table 1. Calculated water at 475 °C from -77 to -73 ‰. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| −108 ± 4 ‰ | −114 / −105 ‰ | 4 | skarn amphibole Mean and standard deviation recalculated from 4 samples, Table 1. Calculated water at 475 °C from -78 to -54 ‰. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| −92 ± 3 ‰ | −94 / −90 ‰ | 2 | fluid inclusion water in skarns (crushing) Mean and standard deviation recalculated from 2 samples, Table 1. Slightly lighter than the water calculated from the hydrous minerals. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
δ13C in ‰ (per mil) Values of the same system
Standard : V-PDB
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −6.3 ± 0.7 ‰ | −7.3 / −5.6 ‰ | 8 | skarn calcite Mean and standard deviation recalculated from 8 samples, Table 1. The abstract gives a mean of -6.2 ‰. Depletion too strong for simple decarbonation of the marble. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| 0.4 ± 1 ‰ | −0.5 / 1.7 ‰ | 5 | distal host marble calcite Mean and standard deviation recalculated from 5 samples, Table 2. Ore limestone marble more than 4 m from skarn, undepleted. Typical values of Cambrian carbonates. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
| −1.3 ± 0.8 ‰ | −2.6 / −0.6 ‰ | 6 | marble calcite near the skarn contact Mean and standard deviation recalculated from 6 samples, Table 2. Ore limestone marble less than 4 m from skarn (3 cm to 3 m): depletion at the contact. | Bowman et al. (1985), The CanTung E zone scheelite skarn orebody, Tungsten, Northwest Ter… |
Deposits of the same type
- Granite Creek (Osgood Mountains) United States
- Buck Creek United States
- Antamina Peru
- Cobriza Peru
- Azegour Morocco
- Los Santos Spain
- Morille Spain
- Scalittas Italy
Cite this page
IsoFind Atlas (2026). CanTung (E zone), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/cantung-zone-e/ (accessed 2026-10-13).
@misc{isofind2026cantungezoneisotopesignatures,
title = {CanTung (E zone), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/cantung-zone-e/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13