Inshow prospect
New Jersey Highlands, United States
OtherFe
- Type
- Skarn-hosted magnetite in marbles
Small magnetite deposit in Mesoproterozoic marbles of the New Jersey Highlands, metamorphosed in Grenvillian times. The authors see Fe oxides and hydroxides brought by a back-arc submarine hydrothermal system (1.3 to 1.25 Ga), the same as for the zinc at Franklin and Sterling Hill. Coordinates from the publication.
δ13C in ‰ (per mil) Values of the same system
Standard : V-PDB
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.85 ± 0.79 ‰ | −2.02 / 0.1 ‰ | 7 | calcite of the ore-hosting marble Mean and standard deviation recalculated from 7 samples, Table 3. | Peck et al. (2009), Stable isotope and petrologic evidence for the origin of regional mar… |
| −1.7 ± 0.3 ‰ | −1.92 / −1.27 ‰ | 4 | calcite of the magnetite skarn Mean and standard deviation recalculated from 4 samples, Table 3. Gap of about 1.4 ‰ (δ18O) between marble and skarn core: little metamorphic fluid flow. | Peck et al. (2009), Stable isotope and petrologic evidence for the origin of regional mar… |
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.39 ± 0.25 ‰ | 15.14 / 15.71 ‰ | 7 | calcite of the ore-hosting marble Mean and standard deviation recalculated from 7 samples, Table 3. | Peck et al. (2009), Stable isotope and petrologic evidence for the origin of regional mar… |
| 14.24 ± 0.66 ‰ | 13.73 / 15.19 ‰ | 4 | calcite of the magnetite skarn Mean and standard deviation recalculated from 4 samples, Table 3. Gap of about 1.4 ‰ (δ18O) between marble and skarn core: little metamorphic fluid flow. | Peck et al. (2009), Stable isotope and petrologic evidence for the origin of regional mar… |
Deposits of the same type
- Stinson mine United States
- Davis mine United States
- Shaw mine United States
- Howell Farm mine United States
- Ahles mine United States
- Sulphur Hill mine United States
- Tar Hill mine United States
- Roseville mine United States
Cite this page
IsoFind Atlas (2026). Inshow prospect, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/prospect-inshow/ (accessed 2026-10-13).
@misc{isofind2026inshowprospectisotopesignatur,
title = {Inshow prospect, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/prospect-inshow/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13