Long Tom (Port Arthur, Thunder Bay)

Ontario, Thunder Bay district, Canada

Other hydrothermalAg

Type: Mesothermal silver veins

Deposit represented by collection native silver in Mathur et al. (2018) (mines: Long Tom mine, Port Arthur). Coordinates not published.

δ109Ag in ‰ (per mil) Values of the same system

Standard : NIST SRM 978a

Value	Range	n	Mineral or matrix	Source
−0.014 ‰		1	hypogene native silver Single analysis (CM197). Samples: CM197: Long Tom mine, Port Arthur (Mesothermal). Hypogene values centred on 0, supergene ones more scattered (-0.86 to +2.14 ‰) according to the authors.	Mathur et al. (2018), Fractionation of silver isotopes in native silver explained by redo…

Deposits of the same type

Pezinok Slovakia
Allchar North Macedonia
Mount Cer Serbia
Sardinia (argentiferous galenas) Italy
Almadén Spain
Wanshan China
Xunyang China
Suii Japan

Cite this page

IsoFind Atlas (2026). Long Tom (Port Arthur, Thunder Bay), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/long-tom-port-arthur-thunder-bay/ (accessed 2026-10-21).

@misc{isofind2026longtomportarthurthunderbayis,
  title = {Long Tom (Port Arthur, Thunder Bay), isotope signatures},
  author = {{IsoFind Atlas}},
  year = {2026},
  url = {https://www.isofind.tech/isotopes/en/deposits/long-tom-port-arthur-thunder-bay/},
  note = {Accessed 2026-10-21}
}

Updated : 2026-10-21