Columbia (dissolved osmium)
Columbia basin, United States
Rivers and surface water
- Type
- River or surface water
River quoted by Sharma et al. (1999, Table 1) as a comparison for Himalayan rivers. USGS station at Warrendale (Oregon); basin dominated by the Columbia flood basalts (14 to 17 Ma) (Sharma and Wasserburg, 1997).
187Os/188Os isotope ratio, no unit Values of the same system
Standard : Rapport absolu, sans standard de référence
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 1.72 | 1 | river water (dissolved load) Single analysis: measured 187Os/186Os 11.8 ± 0.6, to be read as a lower limit given the low content; 14.4 after a blank correction scaled on the Mississippi. Dissolved Os 15.0 ± 0.9 fmol/kg. Value found surprising by the authors for a basin draining mostly the Tertiary Columbia basalts. With the normal 186Os/188Os ratio of Table 1 (0.11995), one would get 1.25, 1.73, 1.06 and 1.28 for the Mississippi, Columbia, Connecticut and Vistula. | Sharma & Wasserburg (1997), Osmium in the rivers, Geochimica et Cosmochimica Acta 61(24):… |
Deposits of the same type
- Flat River and streams upstream of the CanTung mine Canada
- Rio Grande (upper basin) United States
- Missouri at Columbia United States
- Pebble deposit streams United States
- Mississippi (dissolved osmium) United States
- Ottawa River at Chenaux Canada
- Connecticut (dissolved osmium) United States
- Rio Negro at Manaus Brazil
Cite this page
IsoFind Atlas (2026). Columbia (dissolved osmium), isotope signatures. https://www.isofind.tech/isotopes/en/sites/columbia-osmium-dissous/ (accessed 2026-10-20).
@misc{isofind2026columbiadissolvedosmiumisotop,
title = {Columbia (dissolved osmium), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/columbia-osmium-dissous/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20