Tri-State district
Southwest Missouri, northeast Oklahoma, southeast Kansas, United States
Mississippi Valley TypePb-Zn
- Type
- Mississippi Valley Type (MVT)
A district of about 3,200 km² around Joplin, Missouri. Its lead is extremely radiogenic, of J type, and was first described by Nier in 1938.
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 21.8373 / 22.1956 | sphalerite | Lead isotope trends and metal sources in MVT districts mid-continent US (2018) |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.8633 / 15.9571 | sphalerite | Lead isotope trends and metal sources in MVT districts mid-continent US (2018) |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 40.7443 / 41.2626 | sphalerite | Lead isotope trends and metal sources in MVT districts mid-continent US (2018) |
Deposits of the same type
- Northern Arkansas district United States
- Upper Mississippi Valley district United States
- Central and East Tennessee MVT United States
- Southern Appalachians MVT United States
- Cusses (Brusque) France
- Les Malines France
- Durfort France
- Saint-Félix-de-Pallières France
Cite this page
IsoFind Atlas (2026). Tri-State district, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/district-de-tri-state/ (accessed 2026-10-06).
@misc{isofind2026tristatedistrictisotopesignat,
title = {Tri-State district, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/district-de-tri-state/},
note = {Accessed 2026-10-06}
}Updated : 2026-10-06