Haynesville Shale produced water
Northwest Louisiana and East Texas (mainly Red River Parish), United States
OtherLi (gaz)
- Type
- Lithium-bearing formation water of a Jurassic gas shale
Produced water of the Haynesville Shale, with 16 to 125 mg/L lithium (71.7 mg/L on average) for a salinity of 55 to 206 g/L. Lithium is autochthonous, in equilibrium with the illitic clays of the shale, and follows a diagenetic pathway distinct from that of the underlying Smackover Formation. Low water production makes it a secondary lithium target. Indicative coordinates.
δ7Li in ‰ (per mil) Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 3.27 ‰ | 2.61 / 4.26 ‰ | 7 | produced water Published mean and range for 7 samples; δ7Li decreases as lithium content and depth increase. | Nicot et al. (2026), Dissolved lithium content and aqueous geochemistry of the Haynesvill… |
| −4.03 ‰ | −4.88 / −3.74 ‰ | 5 | shale whole rock (drill cuttings, Webster Parish) Published mean and range for 5 samples (67.6 ppm Li weighted mean), among the lightest shales known. The discussion uses -4.20 ‰ for the rock in the water-rock offset calculation. | Nicot et al. (2026), Dissolved lithium content and aqueous geochemistry of the Haynesvill… |
87Sr/86Sr isotope ratio, no unit Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.7083 | 0.70797 / 0.7085 | 4 | produced water Published mean and range (n = 4 in the results, n = 5 in the abstract). Above Jurassic seawater (0.7070): input of radiogenic 87Sr from silicates in a closed system. | Nicot et al. (2026), Dissolved lithium content and aqueous geochemistry of the Haynesvill… |
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 2 / 6 ‰ | produced water Published range, excluding a few outliers; formation waters little affected by hydraulic fracturing. | Nicot et al. (2026), Dissolved lithium content and aqueous geochemistry of the Haynesvill… |
δD in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −28 / −15 ‰ | produced water Published range, excluding a few outliers; formation waters little affected by hydraulic fracturing. | Nicot et al. (2026), Dissolved lithium content and aqueous geochemistry of the Haynesvill… |
Deposits of the same type
- Smackover Formation brines (East Texas) United States
- Webster-Addie (Democrat) United States
- Ahles mine United States
- Inshow prospect United States
- Stinson mine United States
- Davis mine United States
- Shaw mine United States
- Howell Farm mine United States
Cite this page
IsoFind Atlas (2026). Haynesville Shale produced water, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/eaux-de-production-du-haynesville-shale/ (accessed 2026-10-13).
@misc{isofind2026haynesvilleshaleproducedwater,
title = {Haynesville Shale produced water, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/eaux-de-production-du-haynesville-shale/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13