Darco lignite seam (Texas)
Texas, Gulf Province, United States
Othercharbon (Hg)
- Type
- Coal deposit (lignite, Paleocene-Eocene)
Lignite seam of Paleocene-Eocene age, calorific content of 10,444 Btu; sample PSOC 412 of the DOE Coal Sample Bank (Pennsylvania State University), homogenised and packed under argon; mercury with a mean δ202Hg of -1.68 ‰ and Δ201Hg of -0.11 ‰ (Biswas et al., 2008). Table 1 states 9 analyses, Table SI-S1 details 8. Coordinates not given.
δ202Hg in ‰ (per mil) Values of the same system
Standard : NIST SRM 3133
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −1.68 ± 0.09 ‰ | −1.74 / −1.58 ‰ | 3 | coal (lignite) Mean and standard deviation recalculated from 3 subsamples, the standard deviation reflects deposit heterogeneity; subsamples combusted separately: -1.73 ± 0.04 ‰ (2SD 3 analyses); -1.58 ± 0.16 ‰ (2SD 2 analyses); -1.74 ± 0.16 ‰ (2SD 3 analyses); 8 analyses in total; Table 1 states 9 analyses, Table SI-S1 details 8. | Biswas et al. (2008), Natural mercury isotope variation in coal deposits and organic soil… |
Δ201Hg in ‰ (per mil) Values of the same system
Standard : NIST SRM 3133
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.11 ± 0.04 ‰ | −0.15 / −0.07 ‰ | 3 | coal (lignite) Mean and standard deviation recalculated from 3 subsamples, the standard deviation reflects deposit heterogeneity; subsamples combusted separately: -0.12 ± 0.03 ‰ (2SD 3 analyses); -0.15 ± 0.04 ‰ (2SD 2 analyses); -0.07 ± 0.00 ‰ (2SD 3 analyses); 8 analyses in total; Table 1 states 9 analyses, Table SI-S1 details 8. | Biswas et al. (2008), Natural mercury isotope variation in coal deposits and organic soil… |
Δ199Hg in ‰ (per mil) Values of the same system
Standard : NIST SRM 3133
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.1 ± 0.05 ‰ | 1 | coal (lignite) Single subsample; uncertainty = 2SD of 3 replicate analyses; Table 1 states 9 analyses, Table SI-S1 details 8. Δ199Hg measured on 1 of the 3 subsamples (protocol without mass 199 for the others). | Biswas et al. (2008), Natural mercury isotope variation in coal deposits and organic soil… |
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Cite this page
IsoFind Atlas (2026). Darco lignite seam (Texas), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/lignite-de-darco-texas/ (accessed 2026-10-15).
@misc{isofind2026darcoligniteseamtexasisotopes,
title = {Darco lignite seam (Texas), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/lignite-de-darco-texas/},
note = {Accessed 2026-10-15}
}Updated : 2026-10-15