Honda Bay coastal marine sediments (Palawan)
Palawan, Puerto Princesa (east coast, Sulu Sea), Philippines
Sediments
- Type
- Sediment
Bay receiving mercury-laden particles eroded from the mine abandoned in 1976, notably by the Tagburos River; 27 surface sediments taken with a grab sampler (very fine sand to mud), 5 of them analysed for isotopes (0.57 to 11.7 mg/kg Hg). Hg(II) dominant in thermal desorption (above 200 °C), minor Hg(I), no Hg(0); isotope signature similar to that of the mine ore and soils: rapid supply of soil particles by floods according to the authors. Indicative coordinates (centre of the bay).
δ202Hg in ‰ (per mil) Values of the same system
Standard : NIST SRM 3133
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −1.08 ± 0.4 ‰ | −1.61 / −0.65 ‰ | 5 | surface marine sediment, < 63 µm (SED 7, 6, 28, 29 and 27) Mean and standard deviation recalculated from 5 analyses, total Hg 0.57 to 11.7 mg/kg; same field as the mine ore and soils. | Samaniego et al. (2026), Mercury speciation and stable isotope signatures in marine sedim… |
Δ199Hg in ‰ (per mil) Values of the same system
Standard : NIST SRM 3133
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.08 ± 0.06 ‰ | 0 / 0.15 ‰ | 5 | surface marine sediment, < 63 µm (SED 7, 6, 28, 29 and 27) Mean and standard deviation recalculated from 5 analyses, mass-independent anomaly. | Samaniego et al. (2026), Mercury speciation and stable isotope signatures in marine sedim… |
Deposits of the same type
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- Bayi Glacier cryoconite China
- Yuzhufeng Glacier cryoconite China
- Qiyi Glacier cryoconite China
Cite this page
IsoFind Atlas (2026). Honda Bay coastal marine sediments (Palawan), isotope signatures. https://www.isofind.tech/isotopes/en/sites/sediments-marins-cotiers-de-la-baie-de-honda-palawan/ (accessed 2026-10-14).
@misc{isofind2026hondabaycoastalmarinesediment,
title = {Honda Bay coastal marine sediments (Palawan), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/sediments-marins-cotiers-de-la-baie-de-honda-palawan/},
note = {Accessed 2026-10-14}
}Updated : 2026-10-14