East Pacific Rise, metalliferous sediments (cores PC85, PC87 and AII54/29)
Eastern equatorial Pacific, East Pacific Rise, Océan Pacifique (eaux internationales)
Sediments
- Type
- Sediment
Metalliferous carbonate sediments from the East Pacific Rise flank (1 to 2 cm/ka, Fe/Al up to 14); composite samples over tens to hundreds of cm (McMurtry et al., 1981). Coordinates not published (Fig. 1 only).
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 |
|---|---|---|---|---|
| 1.0219 ± 0.0108 | 1.009 / 1.0349 | 5 | metalliferous sediment (bulk) Mean and standard deviation recalculated from 5 analyses, 1.0090 to 1.0349 (PC85 1.0090; PC85 (2) 1.0133; PC87 1.0231; AII54/29 1.0349; AII54/29 (2) 1.0291). Published 187Os/186Os: PC85 8.384 ± 0.011, Os 152 ppt, 100-600 cm, 42-250 ka; PC85 (2) 8.420 ± 0.009, Os 128 ppt, 100-600 cm, 42-250 ka; PC87 8.501 ± 0.003, Os 138 ppt, 400-755 cm, 285-540 ka; AII54/29 8.599 ± 0.018, Os 130 ppt, 1-12 cm; AII54/29 (2) 8.551 ± 0.015, Os 128 ppt, 1-12 cm. 187Os/186Os 8.4 to 8.6, like recent organic-rich sediments: mostly hydrogenous Os. | Ravizza & McMurtry (1993), Osmium isotopic variations in metalliferous sediments from the… |
Deposits of the same type
- Pebble iron oxide precipitates United States
- Laohugou No. 12 Glacier cryoconite China
- Yuzhufeng Glacier cryoconite China
- Bayi Glacier cryoconite China
- Qiyi Glacier cryoconite China
- Yulong Snow Mountains glacier cryoconite China
- Hailuogou Glacier (Mount Gongga) cryoconite China
- Dangxiong Glacier cryoconite China
Cite this page
IsoFind Atlas (2026). East Pacific Rise, metalliferous sediments (cores PC85, PC87 and AII54/29), isotope signatures. https://www.isofind.tech/isotopes/en/sites/dorsale-est-pacifique-sediments-metalliferes-carottes-pc85-pc87-et-aii54-29/ (accessed 2026-10-21).
@misc{isofind2026eastpacificrisemetalliferouss,
title = {East Pacific Rise, metalliferous sediments (cores PC85, PC87 and AII54/29), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/dorsale-est-pacifique-sediments-metalliferes-carottes-pc85-pc87-et-aii54-29/},
note = {Accessed 2026-10-21}
}Updated : 2026-10-21