Carbonate sediments of the Yuhuang and Duanqiao fields
Southwest Indian Ridge, segments 27 and 29, Océan Indien (eaux internationales)
Sediments
- Type
- Sediment
Carbonate oozes (73 to 92 % CaCO3, 0.5 to 2.1 µg/g Ga) collected around the two hydrothermal fields. Less than 1 % of the Ga sits in the carbonate phase: dissolved seawater gallium taken up by Fe and Mn oxides and hydroxides, hence a δ71Ga heavier than the basalts (+1.22 ‰); the authors infer local seawater between +1.92 and +2.36 ‰ (Zhang et al., 2021). Indicative coordinates (between the two fields).
δ71Ga in ‰ (per mil) Values of the same system
Standard : NIST SRM 994
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 1.38 ± 0.07 ‰ | 1.28 / 1.47 ‰ | 8 | carbonate sediment (whole rock) Mean and standard deviation recalculated from 8 analyses, samples SD-1 to SD-8, heavier than the nearby MORB (+1.20 to +1.23 ‰). | Zhang et al. (2021), Ga isotopic fractionation in sulfides from the Yuhuang and Duanqiao … |
Deposits of the same type
- Kuoqionggangri Glacier cryoconite China
- Yulong Snow Mountains glacier cryoconite China
- Honda Bay coastal marine sediments (Palawan) Philippines
- Hailuogou Glacier (Mount Gongga) cryoconite China
- Keqikaer Glacier cryoconite China
- Yuzhufeng Glacier cryoconite China
- Dangxiong Glacier cryoconite China
- Ürümqi Glacier No. 1 cryoconite China
Cite this page
IsoFind Atlas (2026). Carbonate sediments of the Yuhuang and Duanqiao fields, isotope signatures. https://www.isofind.tech/isotopes/en/sites/sediments-carbonates-des-champs-de-yuhuang-et-duanqiao/ (accessed 2026-10-15).
@misc{isofind2026carbonatesedimentsoftheyuhuan,
title = {Carbonate sediments of the Yuhuang and Duanqiao fields, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/sediments-carbonates-des-champs-de-yuhuang-et-duanqiao/},
note = {Accessed 2026-10-15}
}Updated : 2026-10-15