Magunao karst aquifer (aquifer B, Xikuangshan)
Hunan, Lengshuijiang, Xikuangshan district, China
Groundwater
- Type
- Groundwater
Xikuangshan antimony mine: 28 waters sampled in November 2013, including 23 springs of aquifers A, B and C, one mine water and four surface waters; arsenic up to 1274 µg/L in springs and 2545 µg/L in rivers, ascribed mainly to leaching of alkaline arsenic residues from the smelter and interaction with stibnite and silicified limestones. Sulfate (δ34S from -0.7 to +4.7 ‰ except B6) comes from sulfide oxidation, mixed with mine and surface waters; no link between δ34S and arsenic (Wen et al., 2018). Labels and 87Sr/86Sr from Table 1 of the published version. Coordinates not published (map only). Upper 258 m aquifer (limestones and sandy limestones), the main drinking-water resource of Xikuangshan.
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 2 ± 1.8 ‰ | −0.7 / 4.7 ‰ | 12 | dissolved sulfate Mean and standard deviation recalculated from 12 analyses, -0.7 to +4.7 (B1 +0.7; B2 -0.5; B3 +4.0; B4 +3.0; B5 +2.3; B7 -0.7; B8 +2.1; B9 +2.1; B10 +1.0; B11 +0.7; B12 +4.7; B13 +4.4); excluding B6; slight bacterial sulfate reduction suggested by the δ34S-sulfate anticorrelation (r² = 0.54). | Wen et al. (2018), Coupled S and Sr isotope evidences for elevated arsenic concentrations… |
| −10.7 ‰ | 1 | dissolved sulfate Single analysis; sample B6; outlier with no equivalent among district sulfides, set aside by the authors; 360 mg/L sulfate, 208 µg/L As. | Wen et al. (2018), Coupled S and Sr isotope evidences for elevated arsenic concentrations… |
87Sr/86Sr isotope ratio, no unit Values of the same system
Standard : NIST SRM 987
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.71008 ± 0.00035 | 0.70938 / 0.71061 | 13 | dissolved strontium Mean and standard deviation recalculated from 13 analyses, 0.70938 to 0.71061 (B1 0.70976; B2 0.70973; B3 0.71035; B4 0.70938; B5 0.71008; B6 0.71041; B7 0.71013; B8 0.71029; B9 0.70982; B10 0.71051; B11 0.71061; B12 0.70998; B13 0.71004); more radiogenic than aquifer A despite non-silicified limestones (cryptic alteration according to the authors). | Wen et al. (2018), Coupled S and Sr isotope evidences for elevated arsenic concentrations… |
Deposits of the same type
- Vinto drinking water (DW1 to DW3) Bolivia
- Coal-mine tip, site 1 (unconfined chalk aquifer) France
- Coal-mine tip, site 2 (confined chalk aquifer) France
- Pebble deposit seeps United States
- Yarlung Tsangpo basin geothermal springs China
- Archibarca alluvial fan groundwater Argentina
- Rosario River fan hot springs Argentina
- Jiangling Basin thermal waters (JS-W1, YC-W1) China
Cite this page
IsoFind Atlas (2026). Magunao karst aquifer (aquifer B, Xikuangshan), isotope signatures. https://www.isofind.tech/isotopes/en/sites/aquifere-karstique-de-magunao-aquifere-b-xikuangshan/ (accessed 2026-10-16).
@misc{isofind2026magunaokarstaquiferaquiferbxi,
title = {Magunao karst aquifer (aquifer B, Xikuangshan), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/aquifere-karstique-de-magunao-aquifere-b-xikuangshan/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16