Seasonal and Spatial Variation of Mo Isotope Compositions in Headwater Stream of Xijiang River Draining the Carbonate Terrain, Southwest China
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Sampling and Chemical Analysis
2.3. Analytical Technique for Mo Isotope Composition
3. Results
3.1. Seasonal and Spatial Variations in Mo Concentration
3.2. Mo Isotopic Composition
4. Discussion
4.1. Source of Dissolved Mo in the River Water
4.1.1. Atmospheric and Anthropogenic Inputs
4.1.2. Weathering of Rock
4.2. Mo Isotope Fractionation during Weathering and Riverine Transportation
4.3. Consequences of River in Carbonate Terrain for the Global Mo Isotope Budget
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Sample | pH a | T a | EC a | DO a | Mo a | δ98/95Mo | Na+ | K+ | Mg2+ | Ca2+ | HCO3− | Cl− | NO3− | SO42− |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | μS/cm | mg/L | nmol/L | ‰ | mmol/L b | |||||||||
Wet season | ||||||||||||||
N1 | 7.6 | 21.3 | 249 | 4.9 | 5.7 | 0.87 | 0.45 | 0.12 | 0.63 | 1.79 | 3.29 | 0.48 | 0.29 | 0.50 |
N2 | 7.8 | 22.7 | 267 | 6.9 | 8.8 | 0.77 | 0.23 | 0.11 | 0.68 | 2.09 | 3.27 | 0.44 | 0.45 | 0.50 |
N3 | 8.1 | 23.3 | 259 | 7.1 | 8.2 | 0.51 | 0.56 | 0.18 | 0.79 | 1.59 | 2.84 | 0.56 | 0.41 | 0.48 |
N4 | 7.9 | 23.9 | 225 | 6.8 | 9.7 | 0.95 | 0.26 | 0.08 | 0.58 | 1.73 | 2.95 | 0.27 | 0.56 | 0.49 |
N5 | 8.1 | 20.3 | 181 | 8.1 | 5.3 | 1.08 | 0.13 | 0.04 | 0.39 | 1.47 | 2.15 | 0.16 | 0.31 | 0.50 |
N6 | 8.1 | 27.1 | 163 | 7.4 | 9.3 | 0.95 | 0.29 | 0.06 | 0.54 | 1.04 | 1.97 | 0.17 | 0.21 | 0.50 |
N7 | 8.4 | 30.6 | 158 | 12.3 | 6.6 | 1.05 | 0.22 | 0.05 | 0.47 | 1.13 | 2.21 | 0.17 | 0.16 | 0.34 |
H1 | 8.0 | 31.9 | 193 | 8.4 | 5.7 | 0.90 | 0.34 | 0.06 | 0.46 | 1.43 | 2.74 | 0.41 | 0.06 | 0.36 |
H2 | 8.4 | 31.7 | 162 | 12.4 | 8.1 | 1.12 | 0.26 | 0.06 | 0.51 | 1.05 | 2.05 | 0.18 | 0.14 | 0.38 |
H3 | 8.3 | 33.3 | 155 | 10.0 | 7.2 | 1.05 | 0.24 | 0.05 | 0.43 | 1.03 | 1.84 | 0.14 | 0.10 | 0.40 |
H4 | 7.7 | 22.7 | 182 | 6.6 | 5.9 | 1.25 | 0.17 | 0.05 | 0.36 | 1.48 | 2.60 | 0.11 | 0.12 | 0.36 |
B1 | 8.3 | 27.0 | 206 | 9.0 | 6.3 | 0.83 | 0.23 | 0.05 | 0.46 | 1.55 | 2.33 | 0.14 | 0.28 | 0.70 |
B2 | 8.0 | 21.8 | 201 | 8.5 | 7.1 | 1.20 | 0.25 | 0.04 | 0.37 | 1.56 | 2.33 | 0.11 | 0.25 | 0.68 |
Dry season | ||||||||||||||
N1 | 8.2 | 11.4 | 602 | 9.0 | 6.6 | 1.09 | 0.92 | 0.18 | 0.67 | 1.88 | 3.36 | 0.73 | 0.52 | 0.86 |
N2 | 8.3 | 13.4 | 530 | 8.5 | 9.4 | 1.03 | 0.44 | 0.13 | 0.78 | 1.85 | 3.41 | 0.39 | 0.44 | 0.69 |
N3 | 8.3 | 13.6 | 588 | 8.8 | 6.3 | 0.97 | 0.66 | 0.16 | 0.81 | 1.23 | 3.70 | 0.56 | 0.19 | 0.63 |
N4 | 8.3 | 15.3 | 396 | 7.9 | 8.0 | 1.05 | 0.22 | 0.06 | 0.51 | 1.49 | 3.17 | 0.17 | 0.21 | 0.31 |
N5 | 8.3 | 15.4 | 401 | 7.8 | 7.2 | 0.93 | 0.21 | 0.05 | 0.48 | 1.31 | 3.15 | 0.16 | 0.20 | 0.30 |
N6 | 8.3 | 15.7 | 398 | 7.1 | 18.9 | 1.00 | 0.21 | 0.05 | 0.50 | 1.41 | 3.12 | 0.16 | 0.20 | 0.31 |
N7 | 8.1 | 17.8 | 384 | 7.9 | 9.7 | 0.96 | 0.23 | 0.05 | 0.46 | 1.51 | 2.74 | 0.13 | 0.22 | 0.44 |
H1 | 8.0 | 17.5 | 383 | 7.7 | 7.8 | 1.04 | 0.22 | 0.05 | 0.46 | 0.83 | 2.76 | 0.14 | 0.23 | 0.43 |
H2 | 8.1 | 18.0 | 381 | 8.0 | 7.9 | 0.97 | 0.23 | 0.05 | 0.47 | 1.51 | 2.73 | 0.14 | 0.21 | 0.45 |
H3 | 8.3 | 10.6 | 465 | 9.2 | 7.6 | 1.78 | 0.21 | 0.05 | 0.60 | 1.05 | 3.11 | 0.17 | 0.12 | 0.84 |
H4 | 7.8 | 19.1 | 370 | 7.7 | 6.8 | 1.03 | 0.22 | 0.05 | 0.42 | 0.80 | 2.70 | 0.12 | 0.20 | 0.42 |
B1 | 8.0 | 10.2 | 414 | 6.6 | 7.3 | 1.03 | 0.21 | 0.06 | 0.60 | 1.51 | 3.15 | 0.14 | 0.16 | 0.43 |
B2 | 8.2 | 16.2 | 409 | 9.0 | 7.3 | 1.25 | 0.32 | 0.04 | 0.45 | 0.89 | 2.56 | 0.12 | 0.18 | 0.68 |
Item | DO | FeSPM a | MnSPM a | DOC b | |
---|---|---|---|---|---|
δ98/95Mo | Pearson correlation | 0.31 | −0.69 | −0.72 | −0.66 |
significance (two-tailed) | 0.12 | 0.31 | 0.28 | 0.05 | |
N | 26 | 4 | 4 | 9 |
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Zeng, J.; Han, G.; Zhu, J.-M. Seasonal and Spatial Variation of Mo Isotope Compositions in Headwater Stream of Xijiang River Draining the Carbonate Terrain, Southwest China. Water 2019, 11, 1076. https://doi.org/10.3390/w11051076
Zeng J, Han G, Zhu J-M. Seasonal and Spatial Variation of Mo Isotope Compositions in Headwater Stream of Xijiang River Draining the Carbonate Terrain, Southwest China. Water. 2019; 11(5):1076. https://doi.org/10.3390/w11051076
Chicago/Turabian StyleZeng, Jie, Guilin Han, and Jian-Ming Zhu. 2019. "Seasonal and Spatial Variation of Mo Isotope Compositions in Headwater Stream of Xijiang River Draining the Carbonate Terrain, Southwest China" Water 11, no. 5: 1076. https://doi.org/10.3390/w11051076