贵州乌江水系河水硫同位素组成特征研究

蒋颖魁; 刘丛强; 陶发祥

贵州乌江水系河水硫同位素组成特征研究

1.
济南大学城市发展学院, 山东, 济南, 250022;
2.
中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002

基金项目: 国家重点基础研究发展计划(973)资助项目(2006CB403200);中国科学院知识创新工程资助项目(KZCX3-SW-140);国家自然科学基金资助项目(40672158)

详细信息

作者简介:
蒋颖魁(1972- ),男,天津人,讲师,主要从事环境地球化学研究.E-mail:jyk1030@163.com

中图分类号: P593;X142

Sulfur isotope composition characters of Wujiang river water in Guizhou province

1.
School of City Development, Jinan University, Jinan 250022, China;
2.
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

Funds: The study is financially supported by the National Key Project for Basic Research and Development Program of China (No.2006CB403200) andthe National Natural Science Foundation of China (No.40372108)

摘要: 对乌江丰水期河水硫酸盐的硫同位素组成特征进行了研究。SO₄^2-平均浓度为0.48 mmol/L,δ³⁴S值为-11.5‰~8.3‰,干流河水δ³⁴S值为-6.7‰~-3.9‰。河水的硫同位素组成主要受岩石风化及大气降水的影响,具有明显的区域性分异特征:上游碳酸盐岩地区河水的SO₄^2-浓度高而δ³⁴S值低,SO₄^2-主要来源于煤中黄铁矿的氧化、矿床硫化物的氧化和大气降水;下游碳酸盐岩夹碎屑岩地区河水中的SO₄^2-浓度低而δ³⁴S值高,SO₄^2-主要来源于大气降水和石膏溶解,煤中黄铁矿氧化生成的硫酸盐所占比重较低。乌江河水向贵州省外输出的SO₄^2-通量为172×10¹⁰g/a,丰水期占全年SO₄^2-输出总量的72%。来自煤、硫化物、雨水和蒸发岩的硫对丰水期河水中SO₄^2-的平均贡献分别为:50%、25%、20%和5%。H₂SO₄对碳酸盐岩的侵蚀速率为35.1 t/km²/a(17.5 mm/ka),由此降低大气CO₂消耗速率3.66×10⁵mol/km²/a。
- 河水 /
- 硫同位素 /
- 输出通量 /
- 碳酸盐岩 /
- 侵蚀 /
- 乌江
Abstract: The sulfur isotopic (δ³⁴S-SO₄^2-) composition of the water in Wujiang river and its catchment area was measured during high-flow period.The average SO₄^2- concentration is 0.48 mmol/L.The river water δ³⁴S values range from -11.5‰ to 8.3‰,whereas the δ³⁴S values of mainstream show only a narrow range and exhibit negative values from -6.7‰ to -3.9‰.The isotopic composition of surface water allows distinguishing the contribution due to the weathering rock and atmospheric precipitation,and the spatial variation in δ³⁴S over the catchment area is obvious.The average SO₄^2- concentration is higher in the upper part of the river than in the lower regions,while the average δ³⁴S value is lower.The upper river shows a three end 2 member mixing between rainwater SO₄^2-,SO₄^2- from oxidation of pyrite in coal and the sulfide deposits.In the lower reaches,the samples lie mainly on the isotopic mixing trend between the evaporitic SO₄^2- and rainwater SO₄^2-,the contribution of SO₄^2- from oxidation of pyrite is less.The SO₄^2- export flux of Wujiang river is 172×10¹⁰ g/a,of which the high-flow period export flux accounts for 80%.the relative contributions from the oxidation of pyrite in coal,the oxidation of sulfides deposits,the rainwater SO₄^2- and the evaporitic SO₄^2- are 50%,25%,20% and 5%,respectively.The erosion rate of carbonate by sulfuric acid is 35.1 t/km²/a (17.5 mm/ka) and the consumption rate reducing CO₂ is 3.66×10⁵ mol/km²/a approximately.
- river water /
- sulfur isotope /
- export flux /
- carbonate /
- erosion /
- Wujiang river

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贵州乌江水系河水硫同位素组成特征研究

作者简介:
蒋颖魁(1972- ),男,天津人,讲师,主要从事环境地球化学研究.E-mail:jyk1030@163.com

Sulfur isotope composition characters of Wujiang river water in Guizhou province

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贵州乌江水系河水硫同位素组成特征研究

1. 济南大学城市发展学院, 山东, 济南, 250022;

2. 中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002

作者简介:
蒋颖魁(1972- ),男,天津人,讲师,主要从事环境地球化学研究.E-mail:jyk1030@163.com

English Abstract

Sulfur isotope composition characters of Wujiang river water in Guizhou province

1. School of City Development, Jinan University, Jinan 250022, China;

2. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

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贵州乌江水系河水硫同位素组成特征研究

作者简介: 蒋颖魁(1972- ),男,天津人,讲师,主要从事环境地球化学研究.E-mail:jyk1030@163.com

Sulfur isotope composition characters of Wujiang river water in Guizhou province

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出版历程

贵州乌江水系河水硫同位素组成特征研究

1. 济南大学城市发展学院, 山东, 济南, 250022; 2. 中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002

作者简介: 蒋颖魁(1972- ),男,天津人,讲师,主要从事环境地球化学研究.E-mail:jyk1030@163.com

English Abstract

Sulfur isotope composition characters of Wujiang river water in Guizhou province

1. School of City Development, Jinan University, Jinan 250022, China; 2. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

全文HTML

目录

作者简介:
蒋颖魁(1972- ),男,天津人,讲师,主要从事环境地球化学研究.E-mail:jyk1030@163.com

1. 济南大学城市发展学院, 山东, 济南, 250022;

2. 中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002

作者简介:
蒋颖魁(1972- ),男,天津人,讲师,主要从事环境地球化学研究.E-mail:jyk1030@163.com

1. School of City Development, Jinan University, Jinan 250022, China;

2. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China