Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.apgeochem.2017.12.016 |
Chemical balance of the Yellow River source region, the northeastern Qinghai-Tibetan Plateau: Insights about critical zone reactivity | |
Li, Siling1; Xia, Xinghui1; Zhou, Bin2; Zhang, Sibo1; Zhang, Liwei1; Mou, Xinli1,3 | |
通讯作者 | Xia, Xinghui |
来源期刊 | APPLIED GEOCHEMISTRY
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ISSN | 0883-2927 |
出版年 | 2018 |
卷号 | 90页码:1-12 |
英文摘要 | Rivers play a vital role in geochemical processes of the critical zone. As the Third Pole, the geochemical processes of the Qinghai-Tibetan Plateau are vital to global element cycles. The Yellow River source region is located in the northeastern Qinghai-Tibetan Plateau, yet there has been little research concerning water chemistry in this region. In this study, river water and rain samples were collected to analyze the stable isotopes and major ion chemistry in the Yellow River source region. The delta O-18 and delta D values ranged from -12.9% to -4.5% and from -95.7% to -36.7%, respectively. The stable isotopic values of tributaries were lower than those in the main stream, and the construction of the dam could result in the enrichment of delta O-18 and dD. The stable isotopic values showed that precipitation was the main source of river water. The total dissolved solids (TDS) in river water ranged from 214.9 to 563.2 mg/L, and calcium and bicarbonate were the dominant ions. The average contributions of atmospheric input, evaporites, silicates, and carbonates to the dissolved load of river water were 1.8%-12.5%, 12.4%-15.9%, 18.1%-18.4%, and 56.7%-64.3%. The silicate and carbonate weathering rates were 2.3-2.5 t/km(2)/yr and 17.4-19.6 t/km(2)/yr, respectively. The chemical denudation rate in the study area was about 23.0-26.8 t/km(2)/yr, comparable to the world average value. The CO2 consumption rates by silicate and carbonate weathering were 91-94 x 10(3) moL/km(2)/yr and 185-208 x 10(3) moL/km(2)/yr, respectively. The TDS flux in the study area was 6.1x10(9) kg/yr, which accounted for 38-47% of that of the Yellow River into the sea. This study showed that although as an alpine arid area, the Yellow River source region had a comparable chemical denudation rate to the world average value, and even higher CO2 consumption rates by silicate and carbonate weathering than some of the large rivers in the world. |
英文关键词 | Stable hydrogen and oxygen isotopes Water chemistry The yellow river source region Atmospheric CO2 consumption rate TDS flux Rock weathering |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000424849000001 |
WOS关键词 | MAJOR ION CHEMISTRY ; CO2 CONSUMPTION ; WEATHERING PROCESSES ; SUSPENDED-SEDIMENT ; ELEMENT CHEMISTRY ; ATMOSPHERIC CO2 ; STABLE-ISOTOPES ; HUANGHE RIVER ; DELTA-D ; WATER |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
来源机构 | 北京师范大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/207633 |
作者单位 | 1.Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China; 2.Adm Ctr Chinas Agenda 21, Beijing 100038, Peoples R China; 3.Chongqing Three Gorges Univ, Sch Environm & Chem Engn, Chongqing 404100, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Siling,Xia, Xinghui,Zhou, Bin,et al. Chemical balance of the Yellow River source region, the northeastern Qinghai-Tibetan Plateau: Insights about critical zone reactivity[J]. 北京师范大学,2018,90:1-12. |
APA | Li, Siling,Xia, Xinghui,Zhou, Bin,Zhang, Sibo,Zhang, Liwei,&Mou, Xinli.(2018).Chemical balance of the Yellow River source region, the northeastern Qinghai-Tibetan Plateau: Insights about critical zone reactivity.APPLIED GEOCHEMISTRY,90,1-12. |
MLA | Li, Siling,et al."Chemical balance of the Yellow River source region, the northeastern Qinghai-Tibetan Plateau: Insights about critical zone reactivity".APPLIED GEOCHEMISTRY 90(2018):1-12. |
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