Arid
DOI10.1016/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
ISSN0883-2927
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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