Characteristics of carbonate, evaporite and silicate weathering in Huanghe River basin: A comparison among the upstream, midstream and downstream

	Characteristics of carbonate, evaporite and silicate weathering in Huanghe River basin: A comparison among the upstream, midstream and downstream
	Bai-Ling Fan; Zhi-Qi Zhao; Fa-Xiang Tao; Bao-Jian Liu; Zheng-Hua Tao; Shuang Gao; Li-Hua Zhang
	2014
发表期刊	Journal of Asian Earth Sciences
卷号	96 期号:1 页码:17-26
摘要	To systematically study chemical weathering in the entire Huanghe River basin, we divided the basin into three parts with significant differences in geology and climate. We collected 38 water samples from the main channel and its main tributaries, spread between the upstream (above Lanzhou), midstream (from Lanzhou to Huayuankou) and downstream (from Huayuankou up to river mouth) segments of the river. The concentrations of major elements and H, O isotopic compositions were obtained from the samples, and the total dissolved solids (TDS) and, CO2 consumption budget were calculated from the aggregated data of each of the three segments. The results demonstrate that: the TDS are mainly derived from carbonate weathering in upper Huanghe River; evaporite dissolution is predominately occurred in the midstream; and there is almost no additional contribution from rock weathering in the downstream. An increasing trend of CO2 consumption rate by silicate weathering is observed, from 0.14 x 10(5) mol/km(2)/yr in the upstream to 5.62 x 10(5) mol/km(2)/yr in the downstream, and the budget of CO2 consumption by silicate weathering is estimated to be 26.2 x 10(9) mol/yr. In contrast, the CO2 consumption rate by carbonate weathering decreases from 3.04 x 10(5) mol/km(2)/yr in the upstream to near zero in the downstream, and the budget of CO2 consumption is estimated to be 100.5 x 10(9) mol/yr. As a whole, in the entire Huanghe River basin, the CO2 consumption budget and TDS yield are estimated to be 126.7 x 10(9) mol/yr, and 27.5 x 10(6) t/yr, respectively. These results indicate that evaporite dissolution in the midstream is responsible for the high ms in the Huanghe River basin, while carbonate weathering in the upstream plays the most significant role in CO2 consumption.
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/6013
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Bai-Ling Fan,Zhi-Qi Zhao,Fa-Xiang Tao,et al. Characteristics of carbonate, evaporite and silicate weathering in Huanghe River basin: A comparison among the upstream, midstream and downstream[J]. Journal of Asian Earth Sciences,2014,96(1):17-26.
APA	Bai-Ling Fan.,Zhi-Qi Zhao.,Fa-Xiang Tao.,Bao-Jian Liu.,Zheng-Hua Tao.,...&Li-Hua Zhang.(2014).Characteristics of carbonate, evaporite and silicate weathering in Huanghe River basin: A comparison among the upstream, midstream and downstream.Journal of Asian Earth Sciences,96(1),17-26.
MLA	Bai-Ling Fan,et al."Characteristics of carbonate, evaporite and silicate weathering in Huanghe River basin: A comparison among the upstream, midstream and downstream".Journal of Asian Earth Sciences 96.1(2014):17-26.

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