sulfatesourcesconstrainedbysulfurandoxygenisotopiccompositionsintheupperreachesofthexijiangriverchina

	sulfatesourcesconstrainedbysulfurandoxygenisotopiccompositionsintheupperreachesofthexijiangriverchina
	Liu Jing 3; Li Siliang 4; Zhong Jun 3; Zhu Xuetao 3; Guo Qingjun 1; Lang Yunchao 4; Han Xiaokun 2
刊名	actageochimica
	2017
卷号	000 期号:004 页码:611
ISSN号	2096-0956
英文摘要	While it is critical to accurately understand the sources and transformation of sulfate based on time-series analysis, there are limited studies on temporal variation of sulfate in rivers and on rock weathering by sulfuric acids.We conducted a monthly sampling campaign in the Beipan, Nanpan, and Hongshui Rivers over the course of one hydrological year. This study examined seasonal variations in riverine sulfate impacted by the monsoon climate in the upper reaches of the Xijiang River basin. In general, the SO42- contents in these rivers dropped from relatively high levels to low values during the high-flow season, in response to increasing discharge. The sulfate was generally enriched in heavy isotopes during the low-flow season compared to the high-flow season. The calculated results indicate that the riverine sulfate was mainly derived from sulfide oxidation, but that evaporite dissolution could be an important source during the low-flow season, based on isotopic evidence. Mine drainage is likely an important source of sulfate to these rivers during the high-flow season due to contributions from fast surface flow, which responds to frequent heavy rain in monsoonal climate regions. Arelatively high proportion of HCO3- was found to be derived from rock weathering by sulfuric acid during the high-flow season when compared to that observed during the low-flow season. The results suggest that approximately one quarter of the HCO3- in the Hongshui River originated from carbonate weathering by sulfuric acid derived from the oxidation of sulfide. Such information on the specific dual isotopic characteristics of riverine sulfate throughout a hydrological year can provide unique evidence for understanding the temporal variability of sulfate concentrations and weathering processes in rivers.
语种	英语
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/121364]
专题	中国科学院地理科学与资源研究所
作者单位	1.中国科学院地理科学与资源研究所 2.中国科学院大学 3.中国科学院地球化学研究所 4.天津大学
推荐引用方式 GB/T 7714	Liu Jing,Li Siliang,Zhong Jun,et al. sulfatesourcesconstrainedbysulfurandoxygenisotopiccompositionsintheupperreachesofthexijiangriverchina[J]. actageochimica,2017,000(004):611.
APA	Liu Jing.,Li Siliang.,Zhong Jun.,Zhu Xuetao.,Guo Qingjun.,...&Han Xiaokun.(2017).sulfatesourcesconstrainedbysulfurandoxygenisotopiccompositionsintheupperreachesofthexijiangriverchina.actageochimica,000(004),611.
MLA	Liu Jing,et al."sulfatesourcesconstrainedbysulfurandoxygenisotopiccompositionsintheupperreachesofthexijiangriverchina".actageochimica 000.004(2017):611.