The significance of mid-latitude rivers for weathering rates and chemical fluxes: Evidence from northern Xinjiang rivers

doi:10.1016/j.jhydrol.2013.01.016

	The significance of mid-latitude rivers for weathering rates and chemical fluxes: Evidence from northern Xinjiang rivers
	Zhu, Bingqi 1; Yu, Jingjie 1; Qin, Xiaoguang 2; Rioual, Patrick 2; Liu, Ziting 2; Zhang, YiChi 1; Jiang, Fengqing 3; Mu, Yan 2; Li, Hongwei 2; Ren, Xiaozong 2
刊名	JOURNAL OF HYDROLOGY
	2013-04-12
卷号	486 页码:151-174
关键词	Sedimentary platform Fluvial geochemistry Lithological weathering Drought index Dissolved solid flux Northern Xinjiang rivers
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2013.01.016
文献子类	Article
英文摘要	Rivers draining the sedimentary platform of northern Xinjiang (the center of Asian continent) are characterized by low discharge under a temperate and arid climate. The influence of rock mineralogy, climate, relief and human activity on natural water composition and export as a result of weathering is a major scientific concern both at the local and the global scale. While comprehensive work on the controlling mechanism of chemical weathering has been less carried out in the sedimentary platform of northern Xinjiang. Thus, the effects of climate and rock weathering on the inorganic hydrogeochemical processes are not well quantified at this climatic extreme. To remedy this lack a comprehensive survey has been carried out of the geochemistry of the large, pristine rivers in northern Xinjiang, the Erlqis, Yili, Wulungu, Jingou and numerous lesser streams which has not experienced the pervasive effects of glaciation and subsequent anthropogenic impacts. The scale of the terrain sampled, in terms of area, is comparable to that of the Huanghe and includes a diverse range of geologic and climatic environments. In this paper the chemical fluxes from the stable sedimentary basin of the northern Xinjiang platform will be presented and compared to published results from analogous terrains in the monsoon basins of China and world. Overall, the fluvial geochemistry of northern Xinjiang in westerly climate is similar to that of the Chinese rivers (Huanghe and Yangtze) in the East-Asian monsoon Climate, both in property-property relationships and concentration magnitudes. The range in the chemical signatures of the various tributaries is large; this reflects that lithology exerts the dominant influence in determining the weathering yield from the sedimentary terrains rather than the weathering environment. The effect of different rock weathering ranges from rivers dominated by aluminosilicate weathering, mainly of granites, sandstones and shales, to those bearing the signatures of dissolution of carbonates and evaporites and of continental playa deposits. Carbonates are the general predominant lithology undergoing dissolution particularly within the lesser arid areas. The pCO(2) in the study rivers is out of equilibrium with respect to atmospheric pCO(2), about up to similar to 20 times supersaturated relative to the atmosphere but not to such an extent as the Amazon in the floodplain. A roughly positive relationship is observed between solute concentrations and the drought index (DI) for natural waters in the region, indicating a coupled mountain-basin climate has a direct effect. The relative contributions of end-member solute sources to the total dissolved cations from each watershed have been quantitatively estimated using dissolved load balance models, showing the results as evaporite dissolution > carbonate weathering > silicate weathering > atmospheric input for the whole catchment. The areal total dissolved fluxes range from 0.05 to 2.53 x 10(6) mol/km(2)/yr, 0.02-2.09 x 10(6) mol/km(2)/yr and 0.01-1.04 x 10(6) molt km(2)/yr in the Yili, Zhungarer and Erlqis, respectively, comparable to those of Chinese and Siberia rivers draining sedimentary platforms, even though they are in drastically different climatic regimes. In general, the fluxes from rivers in sedimentary basins are comparable to those from orogenic zones, but are much higher than in the shield regions. The CO2 consumption by aluminosilicate weathering (0.
WOS关键词	MAJOR ION CHEMISTRY ; ASIAN OROGENIC BELT ; ATMOSPHERIC CARBON-DIOXIDE ; WORLD WATER CHEMISTRY ; LARGE CHINESE RIVERS ; NW CHINA ; FLUVIAL GEOCHEMISTRY ; CO2 CONSUMPTION ; EASTERN SIBERIA ; TECTONIC EVOLUTION
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000317537400012
资助机构	National Basic Research Program of China (973 Program)(2009CB421305) ; National Basic Research Program of China (973 Program)(2009CB421305) ; National Natural Science Foundation of China(91025023 ; National Natural Science Foundation of China(91025023 ; Key Consultation Project of Chinese Engineering Academy "Strategic study of the water resource in the sustainable development of Xinjiang" ; Key Consultation Project of Chinese Engineering Academy "Strategic study of the water resource in the sustainable development of Xinjiang" ; 40901059) ; 40901059) ; National Basic Research Program of China (973 Program)(2009CB421305) ; National Basic Research Program of China (973 Program)(2009CB421305) ; National Natural Science Foundation of China(91025023 ; National Natural Science Foundation of China(91025023 ; Key Consultation Project of Chinese Engineering Academy "Strategic study of the water resource in the sustainable development of Xinjiang" ; Key Consultation Project of Chinese Engineering Academy "Strategic study of the water resource in the sustainable development of Xinjiang" ; 40901059) ; 40901059) ; National Basic Research Program of China (973 Program)(2009CB421305) ; National Basic Research Program of China (973 Program)(2009CB421305) ; National Natural Science Foundation of China(91025023 ; National Natural Science Foundation of China(91025023 ; Key Consultation Project of Chinese Engineering Academy "Strategic study of the water resource in the sustainable development of Xinjiang" ; Key Consultation Project of Chinese Engineering Academy "Strategic study of the water resource in the sustainable development of Xinjiang" ; 40901059) ; 40901059) ; National Basic Research Program of China (973 Program)(2009CB421305) ; National Basic Research Program of China (973 Program)(2009CB421305) ; National Natural Science Foundation of China(91025023 ; National Natural Science Foundation of China(91025023 ; Key Consultation Project of Chinese Engineering Academy "Strategic study of the water resource in the sustainable development of Xinjiang" ; Key Consultation Project of Chinese Engineering Academy "Strategic study of the water resource in the sustainable development of Xinjiang" ; 40901059) ; 40901059)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/87592]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhu, Bingqi
作者单位	1.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China 4.Minist Educ, Key Lab Oasis Ecol, Urumqi 830046, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Bingqi,Yu, Jingjie,Qin, Xiaoguang,et al. The significance of mid-latitude rivers for weathering rates and chemical fluxes: Evidence from northern Xinjiang rivers[J]. JOURNAL OF HYDROLOGY,2013,486:151-174.
APA	Zhu, Bingqi.,Yu, Jingjie.,Qin, Xiaoguang.,Rioual, Patrick.,Liu, Ziting.,...&Xiong, Heigang.(2013).The significance of mid-latitude rivers for weathering rates and chemical fluxes: Evidence from northern Xinjiang rivers.JOURNAL OF HYDROLOGY,486,151-174.
MLA	Zhu, Bingqi,et al."The significance of mid-latitude rivers for weathering rates and chemical fluxes: Evidence from northern Xinjiang rivers".JOURNAL OF HYDROLOGY 486(2013):151-174.