The geochemical behavior of Mg isotopes in the Huanghe basin, China

doi:10.1016/j.chemgeo.2016.01.005

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（2010~）

	The geochemical behavior of Mg isotopes in the Huanghe basin, China
	Gao, Shuang 2,4; Fan, BaiLing 1,2; Zhao, Zhi-Qi 2; Tao, FaXiang 2; Li, XiaoDong 2; Tao, ZhengHua 2,4; He, MaoYong 3
刊名	CHEMICAL GEOLOGY
	2016-05-15
卷号	426 期号:2016 页码:19-27
关键词	Magnesium Isotope Evaporation Secondary Carbonate Formation Huanghe
DOI	10.1016/j.chemgeo.2016.01.005
文献子类	Article
英文摘要	The magnesium (Mg) isotopic composition of river waters is mainly controlled by riverine Mg sources and geochemical processes. It is meaningful to characterize Mg isotope behavior for us in understanding chemical weathering and other geochemical processes, such as secondary mineral formation linked to environmental conditions. The Huanghe basin was chosen to investigate the behavior of Mg isotopes during river erosion in temperate-semiarid and arid climate. Dissolved Mg shows a wide range of delta Mg-26 values, ranging from -1.53 parts per thousand to -0.11 parts per thousand, with most values being close to -1.09 parts per thousand. By comparison, most of the suspended loads are enriched in heavy Mg isotope, with delta Mg-26 values ranging from -2.00 parts per thousand to -0.62 parts per thousand which is controlled by mineralogy. The Mg isotopic composition in the upstream is mainly determined by the mixture between carbonate and silicate sources. When the Huanghe flows through the Loess Plateau, the dissolved Mg decreased due to the dissolution of easily dissoluble phases in loess, such as MgCl2 or MgSO4. Carbonates weathering and evaporites dissolution are the major controlling factor of the evolution of Mg isotopic composition in dissolved phase, though evaporation-related precipitation of secondary carbonates also influences the dissolved Mg isotope composition in some tributaries. The strong relationships between delta Mg-26 and pH, temperature, and delta O-18 suggest that the Mg isotope system bears significant information about the hydrogeochemical characteristics and climate conditions of the Huanghe basin. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词	MAJOR-ELEMENT CHEMISTRY ; COLLECTOR ICP-MS ; YELLOW-RIVER ; WEATHERING PROCESSES ; MAGNESIUM ISOTOPES ; LOESS PLATEAU ; CHLOROPHYLL-A ; PLANT-GROWTH ; FRACTIONATION ; CARBONATE
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000371214700002
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5793]
专题	地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
作者单位	1.Guizhou Ind Polytech Coll, Guiyang 550008, Guizhou, Peoples R China 2.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shanxi, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Gao, Shuang,Fan, BaiLing,Zhao, Zhi-Qi,et al. The geochemical behavior of Mg isotopes in the Huanghe basin, China[J]. CHEMICAL GEOLOGY,2016,426(2016):19-27.
APA	Gao, Shuang.,Fan, BaiLing.,Zhao, Zhi-Qi.,Tao, FaXiang.,Li, XiaoDong.,...&He, MaoYong.(2016).The geochemical behavior of Mg isotopes in the Huanghe basin, China.CHEMICAL GEOLOGY,426(2016),19-27.
MLA	Gao, Shuang,et al."The geochemical behavior of Mg isotopes in the Huanghe basin, China".CHEMICAL GEOLOGY 426.2016(2016):19-27.