当前位置: X-MOL 学术J. Arid Environ. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The hydrogeochemistry of shallow groundwater from Lut Desert, Iran: The hottest place on Earth
Journal of Arid Environments ( IF 2.7 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.jaridenv.2020.104143
W. Berry Lyons , Susan A. Welch , Christopher B. Gardner , Arash Sharifi , Amir AghaKouchak , Marjan Mashkour , Morteza Djamali , Zeinab Matinzadeh , Sara Palacio , Hossein Akhani

Abstract This paper presents the first shallow groundwater geochemical data from the Lut Desert (Dasht-e-Lut), one of the hottest places on the planet. The waters are Na–Cl brines that have undergone extensive evaporation, but they are unlike seawater derived brines in that the K+ is low and the Ca2+ > Mg2+ and HCO3− > SO42−. In addition to evapo-concentration, the most saline samples indicate that the dissolution of previously deposited salt also acts as a major control on the geochemistry of these waters. High concentrations of gypsum in surface soils along with the water geochemistry indicate the dissolution, precipitation, and reprecipitation of evaporite salts are very important to the overall chemistry of the near surface environment. As demonstrated by the high H4SiO4 concentrations, the weathering of aluminosilicate minerals also contributes to the solutes present. Fixed nitrogen (NO3− + NO2−) concentrations suggest little to no denitrification is occurring in these waters. The processes controlling the geochemistry of the Lut waters are similar to those in other hyperarid regions of the Earth.

中文翻译:

伊朗卢特沙漠浅层地下水的水文地球化学:地球上最热的地方

摘要 本文介绍了地球上最热的地方之一卢特沙漠 (Dasht-e-Lut) 的第一个浅层地下水地球化学数据。这些水是经过大量蒸发的 Na-Cl 盐水,但它们与海水衍生的盐水不同,因为 K+ 低且 Ca2+ > Mg2+ 和 HCO3− > SO42−。除了蒸发浓度外,大多数含盐样品表明先前沉积的盐分的溶解也是这些水域地球化学的主要控制因素。表层土壤中高浓度的石膏以及水地球化学表明蒸发盐的溶解、沉淀和再沉淀对近地表环境的整体化学非常重要。正如高 H4SiO4 浓度所证明的那样,铝硅酸盐矿物的风化也会导致溶质的存在。固定氮 (NO3− + NO2−) 浓度表明这些水中几乎没有发生反硝化作用。控制卢特水域地球化学的过程与地球其他超干旱地区的过程相似。
更新日期:2020-07-01
down
wechat
bug