当前位置: X-MOL 学术Aquat. Geochem. › 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.)
Geochemistry of Chilean Rivers Within the Central Zone: Distinguishing the Impact of Mining, Lithology and Physical Weathering
Aquatic Geochemistry ( IF 1.6 ) Pub Date : 2019-03-20 , DOI: 10.1007/s10498-019-09350-1
J. Viers , S. Carretier , Y. Auda , O. S. Pokrovsky , P. Seyler , F. Chabaux , V. Regard , V. Tolorza , G. Herail

Several rivers of Chile from the latitude 30°–38° have been sampled during a stable anticyclonic period (October 2008). Firstly, our aim was to evaluate the dissolved chemical composition (major and trace elements) of poorly known central Chilean rivers. Secondly, we used a co-inertia analysis (see Dolédec and Chessel in Freshw Biol 31:277–294, 1994) to explore the possible relationships between the concentrations of elements and the environmental parameters [surface of the basin (km2)/mining activity (%)/average height (m)/watershed mean slope (%)/% of the surface covered by vegetation, sedimentary rocks, volcano-sedimentary rocks, volcanic rocks, granitoid rocks/erosion rate (mm/year)]. Globally, the major elements concentration could be explained by a strong control of mixed silicate and carbonate and evaporate lithology. The statistical treatment reveals that the highest metal and metalloids loads of Tinguiririca, Cachapoal, Aconcagua, Choapa, Illapel and Limari could be explained by the contribution of the mining activities in the uppermost part of these watersheds and/or by the higher geochemical background. Indeed, it remains difficult to decipher between a real mining impact and a higher geochemical background. Even if these rivers could be impacted by AMD process, the size of these watersheds is capable of diluting AMD waters by the alkaline character of tributaries that induce acid neutralization and decrease the level of metals and metalloids.

中文翻译:

智利中部地区河流的地球化学:区分采矿,岩性和自然风化的影响

在稳定的反气旋时期(2008年10月),对智利30°–38°纬度的几条河流进行了采样。首先,我们的目标是评估鲜为人知的智利中部河流的溶解化学成分(主要和微量元素)。其次,我们使用了协惯性分析(参见Freshw Biol 31:277-294,1994中的Dolédec和Chessel)来探索元素浓度与环境参数之间的可能关系[盆地表面(km 2)/采矿活动(%)/平均高度(m)/分水岭平均坡度(%)/植被,沉积岩,火山沉积岩,火山岩,花岗岩类岩石/侵蚀速率覆盖的地表的百分比/侵蚀速率(mm /年) ]。在全球范围内,主要元素的浓度可以通过对硅酸盐和碳酸盐混合以及蒸发岩性的强烈控制来解释。统计处理表明,廷吉里里卡(Tinguiririca),卡恰波(Cachapoal),阿空加瓜(Aconcagua),乔帕(Choapa),伊拉珀尔(Illapel)和利马里(Limari)的最高金属和准金属负载可以用这些流域最上部的采矿活动贡献和/或较高的地球化学背景来解释。确实,要在真实的采矿影响和较高的地球化学背景之间做出解释仍然很困难。即使这些河流可能会受到AMD流程的影响,
更新日期:2019-03-20
down
wechat
bug