The geochemistry of Boron-rich groundwater of the Karlovassi Basin, Samos Island, Greece
The geochemistry of Boron-rich groundwater of the Karlovassi Basin, Samos Island, Greece
复制标题
希腊萨摩斯岛卡洛瓦西盆地富硼地下水的地球化学
DOI：
10.2478/v10085-009-0017-4
复制
发表时间：
2009
影响因子：
--
通讯作者：
N. Evelpidou
中科院分区：
文献类型：
--
作者：
M. Stamatakis;E. Tziritis;N. Evelpidou
希腊Samos岛Karlovassi盆地中新世上部含有石英、榴辉石、天青石、石膏和芒硝石等陆相蒸发岩。这些蒸发岩与火山凝灰岩有关，在盐碱湖环境中成岩蚀变。本文的目的是：a)确定已知和可能埋藏的硼酸盐和其他蒸发岩对Karlovassi盆地水文地质系统的地球化学影响；B)考虑到所检测的物理化学参数浓度的空间变化，评估地表和地下蒸发岩矿床之间的相关性。野外调查、实验室测量和文献数据显示，Karlovassi盆地中部硼值升高（2136-33012⧎/L）。在同一地区，也会出现大量的锶、钠、锂和硫酸盐。这些离子来源于蒸发岩和自生矿物（如富锶斜沸石和含硼钾长石）的浸出。淡水含水层的硼值异常高，表明盆地中存在埋藏的蒸发岩，其意义未知。
The upper Miocene of Karlovassi Basin, Samos Island, Greece, contain continental evaporites such as colemanite, ulexite, celestite, gypsum and thenardite. These evaporites are related with volcanic tuffs, diagenetically altered in a saline-alkaline lake environment. The aim of the present paper is to: a) define the impact of the already known and possible buried borates and other evaporites to the geochemistry of the hydrogeological system of Karlovassi Basin, and; b) to assess the correlation between surface and underground evaporite deposits considering the spatial changes in the concentrations of the examined physicochemical parameters. Fieldwork, laboratory measurements and literature data revealed elevated boron values (2136–33012 ⧎/L) in the central part of Karlovassi Basin. In the same area, high amounts of strontium, sodium, lithium and sulfates also occur. It is proposed that these ions originate from the leaching of evaporites and authigenic minerals such as the Sr-rich clinoptilolite and the boron-bearing potassium feldspar. Boron values are abnormally high for freshwater aquifers, and are indicative of the presence of buried evaporites in the basin with unknown significance.