جستجوی مقالات مرتبط با کلیدواژه « کبودرآهنگ » در نشریات گروه « زمین شناسی »

The main purpose of this study was to determine the concentration of water quality parameters and then the distribution of fluoride ion concentration in groundwater resources of KabudarAhang city located in Hamadan province; For this purpose, after sampling from selected wells and chemical analysis of relevant data, the concentration of water quality parameters for all wet and dry seasons of 2016, 2011, 2006, and 2020 were analyzed. According to the WQI classification, most water samples in the final years are in the weak range and for the years 2006 to 2011 are in the good classification range. Over the years, the effects of fluoride on human health have been recognized. Fluoride concentration in groundwater of Hamedan suburbs (KabudarAhang) for wet and dry seasons of 2020 was investigated using GIS software and WQI statistical index. The results of this study showed that in some areas of KabudarAhang, there is a possibility of exposure to natural pollution due to increased concentration of fluoride in drinking water. In general, 18.91% of groundwater samples have higher concentrations than the maximum allowable concentration of fluoride recommended by the World Health Organization (WHO) in drinking water. According to the proposed maps, the spatial variation of the studied parameter in groundwater was determined that the highest fluoride pollution is in the ideal route, located in the northwest of the region and Nodeh located in the southwest of the plain. The lowest fluoride concentration is in the northeast of the plain. The origin of this halogen group in the plains is due to geological factors, which is due to the country being located on the third fluoride belt in the world. In general, weathering and dissolution of gypsum, volcanic rocks, and calc-alkaline rocks cause an increase in fluoride levels in the groundwater of the area.

The volcanic rocks in the north of Kaboudarahang consist of andesite-tracky andesite with the Eocene age have been exposed in the Uromieh-Dokhtar zone. These andesite are scattered as prasmatic columns. Petrographic studies show that these rocks consist of amphibole and plagioclase with porphyritic, glomoroporphyritic and microlitic tetures. Geochemical studies show that these rocks belong to the calc alkaline magmatic series. In terms of tectonic environment, they are located in the active continental margin associated with subduction zone. Trace element patern shows the enrichment of LREE to HREE. Amphibole mineral chemistry shows that they are belonging to the calcic group of magnesium hornblend and chermackit types. These amphiboles belong to active continental margin that consistent with the results of host andesite. Based on thermobarometric methods, these amphiboles are formed at a temperature of 815.5 ° C and a pressure of 6.35 kbar. The high fugacity obtained for these rocks indicates the oxidant conditions in the formation of these rocks and evidence of their formation at the boundary of convergent plates.

The parameters of the electrical conductivity, calcium, chloride, magnesium, sodium, sulfate and bicarbonate contents, TDS and SAR obtained from groundwater chemical analysis were used to evaluate the quality of under ground water resources in the Northwest plain of Kaboodarahang. The data were interpreted from 18 samples of water quality in the distribution network of the selected villages in two periods (November 2008 and August 2009) using diagrams of Scholer, Piper, Wilcox, and Durov, and map of the hydrogeochemistry were performed. These studies have shown that the majority of the water resources for agricultural activities are classified in the category C2S1 and C3S1 (Conductivity Sodium Adsorption Ratio). Also this study remarks appropriate to acceptable quality for agricultural purposes. In criteria, drinking water quality in the plain is acceptable based on hardness quantity (279-500) and the Scholer graph. Water quality for the industrial activities has corrosive characteristic in all parts of the especially in Northwest of the Kaboodarahang plain.