جستجوی مقالات مرتبط با کلیدواژه "robat karim" در نشریات گروه "زمین شناسی"

Robat Karim, is located on southwest of the Tehran province. Most villages in the Robat Karim use underground water resources for potable use. During the period 1393-1392 from 10 deep wells were sampled for drinking water of village and after performing physical and chemical tests, the results of the quality of each variable were determined. Calcium, magnesium, chloride, sulfate, nitrate, hardness, bicarbonate, fluoride, conductivity and total dissolved solids of the tested variables and then used kriging method has the potential to provide maps and software Arc GIS10.2 the pollution was zoning. The results of 30 samples from 10 villages reflect the fact that the quality of groundwater in rural parts of East and Southeast of Ali Abad shows mg / l 64nitrates, in Shahrestanak with mg / l 667sulfate and Hakimabad with the electrical conductivity of 3100 μmho / cm and total dissolved solids mg / l 1918 exceeded the permitted level and is generally lower than other areas.
The causes of pollution in southern and eastern regions can be geological, slope, existing residential and industrial areas, and not respecting the wells Quality Policy.also northern and central parts of the region are in suitable quality level and these areas are appropriate for new wells .

Robat Karim manganese deposit is located in 7 km northwest of Robat Karim (southwest of Teharan), within northeastern margin of Orumiyeh-dokhtar volcanic belt. Based on regional geology, the studied area is situated in the northern Saveh Eocene volcanic assemblage, composed of rhyolite, trachyte, andesite and basalt. Manganese mineralization is occurred as veins, in faults, joints and fractures that crosscut the volcanic rocks. According to mineralogical studies, the manganese ore of the studied area is composed of pyrolusite, psilomelane, ramsdelite and hollandite, as well as calcite and quartz. Intergrowths of manganese oxides and quartz (or calcite) associated with various open space filling textures support the epithermal origin of the ore forming fluids in this area. Geochemistry of major and trace elements in Robat Karim manganese ores, similarity of their chondrite normalized REE pattern with volcanic host rocks and other hydrothermal manganese deposits of the world, as well as negative Ce anomaly indicate a probable epithermal origin of the deposit. Ore forming fluids could be originated from meteoric and/or magmatic waters circulating through Eocene volcanic rocks, dissolve manganese and other metals and deposit them in fault planes and major fractures. High pressure of the ore forming fluid has caused the formation of brecciated trachyte.