Geological Environment and Engineering
Abbas Fallah; Soroush Modabberi; Alireza Sayyareh; amir ali Tabakh shabani
Abstract
For study the effects of traffic and urban pollution on heavy metals concentration, 40 soil samples were collected in green areas of Karaj city with different uses and 5 samples as geochemical background were collected from unpolluted areas and margins of the city. The samples after preparation were ...
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For study the effects of traffic and urban pollution on heavy metals concentration, 40 soil samples were collected in green areas of Karaj city with different uses and 5 samples as geochemical background were collected from unpolluted areas and margins of the city. The samples after preparation were analyzed by ICP-OES method. Statistical data were analyzed by SPSS (version 21) software. Relation of elements and pollution indexes determined for noticeable elements in karaj city. The Statistical analysis indicate that the distribution of metal such as: Cd,Cr,Cu,Ni and Zn in soil of Karaj city are similar to each other and often in the central part of Karaj city( Jahanshaher garden , Family park) Compared to other regions is more. Heavy metals in farmland soil are lower than other lands (garden, park). These findings are matching with the results reported by other researchers (from other regions of world). As, S and Zn have different distribution than other listed heavy metals. The Mean value of Zn, P, Ni, Cu, Cr, Co and Cd in the central part of Karaj city is more than other regions. PI value in the Karaj city soil for various heavy metals are respectively as: As>S>P>Zn>Pb>Cu>Ni, Cr>Cd The heavy metals pollution index for Karaj is 1.75, which is one of the moderate pollution soils.
A. Fallah; B. Hamdi; H. Mosaddegh
Abstract
The studied section (Kiyasar)is situated in Central Alborz,75 Km. southeast of Sari. The thickness of Carboniferous sequences (Mobarak Formation) is 385 meter and consists of thin-bedded limestone at the base and various thickness of limestone (mostly with medium thickness) with intercalations of shales ...
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The studied section (Kiyasar)is situated in Central Alborz,75 Km. southeast of Sari. The thickness of Carboniferous sequences (Mobarak Formation) is 385 meter and consists of thin-bedded limestone at the base and various thickness of limestone (mostly with medium thickness) with intercalations of shales at the top. Because of lithological similarity and the lack of index microfossils in the uppermost of Devonian and lowermost of Carboniferous, deposits, determination of this boundary was impossible in the field and the approximate boundary has been identified after study of lab by conodont elements. Apparently, this boundary is conformable and continual that the rocks at the bottom of its attributed to Khoshyeilagh Formation. This boundary is located in the interval of samples 4.1(late Devonian) and 4.3(lower Carboniferous) which the distance between them is 4m.(thin to medium-bedded limestones).The limit of boundary is distinct with extinction of Genera and Species for example Icriodus costatus, Pelekysgnathus sp. and Polygnathus semicostatus in the late of Devonian(sample4.1)and appearance of species for example Polygnathus spicatus, Spa. crassidentathus, Po. thomasi and Cly. gilwernensis in early Carboniferous (sample4.3). in summery, limestone rocks in alternation with shale of upper Famenian is attributed to lower-middle costatus zone form lower part of Carboniferous rocks in the region. The top of Mobarak Formation is overlaid by alternations of sandstone, shales and limestone (in the middle part), belong of Dorud Formation (lower Permian) with a disconformity. Carboniferous conodonts (20 Genus, 36 Species, 7 Subspecies are reported from Mobarak Fm.,Kiyasar region, for the first time as well as the distinguished following 7 conodont zones: 1) sulcata zone 2) duplicata zone 3) sandbergi-L. crenulata zone 4) typicus zone 5) anchoralis-latus zone 6) texanus- A. scalenus zone 7) Gn. bilineatus zone. According to conodont data Carboniferous sequences in Kiyasar section were deposited from lower Tournaisian to upper Visean time interval.