Number 27 Volume 8

Open Access Article

1 - Mineralogy and geochemistry of host rocks of in the Jalal Mn ore Deposit ( South of Qom)
Mansore Mahdavi محمد Yazdi M.H Emami

Jalal Manganese ore is located in the southwest of the Qom. The area is located in Uromieh-Dokhtargeological zone of Iran. The base and host rock of the area include Eocene volcanic rocks such as basalt,andesite, trachyte, rhyolite, andesite-basaltic lava and spillitic More

Jalal Manganese ore is located in the southwest of the Qom. The area is located in Uromieh-Dokhtargeological zone of Iran. The base and host rock of the area include Eocene volcanic rocks such as basalt,andesite, trachyte, rhyolite, andesite-basaltic lava and spillitic lava. The lavas are more pillow types. Theyounger andesite-basaltic dykes have been intruded to these volcano-sedimentary rocks of the area.TheMn- mineralization was hosted in the volcano-sedimentary rocks of the area. Hangingwall and footwall ofore are andesite-basaltic lava and spillitic lava. The ore mineralization was hosted as vein type withinfaults, joints and fractures. The main direction of ore mineralization is NW-SE in the several parallellayers. These layers have been known as A, B, D ore layers in the Jalal area. The surface outcrop of orelayers is about 2km and have been cut by several local faults, mainly in NW of the area. The new drillingsshow that the dip and direction of the ore layers have been changed in the dipper parts mainly to the NE.The ore minerals are mainly pyrolusite, Psilomelane, with Mn oxides and non-ore minerals are mainlycalcite and quartz. Field survey, geochemical and mineralogical studies show that the mineralization isvein epithermal type. Manuscript profile

Open Access Article

2 - Determining the sensitivity to erosion (Medan watershed)
Ghorban Vahhabzadeh پیام Ebrahimi

The uses of the sediment and erosion models are the most suitable methods to estimate the soil loss rate ina watershed. In this research 4 method of Fargas, BLM, MPSIAC, Feiznia tables and Hunt Boweninfiltrations method were used to calculate the soil loss rate in diffe More

The uses of the sediment and erosion models are the most suitable methods to estimate the soil loss rate ina watershed. In this research 4 method of Fargas, BLM, MPSIAC, Feiznia tables and Hunt Boweninfiltrations method were used to calculate the soil loss rate in different work units of Alamoot Medanwatershed in Qhazvin province. The areas which were effective in soil loss were determined with thesemethods and then results were compared to each other. Results showed that the models Fargas, MPSIACand BLM with grades of 40.75, 50.81 and 43.73 have close mean to each other and mean erodibility.Feiznia table evaluated the region more erodible and infiltration was determined slowly by Hunt Bowen.Moreover, based on the hydrological response the sub watershed 4 with an area of 2292.308 hectare and 1with an area of 1389.06 hectare had most effects when flood happened. For operational programs tocontrol erosion and sediment production in region it is recommended that in first priority must be subwatershed 4 and 1. If the purpose is runoff penetration and preventing flood sub watershed 4 with an areaof 2734.827 hectare and 1 with an area of 1544.648 hectare and 2 with an area of 680.386 must berespectively first priority Manuscript profile

Open Access Article

3 - Environmental impact of agricultural land contamination of organochlorine and organophosphorus pesticides, Isfahan metropolis
سامان KHabazi فرید Moor بهنام Keshavarzi مریم Kermani

Use of pesticides is a common practice in agriculture nowadays and indeed most pesticides are overused. Twomajor groups of pesticides are organochlorin and organophosphorus. In this study 13 surface soil and 10 surfaceand groundwater samples were collected in winter 139 More

Use of pesticides is a common practice in agriculture nowadays and indeed most pesticides are overused. Twomajor groups of pesticides are organochlorin and organophosphorus. In this study 13 surface soil and 10 surfaceand groundwater samples were collected in winter 1390 and spring 1391 within a radius of 60 Kms from thecenter of Isfahan metropolis. The measured concentrations of 8 organochlorin and 9 organophosphorus pesticidein the collected water samples indicate that all fall below the maximum recommended level and pose no threatto the environment. However, results from soil samples revealed that among the organochlorides theconcentration of DDT metabolites i.e combined DDE and DDD concentration is rather high. The concentrationof organophosphorus pesticide in soil depends upon several factors including, degradation half life and theamount of used pesticide. The concentration of residual organophosphor pesticide in soil is above recommendedsafe values. Manuscript profile

Open Access Article

4 - An investigation on the relation between dolomitization and microfacieses of carbonate rocks in Lower Cretaceous in Gushfil (South west of Isfahan)
Tahereh Salimi علی خان Nasre Esfahani عبدالحسین Kagazian واچیک Hairapian

Dolomite units of study based on Petrography contains five groups very fine to finely crystalline anhedraldolomites, finely to medium crystalline euhedral dolomites, medium crystalline subhedral dolomites, medium tocoarsely crystalline anhedral dolomites (saddle) and co More

Dolomite units of study based on Petrography contains five groups very fine to finely crystalline anhedraldolomites, finely to medium crystalline euhedral dolomites, medium crystalline subhedral dolomites, medium tocoarsely crystalline anhedral dolomites (saddle) and coarsely crystalline planar-C dolomites (cement dolomite).Studing on pervasive dolomitization express that dolomite sediment has been not happened in one stage but thisphenomena has been happened in long time. MicroFacies of study based on white card contains: Ooidpackstone/grainstone, milliolida mudstone/ wackstone, mudstone, mulluska mudstone/wackstone, orbitolinamudstone/wackstone, pelloid packstone/grainstone, ooid wackstone. These observations can explain thatdiagenesis in section of study has been act vastly. Manuscript profile

Open Access Article

5 - Petrography and Geochemistry of the Basic Volcanic rocks of Kuh-e-Gharineh, north-east Ghorveh (west of Iran)
S.J SHikh Zakariyaei افشین Ashja Ardalan سحر Tarabi

The volcano of Kuh-e-Gharineh is one of the volcanic areas of Ghorveh-Tekab in Sanandaj - Sirjan belt andlocated in Ghezelche Kand area. guartz xenocryst, plagioclase and granitoid xenolithe are seem in thecomposition of these rocks.Phenocrysts, xenocrysts, xenolithe ar More

The volcano of Kuh-e-Gharineh is one of the volcanic areas of Ghorveh-Tekab in Sanandaj - Sirjan belt andlocated in Ghezelche Kand area. guartz xenocryst, plagioclase and granitoid xenolithe are seem in thecomposition of these rocks.Phenocrysts, xenocrysts, xenolithe are seem in a backgrand of microcrystalline withporphyric texture and microlytic matrix to glassy vesicular. On the basis of conducted petrographic researches,all rocks are consisted of basalt, olivine basalt and andisi basalt compounds. According to geochemical studies,the studied alkaline basalt rocks (ultrapotassic) are categorized as intraplate alkaline shoshonitic rocks. Thenegative and positive anomalies of normalized patterns of incompatible rare elements show the contaminationwith the crust and the phenomenon of assimilation. The analysis of the portion of the LILE)Litofil Ion LargElements(, HFSE)High Field Small Elements(, and REE )Rare Earth Elements( elements shows a sign of anenriched source similar to OIB)Ocean Island Basalt( oceanic basalt and also considers the role of upper /lowercrusts to be more effective than that of the subcontinental lithosphere in magmas‌contamination. Manuscript profile

Open Access Article

6 - Determination of Reservoir character of kangan & dalan formation in south pars gas field using wireline logs
میترا Nozari بهرام Movahed S.H Vaziri

The south pars gas field is on of the southwestern fields of iran in zagros sedimentary basing andconsists of two kangan and dalan reservoirs . the Kangan and Dalan formations belong to Dehram Groupand are the most important gas reservoirs in Persian Gulf area . Petroph More

The south pars gas field is on of the southwestern fields of iran in zagros sedimentary basing andconsists of two kangan and dalan reservoirs . the Kangan and Dalan formations belong to Dehram Groupand are the most important gas reservoirs in Persian Gulf area . Petrophysical characteristics in the studiedwell were evaluated by the data of the well logs and Probabilistic method was used for petrophysical byGeolog 6.6 software . for an accurate evaluations , the necessary corrections were applied on logs byconsidering the places of wash out , environment effects , gas and shale effects . After that , the lithology ofthe Kangan and Dalan formations were determined by using of cross plot of neutron – density.Analysis of wire line data shows that the formation is basically limeston and in some part it is dolomite .on the based of Lithology , shale volume , presence of evaporate sediments and porosity , the Kanganformation has been zoned to and , and the Dalan formation has been zoned to and . The resultsshow that the zone of the Kangan formation and the zone of the Dalan formation have on apporiatereservoir in terms of gas saturation level, porosity and lithology as results porosity (PHIE) and watersaturation (SWE) were obtained 9/45% , 9/7% for kangan and 8/65% , 8/2% for Dalan formation inaverage , respectively . Manuscript profile

Open Access Article

7 - Evaluation of activity periods of Giv fault-segments using study of co-seismic travertines
معصومه Zamani M.M KHatib GH.R Mirab-SHabestari محسن Aliabadi

The Giv strike-slip fault as one of active faults is located at 30 km in the south of Birjand. The appearance ofthis fault is discontinuous as it is composed of different pieces. Quaternary depositions rupture and occurrenceof destroyer earthquakes in 1324 and 1369 year More

The Giv strike-slip fault as one of active faults is located at 30 km in the south of Birjand. The appearance ofthis fault is discontinuous as it is composed of different pieces. Quaternary depositions rupture and occurrenceof destroyer earthquakes in 1324 and 1369 years are signs of fault activity. One of unique features on Giv faultis producting travertine deposits after each activity. With respect to each stage of Giv fault activity isassociated with one stage of travertinization in the past, therefore study travertinization stages show that thenumber of segments activity is different, hence survey the number of travertinization stages for each faultsegment is recognized a paleoseismology relatively. Field studies show at least three stages of travertinizationalong some of segments. Accordingly the Giv fault is divided into four main segments so that Garijgansegment-fault has recognized as the oldest and the most activity and Giv segment-fault has recognized as theyoungest and the lowest activity. Manuscript profile

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