Number 11 Volume 4

Open Access Article

1 - Evaluation of environmental effects of heavy metals in the Siah Jangal-sarkahnow region
غزل Haj-Najafi M.R Jafari محمود Almasian Mahdi Hoshyar

Environmental problems of heavy metals are especially important. For sustainable development of mining industry environmental aspects need to be identifed it. The purpose of thisresearch is study of gold genesis and accompanying elements in Siah Jangal region in Sistan More

Environmental problems of heavy metals are especially important. For sustainable development of mining industry environmental aspects need to be identifed it. The purpose of thisresearch is study of gold genesis and accompanying elements in Siah Jangal region in Sistan andBaluchestan province with attention to contaminating elements of the environment. The studyarea near the sarkahnow village located in north volcano Taftan in South East of Iran in 120 kmsouth East of Zahedan in Sistan and Baluchistan province In geological prospect, the exploratory region of Siah Jangal – Sarkahnow is located in flishi zone of east of Iran and the adjacentof one of the active tectonomagmatic centers of Iran. This area includes flish sediments andophiolitic rocks with Upper Cretaceous age and Paleocene، which between Afghan (Helmand)and Lut block is located. In order To evaluate the contamination of heavy metals in the regionas a systematic sampling was performed. After preparation of the samples were analysed. Theresults were compared with World Health Organization standards and were determined that theelements Cd, Pb, Ni, As contamination in the area and fortunately Hg element does not create alot of contamination. With using this results were depicted the zonation maps of contaminationof elements including As, Pb, Ni, Hg, Cd in this region and was delineate that these elementscaused to contamination in this region. The maps showed that the mentioned elements are causing contamination of the area Manuscript profile

Open Access Article

2 - Geological,mineralogical,petrogeraphy and alternation investigation at Kashmar Chalpou-Kalate Chubak antimony deposite
fatemeh KHakrah Mohammad Lotfi S.J Moghadasi

The mine area is located in 65km north of Kashmar(Khorasan-e-Razavi province-East Iran)and it forms a part of northeast of Central Iran zone. This area consists of Paleogene terrigenoussediments containing of shale, marl, sandstone and conglomerate with interlayers of p More

The mine area is located in 65km north of Kashmar(Khorasan-e-Razavi province-East Iran)and it forms a part of northeast of Central Iran zone. This area consists of Paleogene terrigenoussediments containing of shale, marl, sandstone and conglomerate with interlayers of pyroclasticrocks that age of sediments are belonged to Eocene. The faults with East-West trending(parallelwith Doruneh main fault) inﬂuenced the region and the formation of this deposit. The mineralogy of deposit is simple and consists of quartz, calcite, stibnite, pyrite, gold, realgar and orpiment. The main type alternations are arjillic, sericitic, pyritization, silicifcation and carbonatization. Field observations, petrography and paragenetic sequences indicate that mineralizationis happened in epithermal vein system. Manuscript profile

Open Access Article

3 - studies the amount of reduction in the permeability of heap leaching structures drainage , in the effect of chemical parameter
آرش Razm-khah مهران GHolinejad مهدی Amini Ahmad Hekmat-Ravesh

Heap leaching structures use for accumulate and obtaining metals from ore. These structurescompose of different parts. Among those, creating a drainage layer in the mineral materialbed is very important. because during this long period the amount, of the permeability wi More

Heap leaching structures use for accumulate and obtaining metals from ore. These structurescompose of different parts. Among those, creating a drainage layer in the mineral materialbed is very important. because during this long period the amount, of the permeability willdecrease, due to different factors. In addition to these factors, we also mention to the chemical,physical and biological factors. The author is trying to examine the effect of chemical factorson heap leaching structures drainage gravel, by simulating different parts of the leaching structures. Therefore, suitable cells are built for accumulating ore materials and drainage gravel.After flling these cells with the before said material during 6 months, acid is been irrigation onore material cells and the cell output is transferred to the input of the drainage gravel cells. Thepermanent washing of the ore material and the action and reaction, cause a chemical cloggingand also the closing of the pores of the drainage gravel. In the determined period for simulation,the permeability amount of drainage gravel will be measured and the reduction amount of thecoeffcient of the permeability by the effect of clogging will be studied permanently. Suitabledesign for gravel drainage height, needs suitable information of the amount of permeabilityreduction. Use the obtained results of the simulation, due to the prevent of creating drainagedamages Manuscript profile

Open Access Article

4 - Investigation of immediate roof’s GSI variations effects on periodic roof weighting interval of underground coal mines By Numerical method
اصغر Nourozi کاظم Ouroei مهرداد Javadi کامران Goshtasbi

Nowadays, the longwall mining method is one of the most usage methods in coal mining. Estimating of periodic roof weighting interval in longwall methods is one of the most importantparameters in safety and success of coal mines production. Because, selecting of a length More

Nowadays, the longwall mining method is one of the most usage methods in coal mining. Estimating of periodic roof weighting interval in longwall methods is one of the most importantparameters in safety and success of coal mines production. Because, selecting of a lengths lessthan real size can hazard the miners’ life by electing a weak support system and also selectingthe lengths more than real size constrain further costs to mine. In other hand, discontinuitiesof roof have negative effects to stability of immediate roof. In this research, equation betweenperiodic roof weighting interval and GSI variations is extracted by numerical modeling. Toevaluating this equation, the roof weighting interval of ten coal mines of India is considered.The results show that, the roof weighting interval of India’s coal mines and the results of thisequation are properly same together. Manuscript profile

Open Access Article

5 - Representing a modern method to tunnel stability analysis with introducing a new scheme for Ground Reaction Curve (GRC); case study: Garin dam water Diversion tunnel
S.M Hoseini کاوه Ahangari کامران Goshtasbi

The most important problem in tunneling project about design and performance is selectionsuitable pattern for drilling and support system, in order to stability of rock mass and reductionplasticity zone. Meanwhile determine the amount of tunnel wall deformation prior to More

The most important problem in tunneling project about design and performance is selectionsuitable pattern for drilling and support system, in order to stability of rock mass and reductionplasticity zone. Meanwhile determine the amount of tunnel wall deformation prior to supportinstallation is of great importance. When a tunnel is excavated, there is a certain amount ofdeformation, usually 35-45 percent of the fnal tunnel wall deformation, before the support canbe installed. Determining this deformation can be done using either a) observed feld values, orb) numerically from 3D fnite-element models or symmetrical fnite-element models, or c) byuse of empirical relationships such as those proposed by Panet or Vlachopoulos-Diederichs. Inthis paper, convergence-confnement method is applied to tracing ground characteristic curveusing numerical software models and then stress relaxation is exerted to modal that equivalentwith occurred critical convergence until prior to support installation. In this study, a new chartis introduced which unlike conventional charts, the modulus reduction ﬂow has been used inthat vertical axis. Finally the safety factor of support system has been calculated by three different methods. Manuscript profile

Open Access Article

6 - The study of geochemistry and petrogensis of the Hasansalaran granitoids (SE Saqqez)
علی Pournouroz M.H Emami S.J SHikh-Zakariaei

Hasansalaran granitoid is located in structural Sanandaj–Sirjan zone. This granitoid share towparts: a) northern part, b) southern part, northern part is composed of biotite and hornblandgranite, granodiorite and tonalite. In this Granitoid, ther are microgranular More

Hasansalaran granitoid is located in structural Sanandaj–Sirjan zone. This granitoid share towparts: a) northern part, b) southern part, northern part is composed of biotite and hornblandgranite, granodiorite and tonalite. In this Granitoid, ther are microgranular enclaves that arecomposed of quartzdiorite and tonalite and they have circular or ellipsoidal shapes. These rockshave granular, porphyritic and graphic texture and secondary textures are kataclastic and milonitic texture.Southern part composed of alkali feldspar granite, alkali syenite and quartz syenite that theyhave show granular matrix and pertite.The northern parts of Hasansalaran granitoid share all the geochemical features common toI – type granites. these granites are related with active continental margin zone. Southern partsare A – type and related with rifts. According to isotopic study Southern parts are older thanNorthern parts. Variation of major and trace elements shows magmatic differentiation, somewhat crustal contamination in northern part of studies area. Manuscript profile

Open Access Article

7 - Petrology and geochemistry of isolated diabasic dikes in North Nain Ophiolite
Mohammad Fodazi M.H Emami سلیمان Alaei-Mahabadi

Nain ophiolites,which are part of Ophiolitic suite of western margin of Central Iran micro continent, covering 500 km2 crop out along Nain-Baft fault. The age of the emplacement of theophiolitic suite is upper cretaceous and early paleocene based on microfossils found i More

Nain ophiolites,which are part of Ophiolitic suite of western margin of Central Iran micro continent, covering 500 km2 crop out along Nain-Baft fault. The age of the emplacement of theophiolitic suite is upper cretaceous and early paleocene based on microfossils found in pelagiclimestones[1]. Diabasic dikes have been divided into microgabbro-gabbros, gabbros with hydrothermal metamorphism, rodingites, and amphibolites, based on hydrothermal metamorphism,metasomatism, and tectonic events that they have gone through[2].These rocks have tholeit character in geochemical diagram(AFM), and the chondrite normalized spider diagrams shows enrichment in LREE and HREE. This enrichmentis attributed to its differentiated origin. Geochemistry of trace elements and REE of these rocksand low(La/Y)N<1.5 and (La/Sm)N<1.5 ratios are similar to those of N-Morb to T-Morb in uppercretaceous. Manuscript profile

Open Access Article

8 - Ground water drawdown and land subsidence in Garmsar – Eyvanekey regions
N. Ebadati

Garmsar and Eyvanekey plans are located south of central Alborz, between north central Iran,and to connect mountains with basins. the existence of alluvials of arise from Alborz mountion erosion created aquifers , geological investigation frm that evaporates and salt do More

Garmsar and Eyvanekey plans are located south of central Alborz, between north central Iran,and to connect mountains with basins. the existence of alluvials of arise from Alborz mountion erosion created aquifers , geological investigation frm that evaporates and salt dooms ofupper and lower red formation cause of increase salinity and thus sulfat solution in alluviu ,this subject effect in increased porosity of sediments.Measurement of piezometric wells show ground water drawdown in the last 18 years , and thissubject on the basic of procedure exploitation in the 30 years is similar.Calculations based drawdown at least 27 meters of ground water table caused about 50-60cm subsidence , and 20-30 cm. subsidence due 20 years at next.Calculation ground water depletion produce surface cracks , deep fractures and damage builings . It necessary attention to water management and geological engineering specifcationsin contracture project at future. Manuscript profile

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