Original Research Paper
Study of Hypogen Alteration and Copper Mineralization in Sonajil Area (East of Herris, East Azarbaidjan)

Gh. Hosseinzadeh; A.A. Calagari; M. Moayyed; B. Hadj-Alilu; M. Moazzen

Volume 19, Issue 74 , February 2010, Pages 3-12


  The Sonajil area is located in ~17 km east of Heris, East-Azarbaidjan. The major lithological units in the area include bodies of volcanic and volcanoclastic rocks (lower to middle Eocene), Sonajil porphyry stock (upper Eocene-lower Oligocene), Incheh granitoid stock (diorite, syeno-diorite, gabbro) ...  Read More

Original Research Paper
2-D Non-Linear Inverse Modeling of Moghan Area Using Levenberg-Marquardt's Method

A. Nejati Kalate; V. Ebrahimzadeh Ardestani; E. Shahin; S. H. Motavalli Anbaran; Sh. Ghomi; E. Javan

Volume 19, Issue 74 , February 2010, Pages 13-20


  Determination of the geometry of bedrock, by nonlinear inverse modeling of gravity data, is the aim of this paper. In this method, reliable geological structures can be obtained by minimum geology priori information. The usual practice of inverting gravity anomalies of two-dimensional bodies replaced ...  Read More

Original Research Paper
Petrology of Eocene Volcanic Rocks in the East of Sanandaj

H. Azizi; A. Akbarpour

Volume 19, Issue 74 , February 2010, Pages 21-26


  Volcanic rocks with mainly andesite composition and lenzoid form outcropped in the Eocene sedimentary host rocks in the east of Sanandaj. Field studies confirm that they are intercalation with the sedimentary host rocks. In thin section, those have porphyritic, glomoroporphyric microlithic and microlithic ...  Read More

Original Research Paper
Prioritization of Landslide Effective Factors and it´s Hazard Mapping using Information Value and AHP Models (Case Study: A Part of Haraz Watershed)

M. Mohammady; H.R. Morady; S. Feiz nia; H.R. Pourghasemi

Volume 19, Issue 74 , February 2010, Pages 27-32


  Destruction and inordinate use of resources causes instability of natural slopes. Policymakers pay high attention to slopes instability investigation in order to supply zoning map to identify susceptible areas and stable location for the development of new settlements in the future. Iran especially in ...  Read More

Original Research Paper
The Application of Fractures in Structural Interpretation of an Anticline, a Case Study: Chenareh Anticline, SW Iran

H. Hajialibeigi; S. A. Alavi; J. Eftekharnezhad; M. Mokhtari; M. H. Adabi

Volume 19, Issue 74 , February 2010, Pages 33-44


  The Chenareh Anticline is located between Lurestan Zone (in north) and Dezful Embayment (in south) in the Zagros Folded-Thrust Belt. This anticline is documented and interpreted to constrain the kinematic evolution of a fold. The development of fractures is confined to the Asmari Formation. In the study ...  Read More

Original Research Paper
Moho Depth Variations and vp/vs Ratio in Northwest of Zagros (Kermanshah Region) using Teleseismic Receiver Functions

N. Afsari; F. Sodoudi; M. R. Gheitanchi; A. Kaviani

Volume 19, Issue 74 , February 2010, Pages 45-50


  Characterization of the detailed structure of the crust and upper mantel is an important continuing goal of geophysical studies. Teleseismic body waveforms have been used to infer crust and upper mantel structure. In this study we use teleseismic receiver function method to determine the crustal thickness ...  Read More

Original Research Paper
Application of Structural Attributes in Petroleum Exploration and Development of an Interference Belt

A. Arzani; S.A. Alavi; M. Pooladzadeh; A.R. Golalzadeh; Z. Mehdipoor

Volume 19, Issue 74 , February 2010, Pages 51-56


  The area that will be discussed in this study is located between Zagros and Arabian structural zones in Iran in which full fold 3D seismic data has been acquired and interpreted using sophisticated techniques. This paper covers the role of structural sensitive seismic attributes including first and Second ...  Read More

Original Research Paper
Sedimentological Characteristics and Origin of Urmia Lake Deposits Along the Shahid-Kalantari Highway

A. Amini; M. Shahosseini; A. Mohammadi; M. Shahrabi

Volume 19, Issue 74 , February 2010, Pages 57-68


  The hypersaline UrmiaLake is the most important intra-continental environment in Iran, with distinctive geological, environmental, and biological, characteristics. The Shahid-Kalantari Highway (under construction) between Urmia and Tabriz cities passes through this lake. Some 14 km dyke is constructed ...  Read More

Original Research Paper
Study of Environmental Geology Characteristics and Their Effects on Landslides around Latian Dam

M. Fatemi Aghda; M. Rahbar; M. Mojezi; G. R. Asadollahfardi

Volume 19, Issue 74 , February 2010, Pages 69-76


  Every year, all over the world, landslides cause considerable damage to life and property. In order to prevent the danger and destruction brought about by landslides, it is important to identify the reasons for the occurrence of this phenomenon. This can only be achieved by conducting a thorough investigation ...  Read More

Original Research Paper
Geometry and Kinematic Analysis of Young Normal Faults in Southeast Tabriz

M. Mohajjel; A. Cholgoly

Volume 19, Issue 74 , February 2010, Pages 77-84


  Abundant normal faults were locally developed in Pliocene-Quaternary detritus and pyroclastic sediments of Sahand volcano in southeast Tabriz. Well exposed normal faults are synthetic and antithetic, horst and graben and half graben structure systems, drag folds and roll-over anticlines were produced ...  Read More

Original Research Paper
The Study of Chondrichtyan Micro remains in upper Famennian Geirud Formation, Central Alborz

M. mohamadi; M. Yazdi

Volume 19, Issue 74 , February 2010, Pages 85-90


  There are many precious microremains of chondrichtyans (cartilage fishes) in calcareous beds of Geirud Formation. These micro remains consist of teeth, branchial denticles and sales species and genus of the family and subfamily: Phoebodontidae, Protacrodontoidea, HybodontoideaandCtenacanthoidea. Geirud ...  Read More

Original Research Paper
A Geochemical and Geostatistical Approach to the Origin of the Sarfaryab Bauxite Deposits, Kohgiloyeh-va-Boyrahmad Province, SW Iran

F. Ehya; M. Lotfi

Volume 19, Issue 74 , February 2010, Pages 91-98


  The Sarfaryab bauxite deposits occur in karstic depressions at the top of the limestones of the Cenomanian to Lower Turonian Sarvak Formation, which are overlain by the limestones of the Santonian Ilam Formation. In order to determine the possible source rocks of the Sarfaryab bauxite deposits, a few ...  Read More

Original Research Paper
The Geometric, Kinematics and Deformation Stage Analysis of Metamorphic Rocks around Mashhad

M. Koohpeyma; M.R. Sheykholeslami; M.R. Ghasemi

Volume 19, Issue 74 , February 2010, Pages 99-106


  The metamorphic rocks around Mashhad city were suffered by several stages of metamorphism and deformation. Special mineral and structural elements were formed in these stages. Metamorphic grade in the pellitic rocks changes from green schist to amphibole facies. Foliations generally are steep toward ...  Read More

Original Research Paper
Introduction of Stratiform-Stratabound Tungsten (Copper) Mineral Occurrences in West of Azna, Lorestan Province

M. Abdi; Majid Ghaderi; N. Rashidnejad-Omran; E. Rastad

Volume 19, Issue 74 , February 2010, Pages 107-120


  Azna tungsten (copper) ore occurrence is located 2 km west of Azna, in Lorestan province. The region is placed in Sanandaj-Sirjan structural zone of Iran, at the complex deformation sub-zone. In this area, tungsten-copper mineralization occurs as stratiform-stratabound in mylonitic meta-rhyolite and ...  Read More

Original Research Paper
Brachiopods and Conodonts of Mobarak Formation (Early Carboniferous) in Kalariz Section, Northern Damghan

H. Gholamalian; M. R. Kebriaei zadeh; M. Ghorbani; S.M. Hosseini-Nezhad

Volume 19, Issue 74 , February 2010, Pages 121-130


  Investigation on brachiopods and conodonts of Mobarak Formation in Kalariz section confirms the age of Early Tournaisian to Middle Viséan. Some species as Bispathodus aculeatus aculeatus, Bi. stabilis, Spinocarinifera nigra and Shumardella sp.in the lowest part of section show the Early Tournaisisan ...  Read More

Original Research Paper
Crustal Structure Beneath Northwest Iran Using Teleseismic Converted Waves

F. Taghizadeh-Farahmand; F. Sodoudi; M. R. Gheitanchi; A. Kaviani

Volume 19, Issue 74 , February 2010, Pages 131-136


  We compute p receiver functions (RF) to investigate the crustal thickness and Vp/Vs ratio beneath the northwest of Iran and map out the lateral variation of Moho depth under this region. We selected data from teleseismic events (Mb≥5.5, 30˚>r  > 95˚) recorded since 2000 to present at ...  Read More

Original Research Paper
Investigation of the Influence of Abrasivity on Drillability of Rocks

M. Ataei; S. H. Hoseinie

Volume 19, Issue 74 , February 2010, Pages 137-142


  Abrasivity, as one of the most important parameters has great influence on drilling rate. Up to now, four known methods such as "Rock Abrasiveness Index (RAI)", "Cerchar Abrasiveness Index (CAI)", "Schimazek's wear factor (F-abrasivity)" and "Bit Wear Index (BWI)" have been developed for evaluating of ...  Read More

Original Research Paper
Introduction of the new (COPROD) Drilling Method and its' Comparison with other Conventional Production Drilling in Surface Mines, with the Investigation of its Applicability in Iran Mines.

M. G. Ayat; A. Mozafari

Volume 19, Issue 74 , February 2010, Pages 143-148


  Drilling is considered to be an inseparable part of the mine extraction operations, and so far a more appropriate method has not been substituted for these operations. There are different drilling methods which can be used in surface mining such as Rotary, Top hammer, Down the hole, and Coprod. The new ...  Read More

Original Research Paper
Estimating Slip Rates of Faults around Bam and their Application in Evaluation of Earthquake Hazard

M. Talebian; S. H. Tabatabaei; M. Fattahi; M. Ghorashi; A. Beitollahi; A. Ghalandarzadeh; M.A. Riahi

Volume 19, Issue 74 , February 2010, Pages 149-156


  The Iranian plateau lies between the Arabian and Eurasian plates and accommodates approximately 22 mm/yr of N-S shortening.  About 9 mm/y of this shortening is taken up by folding and thrusting in the Zagros while the remaining 13 mm/yr is taken up in the Alborz and Kopeh-Dagh. The Central Iran ...  Read More

Original Research Paper
Foraminiferal Biostratigraphy of the Gurpi and Ilam Formations in East of Kangan Port and Ivan well in Persian Gulf

J. Daneshian; D. Baghbani; Kh. Khosrow- Tehrani; L. Fazli

Volume 19, Issue 74 , February 2010, Pages 157-162


  In this study, foraminifera of the Ilam and Gurpi Formations, from Kuh-e- Assaluyeh section in east Kangan port in Boushehr province and Ivan well in Persian Gulf are investigated. Ilam Formation in Kuh-e-Assaluyeh section with 30 meter thickness and Ivan well with 68 meter thickness composed of limestone ...  Read More

Original Research Paper
Experimental and Analytical Study on the Effects of Reinforcement Elements in the Improvement Soil Geotechnical Properties

H. Ghiassian; S. Ghareh; H. Salehzadeh; R. Rasooli; I. Rahmani

Volume 19, Issue 74 , February 2010, Pages 163-168


  People have paid attention to the use of supportive elements in retrofitting and soil improvement since a long time ego. Nowadays, the capability of reinforcement soil applications has been showed in different civil engineering projects. In order to increase of bearing soil capacity and reduce the settlement ...  Read More

Original Research Paper
Depositional History of Jahrum Formation based on Distribution of Benthic Foraminifera and Strontium Isotope Stratigraphy on the Bushehr area

S. A. Moallemi; M. H. Adabi; A. Sadeghi

Volume 19, Issue 74 , February 2010, Pages 169-176


  In order to determine the depositional environment and age of the carbonaceous Jahrum Formation, benthic foraminiferal assemblage of upper Eocene in the Jahrum Formation carbonates, located in GisakanMountain, 10 km east of the Borazjan city and adjacent fields, were studied. Based on the foraminiferal ...  Read More

Original Research Paper
Bidhand Strike-Slip Fault System (South Qom)

R. Nadri; M. mohajjel; A. Bahroudi

Volume 19, Issue 74 , February 2010, Pages 177-184


  The NNW-SSE striking Bidhand strike-slip fault system cut and displaced the Cenozoic volcanic and sedimentary rocks of the Urumieh-Dokhtar magmatic arc in south Qom. Structural evidences show that at least 16 km horizontal displacement in the Eocene volcanics has been caused due to dextral strike-slip ...  Read More