Original Research Paper
2. Preparation of Red Pigment from Manganese Tailings of Venarch Mine (Qom)

Kh. Tahmasbi poor; A. Fazeli

Volume 20, Issue 77 , January 2010, Pages 3-8

http://dx.doi.org/10.22071/gsj.2010.55298

Abstract
  VENARCH Manganese Mine is located about 30 Km from south –east of Qom city Volcano– clastic rocks of middle to upper Eocene age make up major outcrops of the region. Sedimentary rocks of Oligo-Miocene age overlie previous rocks, Red earth is found with manganese in the majority of manganese ...  Read More

Original Research Paper
3. Trace Fossils of Cretaceous Flysch Sediments from Abshar-e Asyab Kharabeh, Jolfa Area, NW Iran

Nasrollah Abbassi

Volume 20, Issue 77 , January 2010, Pages 9-16

http://dx.doi.org/10.22071/gsj.2010.55299

Abstract
  Cretaceous flysch deposits of the Abshar-e Asyab Kharabeh (30 meters) in west of Siah-rud village in the Jolfa area, NW Iran, consist of conglomerate, sandstone, siltstone and mud- or marlstone layers, which mainly belong to A, B, D and E divisions of Bouma sequence. A divers trace fossils preserved ...  Read More

Original Research Paper
4. Experimental Simulation of Collision Zones and Formation of Fold-Thrust belts in Method of Analogue Modeling

S. Khederzadeh; A. Bahrodi

Volume 20, Issue 77 , January 2010, Pages 17-24

http://dx.doi.org/10.22071/gsj.2010.55301

Abstract
  Sand box models are in order to investigation of circumstance of deformation create in orogenic event. Progressive rigid indenter is as non-plastic continental crust that moves from one side to ward sand hanging wall that is indication plastic crust. The sand primery thickness and angle of rigid indenter ...  Read More

Original Research Paper
5. GIS Using X3D Technology for the Development of 3D Geological Web GIS

M. Shahbazi; A. Mansourian

Volume 20, Issue 77 , January 2010, Pages 25-30

http://dx.doi.org/10.22071/gsj.2010.55302

Abstract
  Geological data are used in a variety of applications. These data have three dimensional (3D) nature and hence 3D modeling, storage, dissemination and presentation of the data not only provide a better understanding of the current situation and the relationship between different features and data layers, ...  Read More

Original Research Paper
6. Mesorbitolinas of Dariyan Formation in Dashtak stratigraphic section,North of Shiraz

F. Safari; M. Yazdi-Moghadam; F. Sajjadi

Volume 20, Issue 77 , January 2010, Pages 31-40

http://dx.doi.org/10.22071/gsj.2010.55303

Abstract
  To recognize different species of the genus Orbitolina and determine the age of the Dariyan Formation, the upper limy part of the Dariyan Formation in Dashtak section was sampled and studied. Based on the size, shape and complexity of embryonic apparatus, five species belonging to subgenus Mesorbitolina ...  Read More

Original Research Paper
7. Separating the Sungun Copper Deposit Alteration Zones by Applying Artificial Neural Network

A. Hezarkhani; P. Tahmasbi; O. Asghari

Volume 20, Issue 77 , January 2010, Pages 41-46

http://dx.doi.org/10.22071/gsj.2010.55304

Abstract
  Separation of alteration zones is one of the important processes in evaluation and identification of mining activities that provide great help to have better view of the region and its mineralization. Most of the alteration separation is based on petrological investigations and the other methods are ...  Read More

Original Research Paper
8. Liquefaction Hazard of Tehran based on Past Studies

F. Askari; H. Garivani

Volume 20, Issue 77 , January 2010, Pages 47-56

http://dx.doi.org/10.22071/gsj.2010.55306

Abstract
  Tehran is the largest and the most populous city of  Iran that have been recently regarded from the risk management point of view because of possibility of the earthquake damages. An important destructive phenomenon that may happen in Tehran during an earthquake is liquefaction.  In the last ...  Read More

Original Research Paper
9. Cyclostratigraphy of Ab-Deraz Formation in East Kopet-Dagh Basin and Influence of Milankovitch Cycles

L. Fateh Bahari; M.H. Mahmoudi Gharaei; A. Mahboubi; R. Moussavi-Harami

Volume 20, Issue 77 , January 2010, Pages 57-62

http://dx.doi.org/10.22071/gsj.2010.55335

Abstract
  Ab-Deraz Formation (Turonian to Santonian) is a marly - Carbonates sequence consists of three marl-chalky limestones intervals. This formation widely crops out in Kopet-Dagh Basin in NE of Iran. Chalk and calcareous marl couplets show decimeter to meter scale cycles. Carbonate content of chalky beds ...  Read More

Original Research Paper
10. Introducing Rudist of Tarbur Formation, Semirum and Khorramabad Sections

I. Maghfouri Moghaddam

Volume 20, Issue 77 , January 2010, Pages 63-66

http://dx.doi.org/10.22071/gsj.2010.55336

Abstract
  Rudists of the Tarbur Formation, in 7 km southwest of Semirum and 10 km north of Khorramabad, have been studied. Paleontological studies indicate that the age of the Tarbur Formation in both sections is Masstrichtian, and has a rich macrofossil fauna of rudist. The important types of rudist include Radiolites, ...  Read More

Original Research Paper
11. Reconstruction of Masuleh Debris Flow Initiated by Heavy Rain Fall

S. Hashemi Tabatabaei; A. A. Musivand; S. M. Safavi; B. Akbari

Volume 20, Issue 77 , January 2010, Pages 67-74

http://dx.doi.org/10.22071/gsj.2010.55337

Abstract
  Landslide and flood are natural disaster which can create tremendous lose of life and properties. The combine occurrence of these events can create debris flow. Due to the repetition of debris flood in different locations of northern part of the country (Neka, 1378, Kolastan, 1380, and 1384), and tremendous ...  Read More

Original Research Paper
12. Geological Study of Offshore Mud Volcanoes in the Southeast Caspian Sea

J. Faslebahar; M. Pourkermani; S. Faslebahar

Volume 20, Issue 77 , January 2010, Pages 75-82

http://dx.doi.org/10.22071/gsj.2010.55338

Abstract
  Mud volcanoes are one of the interesting phenomenons that many researchers in oil field, plate tectonics and geotourism consider the most. In this regard there are many studies in the other countries, especially those which have this phenomenon and published many articles. This article is the output ...  Read More

Original Research Paper
13. Water-Level Fluctutions and Sequence Stratigraphy of the Ab-Talkh Formation at Type Section

E. Ghasemi-Nejad; & Z. Rezaei

Volume 20, Issue 77 , January 2010, Pages 91-98

http://dx.doi.org/10.22071/gsj.2010.55341

Abstract
  The Ab-Talkh Formation (Campanian- Maastrichtian) is one of the lithostratigraphic units of the Kopeh-Dagh sedimentary basin. So far no high resolution sequence stratigraphy has been done on this formation. In this study, we use the fossil evidences to analyse the formation in the sequence stratigraphy ...  Read More

Original Research Paper
14. Petrology and Geochemistry of Shah Ashan Dagh Mafic Rocks and A-type Granite in NE of Khoy, NW Iran

M. Advay; A. Jahangiri; M. Mojtahedi; J. Ghalamghash

Volume 20, Issue 77 , January 2010, Pages 83-90

http://dx.doi.org/10.22071/gsj.2010.55342

Abstract
  The study area as a part of Maku-Tabriz zone is located in about 20 km NE of Khoy, NW Iran. Shah Ashan Dagh granite covers about 60 km2 of the area and emplaced into Permian host rocks and covered by Oligo-Miocene sedimentary rocks (Qom Formation). The Shah Ashan Dagh intrusive rocks composed of gabbro ...  Read More

Original Research Paper
15. Active Folding Induced by Recent Movements of Dorouneh Fault System

H. R. Javadi; M. R. Ghassemi; M. Shahpasandzadeh; M. Estrabi Ashtiani

Volume 20, Issue 77 , January 2010, Pages 99-108

http://dx.doi.org/10.22071/gsj.2010.55344

Abstract
  Dorouneh Fault System (DFS) is located along northern border of Central Iran microplate. Its mechanism is left-lateral strike-slip with reverse dip-slip component. Considering curve geometry of DFS, it is divided into three major parts: eastern, middle and western. Middle part extends from Torbat-e-Heidarieh ...  Read More

Original Research Paper
16. Petrology and Sedimentary Environment of the Kahar Formation in Firouzabad and Shahindezh Areas (west and central Alborz)

F. Gharib; Y. Lasemi; M. H. Emami

Volume 20, Issue 77 , January 2010, Pages 109-114

http://dx.doi.org/10.22071/gsj.2010.55348

Abstract
  The clastic facies of Kahar Formation were identified in the studied sections of coastal, deltaic and fluvial and also carbonate facies in shallow marine environments. The vertical displacements of Kahar Formation in these study sections show an overall major transgressive upward cycle. The petrography ...  Read More

Original Research Paper
17. Evaluation of Factors Influencing Groundwater Chemical Quality Using Statistical and Hydrochemical Methods in Jiroft Plain

M. Faryabi; N. Kalantari; A. Negarestani

Volume 20, Issue 77 , January 2010, Pages 115-120

http://dx.doi.org/10.22071/gsj.2010.55355

Abstract
  The Jiroft plain is located at about 230 km from Kerman city in southeast of Iran. As groundwater is the main source for agriculture, industry and drinking in this area, thus its qualitative evaluation is very important. In this study for evaluation of groundwater chemical quality, a combination of statistical ...  Read More

Original Research Paper
18. New Results on Mineralography and Crystal Chemistry of Magnetite and Pyrite at Baba-Ali & Galali Iron Deposits, West of Hamedan, Iran

Ghodratollah Rostami Paydar; M. Lotfi; M. Ghaderi; A. Amiri; M. Vossoughi-Abedini

Volume 20, Issue 77 , January 2010, Pages 121-130

http://dx.doi.org/10.22071/gsj.2010.55356

Abstract
  Baba-Ali and Galali iron deposits in west of Hamedan are emplaced within the Songhor volcano-sedimentary sequence of Sanandaj-Sirjan geological-structural zone. Mineralography and SEM-EDAX analyses on magnetite iron ores at both deposits for better understanding of mineralogy and crystal-chemistry of ...  Read More

Original Research Paper
19. Geochemistry and Petrogenesis of Andesitic-Basaltic Series in Siah-Cheshmeh Ophiolite, NW of Khoy

M. Poormohsen; M. Rahgoshay; I. Azadi; H. Shafaii Moghadam

Volume 20, Issue 77 , January 2010, Pages 131-136

http://dx.doi.org/10.22071/gsj.2010.55358

Abstract
  The Siah-Cheshmeh ophiolites at the north-northwest part of the Khoy ophiolites show a dismembered pile of metamorphic units, mantle sequence, and basaltic-andesitic lavas associated with Late Cretaceous pelagic limestones and cherts.  The basaltic-andesitic lavas can be divided into alkaline and ...  Read More

Original Research Paper
20. Investigation of HEM Forward Modeling Accuracy on Inverse Modeling

A.R. Arab-Amiri; A. Moradzadeh; D. Rajabi; N. Fathianpour; B. Siemon

Volume 20, Issue 77 , January 2010, Pages 137-140

http://dx.doi.org/10.22071/gsj.2010.55362

Abstract
  Today Helicopter-borne electromagnetic (HEM) data survey play important role for high resolution and fast 3D mapping of resistivity structures within the vast area. The standard method of interpretation of these data is to inverse them frequently. As surveying system is not fixed during the survey, hence ...  Read More

Original Research Paper
21. Biostratigraphy of Surmaq and Julfa Formations Harzand Village Stratigraphic Section (North of Marand) Based on Foraminifera

R. Shabanian; M. Parvanehne-Nezhad Shirazi; F. Javadinia

Volume 20, Issue 77 , January 2010, Pages 141-150

http://dx.doi.org/10.22071/gsj.2010.55364

Abstract
  The detailed stratigraphical and lithological analysis of the Permian sequence in north Marand, NW of Iran at Harzand village has been studied . At this locating the Permian sequence consist of Dorud (82 m..)  Surmaq (258 m..) and Julfa (108 m.) formations respectively. The main lithology consist ...  Read More

Original Research Paper
22. Origin of Zoned Pyroxene in the Daykes of Sub Alkali Andesite of Hassan-Abaad Village of Yazd- South-West of Taft

S. Zandifar; M. V. Valizadeh; M. A. Barghi; M. R. Foroodi Jahromi

Volume 20, Issue 77 , January 2010, Pages 151-156

http://dx.doi.org/10.22071/gsj.2010.55366

Abstract
  In the west and north west of Hassan-Abaad village of Yazd, massive dikes of alkali andesite in the diorite, quartz diorite and granodiorite are observed. Clinopyroxene phenocrysts in these rocks have obvious zoning. Reconnaissance work indicates that groundmass pyroxenes in the alkaline rocks are similar ...  Read More

Original Research Paper
23. Studying Yazd Subsidence Using InSAR and Precise Leveling

M. Amighpey; S. Arabi; A. Talebi

Volume 20, Issue 77 , January 2010, Pages 157-164

http://dx.doi.org/10.22071/gsj.2010.55368

Abstract
  Blemish of subsidence and land ruptures such as destroying aquifer systems, damaging structures and disordering water main, are usually irreparable and expensive. One of the regions with a high rate subsidence in Iran is the Yazd-Ardakan plain that subsides with a maximum rate of 12 cm per year based ...  Read More

Original Research Paper
24. Petrography and Geochemistry of Dolomites in Kangan Formation, Persian Gulf

N. Khodaei; M. H. Adabi; S. A. Moallemi; M. Moradpour

Volume 20, Issue 77 , January 2010, Pages 165-174

http://dx.doi.org/10.22071/gsj.2010.55370

Abstract
  The Kangan Formation is a carbonate-evaporate sequence that is considered as a part of the largest carbonate reservoir in the South Pars Field at Persian Gulf. Petrography analysis led to the recognition of 5 different dolomite types: such as dolomicrite, dolomicrospar, dolospar, dolomite cement and ...  Read More

Original Research Paper
25. Comparision of Carboniferous- Permian deposits in Abadeh Areas (Banarizeh & Esteghlal Sections) with Neighborhood Area based on Conodont

M. Nouradiny; S. Rahmati; M. Yazdi

Volume 20, Issue 77 , January 2010, Pages 175-180

http://dx.doi.org/10.22071/gsj.2010.55371

Abstract
  The studied sections are located in southwestern of central Iran. Main lithology of these sections are including shale, sandstone and limestone. Four biozones had been recognized base on Conodont. That contain Idiognathodus delicates Zone, Streptognathodus oppletus Zone, Sweetognathus whitei Zone. And ...  Read More

Original Research Paper
26. Source Parameters of the February 1997 Garmkhan Earthquake (North-East Bojnourd), Northeast Iran

M. Aminipanah; M. R. Gheitanchi; M. Ghorashi

Volume 20, Issue 77 , January 2010, Pages 181-187

http://dx.doi.org/10.22071/gsj.2010.55373

Abstract
  The Bojnourd earthquake occurred in a mountainous area in North Khorasan provinc. The mainshock produced extensive destruction. Field investigation and aftershocks distribution suggest a NW-SE trend faulting. The distribution of locally recorded aftershocks was extended to a length of about 40-50 km ...  Read More