Volume 34 (2024)
Volume 33 (2023)
Volume 32 (2022)
Volume 31 (2021)
Volume 30 (2020)
Volume 29 (2020)
Volume 28 (2019)
Volume 27 (2018)
Volume 26 (2017)
Volume 25 (2016)
Volume 24 (2015)
Volume 23 (2014)
Volume 22 (2013)
Volume 21 (2012)
Volume 20 (2011)
Volume 19 (2010)
Volume 18 (2009)
Volume 17 (2008)
Original Research Paper
Partial Melting of Pelites and Semi-Pelites in the Kalaybar Thermal Aureole, NW Iran

M. Moazzen; R. Hajialioghli

Volume 16, Issue 64 , March 2007, Pages 2-13


         Intrusion of the Kalaybar nepheline syenite and nepheline gabbro into the Cretaceous pelitic and calcareous rocks during Eocene-Oligocene has caused the development of a thermal aureole up to 1 km thick. The contact between igneous and country rocks is sharp. The ...  Read More

Original Research Paper
Biostratigraphy of Calcareous Nannofossils of Gurpi Formation in North Gachsaran

F. Hadavi; K. Khosrow Tehrani; S. Senemari

Volume 16, Issue 64 , March 2007, Pages 14-23


  Nannofossils are good for biostratigraphy, since they are abundant, planktonic, rapidly evolving and largely cosmopolitan especially in the Late Cretaceous. With respect to this reality and due to the lack of any precise paleontological study, the nannofossils of Gourpi Formation were investigated in ...  Read More

Original Research Paper
The 2004 May 28 Firoozabad-Kojour (Iran) Earthquake, Ms 6.3, and its Aftershocks based on Recorded Data at Local Seismological Stations

M. Tatar; A. M. Farahbod

Volume 16, Issue 64 , March 2007, Pages 24-37


             A moderate earthquake (Ms=6.3) struck the coastal region of north of Iran and the central Alborz on 28 May, 2004 was responsible of several damages and about 35 casualties. The mainshock was followed by a large number of aftershocks, the largest ...  Read More

Original Research Paper
New Insight to Paleogeography and Structural Evolution of the Alborz in Tethyside

H. Nazari; J-F. Ritz; S. Oghbaee

Volume 16, Issue 64 , March 2007, Pages 38-53


  Development and evolution of Tethys basins during geological history from the Precambrian to Paleogene has been considered by many geoscientists.  The first sign of various basins propagation of Tethys which resulted in separation of supercontinents, ancient lands (such as Eurasia, Gondwana) and ...  Read More

Original Research Paper
Folding Style in Metamorphic Rocks of Faryab Area(South-East of Sanandaj-Sirjan Zone)

SH. Shafiei Bafti; S.A. Alavi; M. Mohajjel

Volume 16, Issue 64 , March 2007, Pages 54-73


       Faryab area at the southeastern part of the Sanandaj-Sirjan zone, containing the Paleozoic rocks in the internal part of Zagros Orogen, displays two folding episodes through a progressive deformation event. Axial planes of recumbent F1 folds dip moderately to the north and the ...  Read More

Original Research Paper
Morphotectonic Investigation of Kopeh-Dagh – Binalud Region based on Stream-Gradient Indices & Hypsometric Integral

N. Haghipour

Volume 16, Issue 64 , March 2007, Pages 74-87


          Folded and faulted Kopeh Dagh-Binalud belt in the northeast of Iran is a part of Eurasia and southern margin of Touran plate. What is now observed is the result of the latest Phase of Alpine folding. The morphology of the area is in early stage and its young ...  Read More

Original Research Paper
An Investigation on the Possibility of Two-Dimensional Joint Inversion of TE and TM Modes Data in Magnetotelluric (MT) Survey using Artificial Neural Network

A. Moradzadeh; F. Tahmasbi; M. Fateh

Volume 16, Issue 64 , March 2007, Pages 88-101


         The magnetotelluric (MT) method is a natural source electromagnetic geophysical technique, which is used mainly in petroleum, mineral and geothermal exploration. As in this method, the quantity of the measured data is bulky and have a complex structure, their modeling, ...  Read More

Original Research Paper
Optimally Uncertainty Estimation for Linear Inversion

A. Gholami; M. Javaherian

Volume 16, Issue 64 , March 2007, Pages 102-111


          In experimental sciences we often need to solve inverse problems. That is, we want to obtain information about the internal structure of a physical system from indirect noisy observations. Information about the errors in the observations is essential to solve ...  Read More

Original Research Paper
Structural Analysis of Mosha Fault in the Northeast of Tehran

S. Bahiraie; M. Abbasi; M. Almasian

Volume 16, Issue 64 , March 2007, Pages 112-125


  Generally the most important factor in the structural evolution of Alborz is thrust and reverse faulting that often has an east-west trend, parallel to the mountain chain. Mosha fault, one of the main faults, in this study covers the area between longitudes 51˚, 30´ to 51˚, 45´ including ...  Read More

Original Research Paper
Study of Planktonic Foraminifera and Biozonation in Abderaz Formation

L. Bakhshandeh; A. Aghanabati; F. Keshani; T. Mohtat

Volume 16, Issue 64 , March 2007, Pages 126-135


       To revise the Abderaz Formation in Koppeh-Dagh basin, its type section was studied considering stratigraphical properties. The main lithology of Abderaz Formation includes gray to blue shale with a thickness of 286.86 meters. This Formation has an attitude of N 45˚ W and 80˚ ...  Read More

Original Research Paper
Variation of Moho Depth in the Central Alborz

A. H. Rajaee; M. Mokhtari; K. Priestley; D. Hatsfeld

Volume 16, Issue 64 , March 2007, Pages 136-147


  Using teleseismic body waves, this paper presents the crustal and lithospheric structure in the central part of the AlborzMountains for the first time. The region has been known as a very active and seismogenic locations in the past, characterized by strong earthquakes and complex structures. Tehran, ...  Read More

Original Research Paper
Potential of Hydrocarbon Generation of Pabdeh and Gurpi Formations on the Basis of ∆LogR and Neural Network Techniques in Wells A and B in an Oil Field in the South-West Iran

M. Paryab

Volume 16, Issue 64 , March 2007, Pages 148-157


  Hydrocarbon source rocks, the subject of various analyses and investigations, are well appreciated because of their capacity for oil generation. In the present study, attempts were made to evaluate source rock using a leap cost analytical method. For this purpose, some samples from these formations were ...  Read More

Original Research Paper
The First Report of Two Gymnosperms Plant Macrofossil Species (Order Bennettitales) from Iran

J. Saadat Nejad

Volume 16, Issue 64 , March 2007, Pages 158-165


  Investigation on plant macrofossils of the Jurassic sediments of Shemshak Formation in Eshkevarat-e-Olia area has been resulted in introducing two species, consisting of Ptilophyllum sahnii and Ptilophyllum sakrigaliensis. Thesespecies belong to Phylum Cycadophyta and order Bennettitales. The above mentioned ...  Read More

Original Research Paper
Magmatic Evolution in Quaternary Basaltic Rocks in Ghorveh – Takab Axis

S. Malecootyan; Sh. Hagh-Nazar; M. Ghorbani; M. H Emami

Volume 16, Issue 64 , March 2007, Pages 166-178


       Petrological,geochemical and isotropic evidence of crustal contamination of the Quaternary basic rocks of Ghorveh-Takab axis is presented in this paper. These rocks are olivine basalt and basalt and they are plotted in the field of alkaline suites in geochemical diagrams. Some ...  Read More

Original Research Paper
The Role of Earthquake and the Historical Events in Devastation of the City of Shadyakh

A. Kangi; A. Rastgou; F. Ebrahimi; N. Kangi

Volume 16, Issue 64 , March 2007, Pages 179-185


  Shadyakh, commonly deemed as the headquarters of NeishabourCity, has so far endured such various events as war, earthquake, and other natural disasters. What has been revealed through recent archeological excavations convincingly depicts a brilliant scientific, cultural, and political manifestation of ...  Read More