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)
Volume 16 (2007)
Petrology
Tectonic environment and petrogenesis of igneous rocks of Tashvir area, Tarom mountains, northwest of Iran

Reza Jamal Omidi; Saeid Hakimi Asiabar; Shahrooz Haghnazar; Mansour Vosoghi Abedini

Volume 32, Issue 2 , July 2022, , Pages 105-120

https://doi.org/10.22071/gsj.2022.305126.1936

Abstract
  Tarom mountains are located at the southwestern end of the Alborz mountain range with an approximate northwest-southeast direction. Tashvir region is a part of the northern margin of the Tarom mountains. Most igneous rocks in this area include basalt, andesitic basalt, and interlayers of tuff. Enrichment ...  Read More

Stratigraphy and Palaeontology
Circulichnis and other trace fossils from Member 5 of Mila Formation in Tuyeh-Darvar section, Eastern Alborz Mountain, north Iran

Nasrollah Abbassi; Reza Aharipour

Volume 31, Issue 4 , December 2021, , Pages 1-12

https://doi.org/10.22071/gsj.2021.285607.1903

Abstract
  Mila Formation includes five members in the Tuyeh-Darvar section, west Damghan. Fifth Member of formation comprises alternations of calcareous shale, limestone and green shales. Trace fossils of this member includes Cruziana problematica, Gordia isp., Helminthopsis abeli, Helminthopsis tenuis, Palaeophycus ...  Read More

Stratigraphy and Palaeontology
First record of Middle and Late Jurassic of benthic foraminifera from Estern Alborz (Goznawwi section) and Koppeh Dagh (Chaman Bid section)

Tayebe Sarbandi Farahani; Mehdi Yazdi; Mahmoud Reza Majidifard

Volume 29, Issue 115 , June 2020, , Pages 301-312

https://doi.org/10.22071/gsj.2019.121419.1427

Abstract
  This paper focused on the systematic of the benthic foraminifera from the Chaman Bid and Goznawwi sections. At the type locality of the Chaman Bid Formation, consists of alternation of limestone (grainstone to wackstone), argilasious limestone and marl. The age of tha Chaman Bid Formation based on ammonite ...  Read More

Tectonics
Structural deformations of Dona mine

Saeid Hakimi Asiabar

Volume 28, Issue 110 , December 2018, , Pages 235-246

https://doi.org/10.22071/gsj.2017.78835.1052

Abstract
  Abstract The area of Dona mine is a part of central Alborz. The Dona anticline is a part of pop up structure and located between Kandavan and Azadkuh thrust faults. In this research three sets of major faults are recognized. The first category of faults with W-E trend, dip 40-50, Rake angle more than ...  Read More

Tectonosedimentary evolution of the basins in Central Alborz, Iran

Mohammad Reza Sheikholeslami

Volume 27, Issue 106 , March 2018, , Pages 29-38

https://doi.org/10.22071/gsj.2018.58353

Abstract
  Evidence of at least ten different tectonic- controlled sedimentary basins can be recognized in the central part of the Alborz Mountains in the Middle part of the Alpine-Himalayan belt. They formed from Neoprotrozoic to recent time as the results of the relative plate motion in southwest of Asia in Tethyan ...  Read More

Origin and tectonomagmatic setting of Quaternary volcanism in Alamut Valley

B. Hosseini; M. Mohammadi Siyani; A. R. Ahmadi

Volume 27, Issue 106 , March 2018, , Pages 57-66

https://doi.org/10.22071/gsj.2018.58321

Abstract
  Quaternary volcanic activities in Alamut Valley occurred in three stages and covered Neogene red sedimentary rocks. The volcanic rocks are intermediate in composition and are classified as hornblende trachyandesite. The SiO2 content of the rocks varies in a range from 55.48-61.88 wt%. Chondrite normalized ...  Read More

Depositional environment and sequence stratigraphy of the Jeirud Formation in Deh-Sufian section, central Alborz

M Khazaee; M Hosseini-Barzi; A Sadeghi; H Mosaddegh

Volume 26, Issue 102 , March 2017, , Pages 101-116

https://doi.org/10.22071/gsj.2017.44130

Abstract
  The Jeirud Formation (Upper Devonian) in Deh-Sufian section of northeast of Shahmirzad consists of siliciclastic and carbonate deposits. In the study area lower boundary of the Jeirud Formation with fine grain clastic deposits of the Mila Formation is erosional (Disconform) and has been conformably overlain ...  Read More

Plant fossil remains from the Kalariz formation in the East Yurt mine, Azadshahr and its correlation with other florizones in Iran and the world

F Vaez-Javadi

Volume 25, Issue 99 , June 2016, , Pages 95-110

https://doi.org/10.22071/gsj.2016.40794

Abstract
  The East Yurt mine, SE Azadshahr, Golestan Province contains well preserved plant macrofossils containing nineteen species allocated to thirteen genera of various orders viz., Equisetales, Filicales, Cycadales, Bennettitales, Ginkgoales, and Coniferales. The plant macrofossils in this area are studied ...  Read More

Geometry and Recent Kinematics of the North Qazvin Fault: Morphotectonics Approach

B Taherkhani; H Nazari; M Pourkermani; M Arian

Volume 24, Issue 95 , June 2015, , Pages 29-38

https://doi.org/10.22071/gsj.2015.41781

Abstract
  The E-W trending North Qazvin Fault is situated in north & northeast of Qazvin city in south-central Alborz. Across the fault, Karaj formation (Eocene) is thrusted over Hezardarreh Formation (A) and the alluvial B Formation. It could be the source for the 1119 AD earthquake with an estimated magnitude ...  Read More

Crustal Structure in the Eastern Part of the Alborz Mountains (Iran) from Converted P wave Phases

N Afsari; F Taghizadeh-Farahmand; M.R Ghassemi

Volume 24, Issue 95 , June 2015, , Pages 49-56

https://doi.org/10.22071/gsj.2015.41849

Abstract
  The AlborzMountains are part of the Alpine-Himalayan orogenic belt, situated to the south of the Caspian Sea and north of the Central Iran. . The region is undergoing extensive crustal deformation and shortening between the north-central Iran and the rigid SouthCaspianBasin crust. In this study, we used ...  Read More

The Magnetic Characteristics of Sandstone Rocks of Shemshak Group in Response to Application of Geomagnetic Methods

Z Hamidi Beheshti; H Alimohammadian; M Talebian; A Shahidi; M.R Ghassemi

Volume 24, Issue 95 , June 2015, , Pages 153-164

https://doi.org/10.22071/gsj.2015.42306

Abstract
  Geomagnetism is one of the most applied techniques of geophysics in geology. Today, this method is applied in different disciplines such as Magnetic fabric of rocks, palaeomagnetism and environmental magnetism. Each of these magnetic methods is suitable for a particular lithology. Therefore, the potential ...  Read More

Geomorphic Signatures of Active Tectonics in the Chalus Drainage Basin in Alborz, Iran

M Haj Manuchehri; M Arian; M Ghorashi; A Solgi; A Sorbi

Volume 24, Issue 95 , June 2015, , Pages 273-280

https://doi.org/10.22071/gsj.2015.42072

Abstract
  Geomorphic indices of active tectonics are useful tools to analyze the influence of active tectonics. These indices have the advantage of being calculated from ArcGIS and Remote Sensing software packages over large areas as a reconnaissance tool to identify possible geomorphic anomalies related to active ...  Read More

Tectono-Magmatic Setting of Cretaceous Pillow Basalts in the north Part of The Alborz Mountains in East of Guilan Province (North of Iran): A Part of Ophiolite Sequence or Intra-Continental rift?

Sh Haghnazar; S Malakotian; Kh Alahyarii

Volume 24, Issue 94 , March 2015, , Pages 171-182

https://doi.org/10.22071/gsj.2015.42908

Abstract
  The pillow basalts, Cretaceous in age, outcrop in the northern part of Alborz in the East of Guilan province (north of Iran). The pillow lavas are mainly olivine basalts. From geochemical point of view, these rocks are transitional or mildly alkalic series and negative anomaly of Nb-Ta, Zr, Ba; positive ...  Read More

Slip Sense Inversion on the Koushk-e-Nosrat Fault, North Saveh

K Orang; M Mohajjel; G.R Tajbakhsh

Volume 24, Issue 1393 , March 2015, , Pages 315-328

https://doi.org/10.22071/gsj.2015.43429

Abstract
  The kinematic analysis of the Koushk-e-Nosrat Fault (striking WNW-ESE) at north Saveh city indicates that since a time after early Miocene it has been inverted from dextral strike-slip (and reverse-dextral-oblique slip) to reverse-sinistral (and sinistral strike-slip( displacement. The Kinematic evidences ...  Read More

Sequence Stratigraphy of Members 1, 2, and 3 of the Mila Formation in Eastern Central Alborz

H Amin-Rasouli; Y Lasemi; S Zaheri

Volume 23, Issue 91 , June 2014, , Pages 25-38

https://doi.org/10.22071/gsj.2014.43751

Abstract
  The middle Cambrian-early Ordovician transgression in the AlborzMountains resulted in the deposition of members 1 through 3 of the Mila Formation showing an overall transgressive trend. This succession is bounded unconformably by the Top-Quartzite of the Lalun Formation at the below and member 4 of the ...  Read More

Geology and Petrology of the Soltan Maydan Basaltic Complex in North-Northeast of Shahrud, Eastern Alborz, North of Iran

M Derakhshi; H Ghasemi; T Sahami

Volume 23, Issue 91 , June 2014, , Pages 63-76

https://doi.org/10.22071/gsj.2014.43771

Abstract
  The Soltan Maydan Basaltic Complex indicates the most important, thickest, and most voluminous early Paleozoic magmatic activity in Iran outcropping in the eastern Alborz structural zone, in the north-northeast of Shahrud. This complex overlies the late Ordovician Ghelli Formation and is overlain by ...  Read More

Ichnology on Geirud Formation in the Hangenberg Mass Extinction Event (Famennian-Touranaisian), Zaygon Section, Central Alborz

A Bayat Gol; N Abbassi

Volume 23, Issue 89 , December 2013, , Pages 33-48

https://doi.org/10.22071/gsj.2013.44016

Abstract
  A detailed ichnological study on the Geirud Formation (Late Devonian-Early Carboniferous) from the Zaygon area, central Alborz shows a diverse trace fossils, which include 14 ichnogenera represented by 23 ichnospecies. These trace fossils contains various ethological patterns, such as domichnia, fodinichnia, ...  Read More

New Structural Evidence of Alborz Fault (North Qom), Evidence for Transfer of Inversion from Central-west Alborz Faults to the Same Oriented Faults in South Alborz

R. Elyaszadeh; M. Mohajjel; B. Farahani; S. R. Jafari

Volume 21, Issue 83 , December 2012, , Pages 13-22

https://doi.org/10.22071/gsj.2012.54511

Abstract
  Structural analysis of the NW-SE oriented Alborz fault in north Qom, demonstrates young left-lateral reverse displacement evidence, based on the rake of the striations on young fault planes (45-53). Strong structural evidence exists for its previous right-lateral reverse displacement. Young left-lateral ...  Read More

Facies Analysis and Environmental Interpretation of Planolites and Palaeophycus Trace Fossils from Paleozoic Sediments of Mid-Iran Zone

A. Bayat Gol; N. Abbassi; A. Mahboubi; R. Moussavi-Harami; H. Amin Rasouli

Volume 21, Issue 83 , December 2012, , Pages 185-196

https://doi.org/10.22071/gsj.2012.54543

Abstract
  Some of Paleozoic sediments from Alborz and Central Iran subzones from Mid-Iran zone evaluated for distinction of Palaeophycus and Planolites ichnofossils. These sediments include Shale Member of Lalun Formation, Shirgesht Formation, member 5 of Mila Formation and Geiroud Formation.  A diverse ichnofauna  ...  Read More

Organic Matter Characterization and Thermal Modeling of the Basal Black Shale from the Shemshak Group (Upper Triassic- Middle Jurassic) in the Tazareh Section, Eastern Alborz, Northern Iran

Ali Shekarifard; F. Baudin; K. Seyed-Emami; J. Schnyder; H. Rahimpour-Bonab

Volume 21, Issue 83 , December 2012, , Pages 219-228

https://doi.org/10.22071/gsj.2012.54549

Abstract
  Geochemical characteristics (Rock-Eval pyrolysis and elemental analysis of kerogen), palynofacies and organic petrography (using light transmitted-reflected-uv microscopy) of the basal black shale from the Shemshak Group (Upper Triassic- Middle Jurassic) in the Tazareh section (Eastern Alborz) have been ...  Read More

Carboniferous Conodonts Biostratigraghy in Kiyasar Region and Introduction 7 Biozones Comparable to World Standard Conodont Zonation

A. Fallah; B. Hamdi; H. Mosaddegh

Volume 20, Issue 78 , December 2011, , Pages 117-122

https://doi.org/10.22071/gsj.2010.54621

Abstract
  The studied section (Kiyasar)is situated in Central Alborz,75 Km. southeast of Sari. The thickness of Carboniferous sequences (Mobarak Formation) is 385 meter and consists of thin-bedded limestone at the base and various thickness of limestone (mostly with medium thickness) with intercalations of shales ...  Read More

Tectonic Evolution of the Alborz in Mesozoic and Cenozoic

Alireza Shahidi; E. Barrier; M.-F. Brunet; A. Saidi

Volume 21, Issue 81 , December 2011, , Pages 201-216

https://doi.org/10.22071/gsj.2011.54384

Abstract
  In northern Iran the Eo-Cimmerian orogeny resulting from this collision is associated with a regional unconformity and a major change in sedimentation. From Norian to middle Bajocian (Shemshak group), 030° trending extension is indicated by syndepositional normal faults. We assign this extensional ...  Read More

Active Tectonics of Alborz Mountain using Continuous GPS Measurements

F. Khorrami; K. Hessami; H.R. Nankali; F. Tavakoli

Volume 21, Issue 82 , December 2011, , Pages 223-230

https://doi.org/10.22071/gsj.2011.54507

Abstract
  We present the results of continuous GPS measurements to interpret present-day kinematic along and across northern Iran (i.e. the Alborz mountain range and northern part of Central Iranian Block (CIB)). In this study velocity field and geodetic strain rate of 30 CGPS stations from 2005 to 2009 were calculated ...  Read More

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

https://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

Kinematic and Geometry of the Taleghan Active Fault: On the Basis of Morphotectonics Studies, (Central Alborz, Iran)

H. Nazari; J-F. Ritz

Volume 18, Issue 71 , January 2009, , Pages 173-177

https://doi.org/10.22071/gsj.2010.57011

Abstract
  The Taleghan Fault is located at the southern side of Taleghan valley in Central Alborz, 50 km north west of the Tehran mega city. Usually described as a south-dipping reverse fault, it could be the source of some of the strongest historical earthquakes recorded in the Tehran region, notably the 958 ...  Read More