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
Geochemistry and petrology of Upper Triassic basic volcanic rocks in the Central Alborz region, south of Pole Sefid.

saeid samarbakhsh; mohamad hashem emami; Seyed mojtaba Mortazavi; mansor vosoghi abedini

Articles in Press, Corrected Proof, Available Online from 02 March 2022

https://doi.org/10.22071/gsj.2022.314965.1954

Abstract
  The study area, situated 50 km north of Ghaemshahr, structurally belongs to the Central Alborz tectonic zone. The volcanic rocks of the area, including basalt, andesite, trachyandesite, and dolerite are the products of fractional crystallization and some contamination processes. Clinopyroxene, olivine, ...  Read More

Orientation of Carboniferous-Permian extension phase in the Central Alborz: paleostress analysis on the growth fault data

Akbar Jabbari; Asghar Dolati; Alireza Shahidi; Amin Behrooz

Volume 28, Issue 112 , August 2019, , Pages 147-156

https://doi.org/10.22071/gsj.2018.81239.1073

Abstract
  Abstract: The Alborz Mountain range is formed by collision between the Central Iran and Eurasia plates, since Late Triassic. Facieses studies on the Alborz and Central Iran indicate sedimentation in shelf and epicontinental shelf in passive margin of Gondwana during Paleozoic Era. This study represents ...  Read More

Mineral chemistry of the Permian basalts from North of Baladeh Central Alborz: Geothermobarometry and tectonomagmatic setting

F. Rostami; M. Delavari; S. Amini; A. Dolati

Volume 27, Issue 106 , March 2018, , Pages 3-14

https://doi.org/10.22071/gsj.2018.58316

Abstract
  The Permian volcanic rocks of Central Alborz (northeast of Baladeh- Siahbisheh) crop out between Ruteh and Nesen Formations. The volcanic rocks are predominantly basaltic and plagioclase- phyric. Ferromagnesian minerals such as clinopyroxene and olivine are not modally abundant and sometimes are totally ...  Read More

Sequence stratigraphy of the Carboniferous deposits in Ayenehvarzan–Dalichai anticline, east of Tehran, Central Alborz

N Kohansal-Ghadimvand; SH Gholipouri; M.R Majidifard

Volume 25, Issue 100 , September 2016, , Pages 143-154

https://doi.org/10.22071/gsj.2016.40726

Abstract
  The early carboniferous Mobarak Formation was studied in southern flank of Ayenehvarzan–Dalichai anticline, in Aru and Seyedabad sections, east of Tehran. The aim of this study is to determine microfacies, interpretation of depositional environments and sequence stratigraphy of the Mobarak Formation.  ...  Read More

Conodonts Biostratigraphy of Mila Formation, Shahmirzad Section, Central Alborz, Iran

S Soleymani; B Hamdi; A.R Karimi Bavandpur

Volume 25, Issue 98 , March 2016, , Pages 137-146

https://doi.org/10.22071/gsj.2016.41182

Abstract
  The studied section is located in the southern flank of the Central Alborz, 5 kilometers north of Shahmirzad City in the Semnan province. This section is situated at 35° 48′ 40″ N latitude and 53° 16′ 59″ E longitude. The Mila Formation has 5 measurable members in Type ...  Read More

Facies, depositional environment and diagenesis of the Mobarak Formation in Valiabad area, Central Alborz

N Kohansal-Ghadimvand; Sh Gholipouri; P Ghazanfari; R Mahari

Volume 25, Issue 98 , March 2016, , Pages 237-248

https://doi.org/10.22071/gsj.2016.41220

Abstract
  The aim of this study is to determine microfacies and diagenetic processes of the Mobarak Formation with the age of early Carboniferous in Valiabad section, at Karaj-Chalus road.  The thickness of the formation at this section is 339 m and consists of limestone with intercalations of shale and marl. ...  Read More

Moment Tensor Solution of the Central - Western Alborz (Iran) Earthquakes Based on Regional Data

S Ansari; F Yaminifard; M Tatar

Volume 24, Issue 95 , June 2015, , Pages 359-368

https://doi.org/10.22071/gsj.2015.42126

Abstract
  In this study, 23 focal mechanisms were calculated by moment tensor inversion of small regionalـlocal earthquakes in the Western Alborz and surrounding areas using wave-form inversion method. Calculated reverse-fault focal mechanisms around the Khazar and Alborz Faults in the Central Alborz, considering ...  Read More

Study of the Lithostratigraphy and Biostratigraphy of Ammonite Fauna of the Dalichai Formation at the Mahdishahr Section, N Semnan

T Sarbandi Farahani; M.R Majidifard; M.R Kebriaee- Zadeh; M Mohammadi

Volume 24, Issue 94 , March 2015, , Pages 27-38

https://doi.org/10.22071/gsj.2015.42563

Abstract
  The Middle Jurassic rocks are widely distributed and superbly exposed in the AlborzMountains (Northern Iran). In the central part of the mountain range, near Mahdishahr (Northern Semnan), the Dalichai Formation, from the underlying conglomerate and sandstones of Shemshak Formation to the limestones of ...  Read More

Morphotectonic Markers and Active Faulting Research In Hashtgerd New Town, West Of Karaj

S Alimardan; Sh Solaymani Azad; M Ghorashi; M.R Ghorashi; B Oveisi; A Hatami

Volume 24, Issue 1393 , March 2015, , Pages 227-234

https://doi.org/10.22071/gsj.2015.43417

Abstract
  Due to urban population growth in recent decades and the need for decentralization of cities with limited facilities and increasing marginalization in the larger cities, construction of new cities around large towns has been considered by decision makers to develop a plan to create new cities around ...  Read More

Microseismicity and Seismotectonics of the Garmsar Area

M Tatar; S.M Momeni; F Yaminifard

Volume 24, Issue 1393 , March 2015, , Pages 289-298

https://doi.org/10.22071/gsj.2015.43426

Abstract
  The V shape kink of the AlborzMountains at its southern end reaches to the Garmsar city located 100 km southeast of Tehran metropolis. We investigated seismicity and seismotectonic features of the Garmsar area by precisely locating of microearthquakes recorded by our local dense seismological network ...  Read More

Geology, Mineralogy and Geochemistry of Bauxitic- Lateritic Horizon in the Deilaman- Eshkevarat Area, Central Alborz

M.R Omidvar Ashkalack; A Khakzad; N Nezafati; M.A.A Mokhtari; B Borna; S Rozbeh Kargar

Volume 23, Issue 92 , September 2014, , Pages 199-208

https://doi.org/10.22071/gsj.2014.43702

Abstract
  The studied area is located in the western part of the Central Alborz structural zone and contains a bauxitic- lateritic horizon between the Elika and Shemshak formations. This horizon belongs to the middle Triassic, and croups out with E-W trend in the four regions (trends) including Zard Kuh- Loriteh, ...  Read More

Petrogenesis of Akapol granitoidic intrusion Kelardasht area

M.A Sajadi Nasab; M Vosoughi Abedini; M.H Emami; M Ghorbani

Volume 23, Issue 91 , June 2014, , Pages 215-229

https://doi.org/10.22071/gsj.2014.43824

Abstract
  The studied granitoidic intrusion with about 50 km2 area is located in the SW of Kelardasht, one of the regions in MazandaranProvince. It is one of the pluton masses of the Central Alborz structural zone. The mass has an age between 54±4 and 56±3 million years (late Paleocene to early Eocene) ...  Read More

Palynostratigraphy of the Dalichai Formation at Talu section (NE Damghan) based on Dinoflagellate cysts

Z. Boroumand; E. Ghasemi- Nejad; M. R. Majidifard

Volume 22, Issue 87 , December 2013, , Pages 3-8

https://doi.org/10.22071/gsj.2013.53825

Abstract
  The Dalichai Formation at Talu section, 24 kilometers NE of Damghan is studied Palynologically. The Middle Jurassic sediments with a thickness of 168 meters in this section contain grey to green marl and grey marly limestone. A total of 35 samples were collected systematically and 200 palynological sildes ...  Read More

Geometry and Kinematic of the Garmsar Fault Since Neogene

Arman Heravi; H. Nazari; A. Shahidi; M. Talebian

Volume 22, Issue 88 , December 2013, , Pages 175-186

https://doi.org/10.22071/gsj.2013.53691

Abstract
  The Garmsar Fault with a length of about 75 km and E-W trend  is located in Garmsar.This Fault observed in north of Garmsar and  eastern part of central Alborz with slop toward north, continus east of Eyvanakey Fault. Base of the morphotectonical investigation, along the Garmsar Fault this ...  Read More

Plant Macrofossils from Tiar Area, South Amol, Dating and Correlation with the other Florizone of Iran

F. Vaez Javadi

Volume 21, Issue 83 , December 2012, , Pages 229-237

https://doi.org/10.22071/gsj.2012.54551

Abstract
  There is a well-preserved plant macrofossils florizone near the Tiar village, south Amol, Central Alborz, Iran. It contains abundant plant maccrofossils belonging to 9 taxa of various orders, such as Equisetales, Filicales, Bennettitales, Cycadales, Ginkgoales and Coniferales. Based on the occurrence ...  Read More

Palaeobathymetry of the Ziarat-Kola Section at the Upper Maastrichtian, Central Alborz, through Planktonic and Benthic Foraminifera

M. Asgharian Rostami; E. Ghasemi-Nejad; M. Shafiee Ardestani

Volume 20, Issue 78 , December 2011, , Pages 27-34

https://doi.org/10.22071/gsj.2010.54585

Abstract
  At this research are studied late cretaceous sediments at Ziarat-kola section, Central Alborz, in order to Palaeobathymetry and sea level change. These sediments are with about 200m thickness consist of monotonous Marl and limy marl. Based on Planktonic foraminifera gain Upper Maastrichtian stage (Abathomphalus ...  Read More

Composition and Quality of Coals in the Lavij Coal Deposit,Central Alborz, Iran

P. Navi; M. Yazdi; R. Esmailpur; A. Khakzad

Volume 20, Issue 78 , December 2011, , Pages 111-116

https://doi.org/10.22071/gsj.2010.54614

Abstract
  Lavij coal deposit is situated at a distance of 48 km SW of Amol, in Central Alborz coalfield, North of Iran. Lavij coal-bearing strata in ‍‍‍Central Alborz zone are within the Upper Triassic– Lower Jurassic formation. The coal-bearing sediments in this area are called Shemshak Formation ...  Read More

Geomorphic Signatures of Active Tectonics in the Talaghan Rud, Shah Rud and SefidRud Drainage Basins in Central Alborz, N Iran

Z. Mardani; M. Ghorashi; M. Arian; Kh. Khosrotehrani

Volume 20, Issue 78 , December 2011, , Pages 159-166

https://doi.org/10.22071/gsj.2010.54669

Abstract
  Geomorphic indices of active tectonics are useful tools to analyze the influence of active tectonics.These indices have the advantage of being calculate from ArcGIS and remote sensing packages over large area as a reconnaissance tool to identify geomorphic anomalies possibly related to active tectonics.This ...  Read More

Biostratigraphy and Studying the Hypothesis uses of Rugoglobigerina in Appointing the Paleosalinity in Central Alborz, Maastrichtian

M. Asgharian rostami; E. Ghasemi-Nejad; M. Shafiee ardestani; B. Balmaki

Volume 20, Issue 80 , January 2011, , Pages 23-32

https://doi.org/10.22071/gsj.2011.55133

Abstract
  In order to studying salinity and biostratigraphy in Central Alborz basin, two sections Jorband and Ziarat-kola are sampled and studied Planktonic foraminifera and Echinoids fossil. Studying of foraminifera In Ziarat-Kola section determining three biozone by planktonic foraminifera. 1: Racemiguembelina ...  Read More

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

https://doi.org/10.22071/gsj.2010.57324

Abstract
  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

Comparison of Seismic, Geologic and Geodetic Moment Rates in Central Alborz

M. Asadi sarshar; A. Bahroudi; M. Qorashi; M. R. Ghassemi

Volume 19, Issue 75 , January 2010, , Pages 19-24

https://doi.org/10.22071/gsj.2010.55424

Abstract
  Estimate of moment rate is comparatively reckoned as a new method for dealing with tectonic activities rate in different regions and it prepares the way for putting together different methods. In fact, moment rate states rate of energy which exists in deformation system. There are three different approaches ...  Read More

Geomorphic Signatures of Active Tectonics in the Karaj Drainage Basin in South Central Alborz, N Iran

R. Khavari; M. Ghorashi; M. Arian; Kh. Khosrotehrani

Volume 19, Issue 75 , January 2010, , Pages 67-74

https://doi.org/10.22071/gsj.2010.55438

Abstract
  The paper presents a method for evaluating relative active tectonics based on geomorphic indices useful in evaluating morphology and topography. Indices used include: stream length-gradient index (SL), drainage basin asymmetry (Af), hypsometric integral (Hi), ratio of valley-floor width to valley height ...  Read More

Calcareous Algae of the Permian Deposits in Central Alborz: An Environmental and Sequence Stratigraphic Approach

H. Mosadegh; M. Lankarani

Volume 19, Issue 76 , January 2010, , Pages 79-84

https://doi.org/10.22071/gsj.2010.55651

Abstract
  The carbonate facies of Permian in Gaduk area (Central Alborz) are dominated by calcareous algae. Study of the facies resulted in recognition of several species of Cyanobacteria, Dasycladacean and Gymnocodiacean green algae and also Phylloid algae. In the studied succession, Phylloid algae are identified ...  Read More

Lithostratigraphy and Biostratigraphy of the Dalichai Formation (Middle Jurassic) in Parvar Area, North of Semnan, Central Alborz

M. Shams; K. Seyed-Emami

Volume 19, Issue 75 , January 2010, , Pages 89-94

https://doi.org/10.22071/gsj.2010.55443

Abstract
  The Dalichai Formation and its ammonite fauna is studied for the first time in the Parvar area, Central Alborz. At Parvar the Dalichai Formation, with a thickness of about 70 m, consist of an alternation of grayish silty marls, marlstones, marly limestone and limestone and is subdivided into 5 members. ...  Read More

Structural Geometry of Taleqan Mountains; an Evidence for Structural Evolution of South Central Alborz Range from Inversion to Transpression Tectonics

S. Madanipour; A. Yassaghi

Volume 18, Issue 72 , January 2009, , Pages 127-134

https://doi.org/10.22071/gsj.2010.57154

Abstract
  Taleqan Mountains located in South-Central Alborz range accommodate one of the best stratigraphic sequences of the range. The area bounded by the Taleqan fault in the north and the Mosha fault in the south. These faults separate Paleozoic-Mesozoic rocks from southern and northern Tertiary rocks. In this ...  Read More