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)
Volume 16 (2007)
Petrology
Mineral chemistry of Cr-Spinel in the Sargaz-Abshur ultramafic-mafic intrusion, SE of Iran : An implication to tectonic setting of the intrusion

Seyed Ali Akbar Asadi; Habibollah Ghasemi; Mohsen Mobasheri

Volume 32, Issue 4 , December 2022, , Pages 103-118

https://doi.org/10.22071/gsj.2022.317848.1960

Abstract
  Sargaz-Abshur (Sikhoran) ultramafic-mafic complex, which is situated in Esfandagheh area, SE Sanandaj-Sirjan metamorphic- magmatic zone,  intruded into Upper Paleozoic- Triassic metamorphic rocks and covered by Jurassic sedimentary rocks. This complex consists of harzburgite and porphyroclastic ...  Read More

Petrology
Mineral Chemistry and Whole Rock Isotope Chemistry: an aperture to petrogenesis of the Abbasabad basaltic- andesitic rocks, east of Shahrood

Habibollah Ghasemi; Mahbubeh Arabzadeh Baniasadi; mojtaba rostami hosuri

Volume 30, Issue 118 , January 2021, , Pages 135-144

https://doi.org/10.22071/gsj.2020.215769.1741

Abstract
  The Abbasabad Eocene volcano-sedimentary belt in the east of Shahrood includes of basaltic-andesitic rocks and related pyroclastics along with interlayers of sedimentary rocks. The volcanic rocks include olivine basalt, trachybasalt, trachy andesybasalt, trachyandesite and andesite with various textures ...  Read More

Petrology
Petrology and geochemistry of adakitic dacites of the Qarah Chay Neogene caldera, SE Quchan

Marzieh Asadi-Avargane; Mehdi Rezaei-Kahkhaei; Habibollah Ghasemi

Volume 29, Issue 114 , December 2019, , Pages 241-250

https://doi.org/10.22071/gsj.2019.171867.1614

Abstract
  The Qarah Chay Neogene caldera is located at 30 km SE Quchan in the Binalud Zone. The volcanic rocks of the caldera are mainly dacite in composition and composed of plagioclase and amphibole. The rocks present a variety of porphyry, microlitic porphyry, sieve, trachytic and glomeroporphyritic textures. ...  Read More

Mineral chemistry and petrogenesis of metabasites of metamorphic - igneous Shotor-Kuh complex (SE Shahrood) an indicator for evolution of intracontinental extensional basins of late Neoproterozoic

S. Shekari; M. Sadeghian; M. Zhai; H. Ghasemi; Y. Zou

Volume 27, Issue 105 , December 2017, , Pages 167-182

https://doi.org/10.22071/gsj.2017.54181

Abstract
  Metamorphic - igneous Shotor-Kuh complex is located in the 80 km of SE Shahrood and in the northern edge of the central Iran structural zone. This complex includes a wide lithological composition range such as metapelite (micaschists and gneisses), metapsammites, metabasites (amphibolite and garnet amphibolite), ...  Read More

Geochemistry and Tectonic setting of high silica adakitic domes Of Ahmad Abad Khartouran (South East of Shahrood)

F Yousefi; M Sadeghian; S Samyari; H Ghasemi

Volume 25, Issue 100 , September 2016, , Pages 291-298

https://doi.org/10.22071/gsj.2016.40763

Abstract
  In Ahmadabad Khartouran region located in 175 Km southeast of Shahrood, A significant number of adakitic domes crop out, which intruded into the Paleocene- Eocene volcanosedimentary rocks. Lithological compositions of these domes include andesite, trachyandesite, trachyandesite and dacite. Pyroxene (augite), ...  Read More

Back-arc extensional magmatism in the Oligo-Miocene basin of the Northern edge of Central Iran

H Ghasemi; M Rostami Hossuri; M Sadeghian; F Kadkhodaye Arab

Volume 25, Issue 99 , June 2016, , Pages 239-252

https://doi.org/10.22071/gsj.2016.40915

Abstract
  Subduction of the Neo–Tethyan oceanic lithosphere beneath the southern edge of the Central Iran caused development of extensional back-arc basins behind the Urumieh–Dokhtar magmatic belt during Mesozoic and Cenozoic. Some researchers have noted formation of the oceanic back-arc basins in ...  Read More

Interpretation of magnetic fabrics based on variations of anisotropy of magnetic susceptibility (AMS) in Bouin- Miandasht granitoid pluton

S Saki; H Ghasemi; M Sadeghian

Volume 25, Issue 98 , March 2016, , Pages 385-394

https://doi.org/10.22071/gsj.2016.41261

Abstract
  Bouin- Miandashtgranitoid pluton with an area of 40 Km2, outcropped in the north of Bouin Miandasht- Aligoudarz road, was emplaced into Triassic to early Jurassic low to medium grade metapelitic rocks of Sanandaj - Sirjan structural zone. This pluton composed of alkali feldspar granite to leucogranite. ...  Read More

Comparision of the Mafic Igneous Rocks from the Ghelli Formation (Upper Ordovician) and the Gorgan Schists in the Eastern Alborz Zone

H Ghasemi; Z Kazemi; SH Salehian

Volume 24, Issue 96 , September 2015, , Pages 263-276

https://doi.org/10.22071/gsj.2015.41771

Abstract
  On the basis of stratigraphical studies, parental rocks of the Gorgan schists have same petrological features and fossil contents as the Ghelli formation in the eastern Alborz Zone and despite to the previous theories, these schists are not Precambrian in age. Also, the mafic igneous rocks of these two ...  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

Geochemical and Environmental Assessment of the Heavy Metals in the Soils Derived from the Gorgan Schists

H. Ghasemi; Mojtaba. Garavand; N. Hafezi Moghddas

Volume 22, Issue 86 , December 2012, , Pages 35-46

https://doi.org/10.22071/gsj.2012.54055

Abstract
  In this paper, the role of Gorgan metamorphic complex, as a geogenic source of the heavy metals has been investigated in the soils of south Kordkoy and Gorgan areas. For this, some important soil chemical parameters such as pH, EC, CEC, and concentrations of the heavy metals in 14 soil samples and 6 ...  Read More

Petrogenesis of Chah Salar Granitoidic Pluton (SW of Neishabour)

M. Sadeghian; H. Ghasemi; Z. Farsi

Volume 19, Issue 75 , January 2010, , Pages 133-150

https://doi.org/10.22071/gsj.2010.55458

Abstract
  Chah Salar granitoidic pluton is located in the N of Chah-Salar village, SW of Neishabour, in the northern margin of structural Central Iran zone. This pluton intruded in Sabzevar ophiolitic Zone and based on the field observations, petrographical and geochemical classification diagrams, its lithological ...  Read More

Geochemistry of Quartz- Tourmaline Vein in Bagho Granitoid Body, Damghan, NE Iran

G. Ghorbani; H. Ghasemi

Volume 18, Issue 72 , January 2009, , Pages 89-96

https://doi.org/10.22071/gsj.2010.57145

Abstract
  Bagho granitoid is located in the southeast of Damghan and has been cut by many quartz-tourmaline veins with about 1 mm to 30 cm thickness. Based on petrography and electron microprobe analyses, these tourmalines show schorl– dravite– foitite composition with a tendency toward schorl end ...  Read More

Petrology, Geochemistry and Tectonomagmatic Setting of the Silijerd Intrusion, Northwest Saveh

H. Ghasemi; A. Ramazani; A. Khanalizadeh

Volume 17, Issue 67 , February 2008, , Pages 68-85

https://doi.org/10.22071/gsj.2009.57785

Abstract
          Silijerd intrusion with an age of Late Eocene – Oligocene (39.23.2 Ma) is located in Uromeyeh-Dokhtar magmatic arc, central Iran structural zone, northwest Saveh. This intrusion is composed of a continuous compositional range including: diorite/gabbro, ...  Read More