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)
Petrography and geochemistry of the volcanic rocks in north of Zavieh, southwest of Karaj

M. Ebrahimi; M. Rafiei

Volume 27, Issue 107 , June 2018, , Pages 63-74

https://doi.org/10.22071/gsj.2018.63757

Abstract
  Eocene pyroclastic-volcanic rocks, ranging in composition from basic to intermediate and acidic rocks, are widely exposed at north of Zavieh, southwest of Karaj. The pyroclastic-volcanic sequence is composed of basalt, trachy-basalt, basaltic trachy-andesite, andesite, trachy-andesite, trachydacite, ...  Read More

Petrology and geochemistry of the Aqkand acidic volcanic rocks and perlites, North of Zanjan

M Ebrahimi; H Kouhestani; M.A.A Mokhtari; M Feizi

Volume 26, Issue 101 , December 2017, , Pages 99-110

https://doi.org/10.22071/gsj.2016.41039

Abstract
  The Aqkand area is located at 48 km north of Zanjan and is a part of the Tarom subzone within the Western Alborz-Azerbaijan structural zone. Acidic rocks exposed in this area consist of Oligocene rhyolite-rhyodacite, perlite, pitchstone and ignimbrite. Rhyolites and rhyodacites are exposed as domes and ...  Read More

The Arpachay mineralization occurrence, north of Takab: an epithermal base metal mineralization in the Takab-Angouran-Takht-e-Soleyman metallogenic zone

L. Talebi; M. A. A. Mokhtari; M. Ebrahimi; H. Kouhestani

Volume 26, Issue 104 , September 2017, , Pages 281-296

https://doi.org/10.22071/gsj.2017.50296

Abstract
  Arpachay Pb-Zn-Cu mineralization occurrence is located in the Takab-Angouran-Takht-e-Soleyman metallogenic zone, 60 km north of Takab. Rock units exposed in the area consist of Oligo-Miocene volcanic, volcano-sedimentary and sedimentary units which are intruded by gabbroic and granodioritic plutons.  ...  Read More

Determining tectonomagmatic environment of the volcanic rocks in Northeast of the Gavkhuni playa lake using geochemical data

GH Abbasi; M Ebrahimi; M Sharifi; N Shirdashtzadeh; J Ahmadian

Volume 25, Issue 99 , June 2016, , Pages 84-94

https://doi.org/10.22071/gsj.2016.40793

Abstract
       The studied volcanic rocks to the northeast of the Gavkhuni playa lake are composed of rhyolite, trachydacite, trachyandesite and pyroclastic rocks including lithic tuff and volcanic breccia. Rhyolitic rocks have flow structure and hyalophyric texture with glassy to cryptocrystalline ...  Read More

Petrology and geochemistry of Homijan granitoid and associated felsic rocks (SW Behabad, Central Iran)

F Mohamadi; M Ebrahimi; M.A.A Mokhtari

Volume 25, Issue 98 , March 2016, , Pages 223-236

https://doi.org/10.22071/gsj.2016.41219

Abstract
  The study area,~12 km to the southwest of the city Behabad, is a part of the Posht-e-Badam Block in Central Iran. Igneous rocks in the area occur as intrusive, sub-volcanic and volcanic bodies and exhibit a wide range of composition from felsic to mafic. The intrusive and sub- volcanic rocks include ...  Read More

Mineralization, Mineralogy, Structure and Texture of Chehrabad Sedimentary Cu Deposit, Northwest of Zanjan

Z Bikdeli; M Ebrahimi; Gh Nabatian; M.A.A Nabatian

Volume 24, Issue 96 , September 2015, , Pages 249-262

https://doi.org/10.22071/gsj.2015.41770

Abstract
  Chehrabad Cu deposit is located in the Zanjan province and in the northwest corner of Central Iran. Rock units exposed in this area belong to the Cenozoic era (especially Miocene period) and include the Lower Red Formation, Qom Formation, Upper Red Formation and Quaternary deposits. In the study area, ...  Read More