Petrogenesis of Quaternary Shoshonitic Volcanism in NE Iran (Ardabil) : Implication for Postcollisional Magmatism
Author
Source
Journal of Geological Research
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-12-07
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Earth Science , Water and Environment
Abstract EN
Trachyandesites, trachytes, andesites, and pyrocalstic rocks, with shoshonitic signature, are the main Quaternary volcanic rocks in the Sabalan region (Ardabil).
Plagiocalse, K-feldspar, biotite associated with clinopyroxene, and glass are the main constituents of these lavas.
Plagioclases are andesine to labradorite while clinopyroxenes have augitic composition.
The Sabalan volcanic rocks show enrichment in LREEs (relative to HREEs) and are characterized by enrichment in LILEs and depletion in HFSEs.
Petrological observations, along with rare earth and trace elements geochemistry, suggest shoshonitic signature for Sabalan lavas.
This signature highlights derivation from a subduction-related source.
The Sabalan volcanic rocks are isotopically characterized by derivation from an enriched mantle source with a tendency to plot in the fields defined by island-arc basalts (IAB) and OIBs (in εNd versus 87Sr/86Sr diagram).
The geochemical and isotopic characteristics of the Sabalan lavas suggest that their magma has been issued via low degree partial melting of a subduction-metasomatized continental lithospheric mantle.
The formation of these lavas is related to slab steepening and breakoff in a postcollisional regime.
American Psychological Association (APA)
Shahbazi Shiran, Habib. 2013. Petrogenesis of Quaternary Shoshonitic Volcanism in NE Iran (Ardabil) : Implication for Postcollisional Magmatism. Journal of Geological Research،Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-494510
Modern Language Association (MLA)
Shahbazi Shiran, Habib. Petrogenesis of Quaternary Shoshonitic Volcanism in NE Iran (Ardabil) : Implication for Postcollisional Magmatism. Journal of Geological Research No. 2013 (2013), pp.1-11.
https://search.emarefa.net/detail/BIM-494510
American Medical Association (AMA)
Shahbazi Shiran, Habib. Petrogenesis of Quaternary Shoshonitic Volcanism in NE Iran (Ardabil) : Implication for Postcollisional Magmatism. Journal of Geological Research. 2013. Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-494510
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-494510