Petrogenesis of Cenozoic volcanic rocks in Kaleybar, western Alborz: Constraints from petrology, whole‐rock geochemistry and isotop geochemistry

Articles in Press

Document Type : Research

Authors

Department of Geology, Payame Noor University, Tehran, Iran

10.22128/ijcm.2025.2956.0

Abstract

Cenozoic volcanic rocks of Kaleybar include basalt, basaltic andesite, trachybasalt, trachyandesite, and tephrite, which are classified as High Nb intermediate to mafic, intermediate to high-K calc-alkaline, and shoshonitic rocks. These rocks with subduction related trace element pattern are enriched in the LILEs, and the LREEs; (La/Lu)N= 7.7–40.6), and show depletion in P, HREEs and HFSEs (e.g., Nb, Ta, and Ti) and their patterns are most similar to OIB. These rocks formed during extensional setting resulted by slab roll back during subduction (middle Eiocene-late Oligocene) and deep subduction or syn-collision slab-breakoff (late Oligocene-early Miocene) of the Arabian and the Iranian Plateaus respectively.

Keywords

Iranian Journal of Crystallography and Mineralogy

Articles in Press, Accepted Manuscript
Available Online from 28 September 2025

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History

  • Receive Date: 05 January 2025
  • Revise Date: 16 September 2025
  • Accept Date: 28 September 2025

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