Date of Award
7-13-2009
Degree Type
Thesis
Degree Name
Master of Science (MS)
Department
Geosciences
First Advisor
Hassan A. Babaie - Chair
Second Advisor
Eirik J. Krogstad
Third Advisor
Morteza Khalatbari- Jafari
Fourth Advisor
Timothy E. La Tour
Abstract
Composition and texture of the Middle and Late Eocene volcanic, volcaniclastic, and volcanic-sedimentary rocks in the Bijgerd-Kuh e Kharchin area, in the Uromieh-Dokhtar zone northwest of Saveh, Iran, suggest the complexity of the magmatic system that involved multiple eruptions from one or more sources. Hydrated volcanic fragments in hyaloclastic rocks, and the presence of a sequence of shallow and intermediate-depth marine microfossils, suggest that the Middle Eocene units were erupted in a marine basin. The bimodal volcanism of the Late Eocene is distinguished by the presence of four alternating sequences of hyaloclastite lava and ignimbrite. The REE patterns show spatial homogeneity and temporal heterogeneity in the composition of all the Late Eocene sequences, suggesting origination of magma from varying sources that erupted at different times. The trace element distributions of the hyaloclastites and ignimbrites are compatible with those evolved through fractional crystallization of the lower and upper continental crust, respectively.
DOI
https://doi.org/10.57709/1059604
Recommended Citation
Davarpanah, Armita, "Magmatic Evolution of the Eocene Volcanic Rocks of the Bijgerd Kuh E Kharchin Area, Uromieh-Dokhtar Zone, Iran." Thesis, Georgia State University, 2009.
doi: https://doi.org/10.57709/1059604