NDLI: Geochemistry and petrogenesis of Ghohroud Igneous Complex (Urumieh–Dokhtar zone): evidence for Neotethyan subduction during the Neogene

Content Provider	Springer Nature Link
Author	Ghasemi, Ali Tabatabaei Manesh, Sayed Mohsen
Copyright Year	2015
Abstract	The Oligo–Miocene Ghohroud granitoid is located in the north of Isfahan, in the Urumieh–Dokhtar magmatic arc (UDMA). The rock composition ranges from granodiorite to tonalite. Rocks mainly include quartz, plagioclase, and alkali feldspar with minor biotite and amphibole. Dacitic and basaltic rocks outcrop as dykes. Geochemical data show that these rocks are subalkaline, calc-alkaline, and metaluminous. Microgranular enclaves, sieve texture, oscillatory zoning in plagioclase, and clear roundness of quartz pieces demonstrated magma mixing. The magma has experienced fractional crystallization that has led to the presence of different petrological units. Large-ion lithophile element (LILE) and Pb enrichment is evidence of crustal contamination. Considering the clear negative anomaly of Nb and Ti, the magma has been formed in a volcanic arc environment. The geochemistry of major and rare earth elements reveals that initial magma has been formed by partial melting of lower crustal protoliths. An underplating magma can supply heat source for the dehydration melting of lower crust and generation of Ghohroud granitic melt by melting of a mafic source during the subduction of the Neotethyan oceanic plate and the Central Iran continental crust.
Starting Page	9599
Ending Page	9623
Page Count	25
File Format	PDF
ISSN	18667511
Journal	Arabian Journal of Geosciences
Volume Number	8
Issue Number	11
e-ISSN	18667538
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-04-15
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geochemistry Petrogenesis Ghohroud Urumieh–Dokhtar magmatic arc belt Iran Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Environmental Science

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