HETEROGENEOUS GARNETS IN THE ALKALINE FELDSPATHOID-BEARING ROCKS FROM THE KALEYBAR PLUTON, NORTHERN AZERBAIJAN (NW IRAN)

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HAJI ALI OUGHLI R.; MOAZEN MOHSEN

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Journal Paper

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Journal: Iranian Journal of Crystallography and Mineralogy Year:2009 | Volume:17 | Issue:2 Page(s): 203-212

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Information Journal Paper

Title

HETEROGENEOUS GARNETS IN THE ALKALINE FELDSPATHOID-BEARING ROCKS FROM THE KALEYBAR PLUTON, NORTHERN AZERBAIJAN (NW IRAN)

Author(s)

HAJI ALI OUGHLI R. | MOAZEN MOHSEN | Issue Writer Certificate

Keywords

ALKALINE FELDSPATHOID-BEARING ROCKSQ3

TI-GARNETQ3

GARNET AND CLINOPYROXENE MINERAL CHEMISTRYQ3

KALEYBAR INTRUSIONQ3

NW IRANQ2

Abstract

The KALEYBAR INTRUSION with an area of 750km2 is located in the north east Azerbaijan, NW IRAN. Based on structural subdivisions of Iran, it is located in the West Alborz-Azerbaijan Zone which is intruded into the Azerbaijan continental crust during Eocene to Oligocene following the Pyrenean Orogeny. It consists of various rock types including nephelinesyenite, syenite, nephelinediorite together with minor diorite and microgranite. The rock forming minerals of the investigated nepheline syenites are plagioclase, orthoclase, nepheline, biotite and amphibole. Clinopyroxene, plagioclase, amphibole and nepheline are dominant minerals in nepheline diorite. Titanian garnet is uncommon accessory phase of the both rock types. Chemically, garnet from the nepheline syenite has TiO2 contents ranging from 1wt% to 5.0 wt%. Its compositions consistent with Ti-Adr67 to 78 mole% Grs 21 to 33 mole%. TI-GARNET from the nepheline syenite is euhedral to subhedral with reddish to deep brown colours which is different from light brown anhedral and fine grain garnet from the nepheline diorite. Magmatic origin of the TI-GARNET from nepheline syenite is suggested on the basis of petrographic studies, mineralogical criteria and chemical properties whereas the secondary garnet in the nepheline diorite seems to originate from metasomatic source.

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References

PARTIAL MELTING OF PELITES AND SEMI-PELITES IN THE KALAYBAR THERMAL AUREOLE, NW IRAN

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APA: Copy

HAJI ALI OUGHLI, R., & MOAZEN, MOHSEN. (2009). HETEROGENEOUS GARNETS IN THE ALKALINE FELDSPATHOID-BEARING ROCKS FROM THE KALEYBAR PLUTON, NORTHERN AZERBAIJAN (NW IRAN). IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 17(2), 203-212. SID. https://sid.ir/paper/4270/en

Vancouver: Copy

HAJI ALI OUGHLI R., MOAZEN MOHSEN. HETEROGENEOUS GARNETS IN THE ALKALINE FELDSPATHOID-BEARING ROCKS FROM THE KALEYBAR PLUTON, NORTHERN AZERBAIJAN (NW IRAN). IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2009;17(2):203-212. Available from: https://sid.ir/paper/4270/en

IEEE: Copy

R. HAJI ALI OUGHLI, and MOHSEN MOAZEN, “HETEROGENEOUS GARNETS IN THE ALKALINE FELDSPATHOID-BEARING ROCKS FROM THE KALEYBAR PLUTON, NORTHERN AZERBAIJAN (NW IRAN),” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 17, no. 2, pp. 203–212, 2009, [Online]. Available: https://sid.ir/paper/4270/en

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