PETROLOGY AND PETRO GENESIS OF ALKALINE AND CALC-ALKALINE LAMPROPHYRES IN THE NW IRAN

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AGHAZADEH M.; BADRZADEH Z.

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Journal: GEOSCIENCES Year:2015 | Volume:24 | Issue:94 (PETROLOGY & MINERALOGY) Page(s): 87-102

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Information Journal Paper

Title

PETROLOGY AND PETRO GENESIS OF ALKALINE AND CALC-ALKALINE LAMPROPHYRES IN THE NW IRAN

Author(s)

AGHAZADEH M. | BADRZADEH Z. | Issue Writer Certificate

Keywords

LAMPROPHYREQ2

ALKALINEQ2

CALC-ALKALINEQ2

PETRO GENESISQ1

IRANQ2

Abstract

In the northwestern IRAN mica-and amphibole-rich LAMPROPHYREs crop out mainly as dyke and they cut Pre-Pliocene strata. They exposed in the Arasbaran, Eslamy Peninsula, and Mishu range. According to the mineralogy and mineral chemistry, amphibole-rich LAMPROPHYREs have kaersutite type amphiboles and diopside phenocrysts in the matrix of same mafic minerals, feldspars, and altered glass. These LAMPROPHYREs in some thin sections have olivine and phlogopite. Mica-rich LAMPROPHYREs include phlogopite and diopside phenocrysts in the matrix of same mafic minerals, abundant glass and secondary minerals. According to the mineralogy, mineral chemistry, and geochemistry, amphibole rich LAMPROPHYREs are ALKALINE and show camptonite-sannaite composition but mica-rich lamrophyres are CALC-ALKALINE and represent minette composition. ALKALINE LAMPROPHYREs represent characteristics of OIB type magma while CALC-ALKALINE LAMPROPHYREs show characteristics of magmas originated in the subduction dominant tectonic setting. Sorkheh amphibole-bearing LAMPROPHYREs show both ALKALINE and CALC-ALKALINE type LAMPROPHYREs. Regarding to geochemical features both CALC-ALKALINE and ALKALINE LAMPROPHYREs originated from heterogeneous mantle with different proportions of spinel, garnet and hydrous minerals (e.g. phlogopite and amphibole). CALC-ALKALINE LAMPROPHYREs originated from a mantle enriched in phlogopite and ALKALINE LAMPROPHYREs originated from lithospheric mantle that metasomatised by deep mantle and enriched in amphibole. Both mentioned mantles associated in the petrogenesis of the Sorkheh amphibole- bearing LAMPROPHYREs. The LAMPROPHYREs were emplaced in the post collisional tectonic setting.

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APA: Copy

AGHAZADEH, M., & BADRZADEH, Z.. (2015). PETROLOGY AND PETRO GENESIS OF ALKALINE AND CALC-ALKALINE LAMPROPHYRES IN THE NW IRAN. GEOSCIENCES, 24(94 (PETROLOGY & MINERALOGY)), 87-102. SID. https://sid.ir/paper/31364/en

Vancouver: Copy

AGHAZADEH M., BADRZADEH Z.. PETROLOGY AND PETRO GENESIS OF ALKALINE AND CALC-ALKALINE LAMPROPHYRES IN THE NW IRAN. GEOSCIENCES[Internet]. 2015;24(94 (PETROLOGY & MINERALOGY)):87-102. Available from: https://sid.ir/paper/31364/en

IEEE: Copy

M. AGHAZADEH, and Z. BADRZADEH, “PETROLOGY AND PETRO GENESIS OF ALKALINE AND CALC-ALKALINE LAMPROPHYRES IN THE NW IRAN,” GEOSCIENCES, vol. 24, no. 94 (PETROLOGY & MINERALOGY), pp. 87–102, 2015, [Online]. Available: https://sid.ir/paper/31364/en

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