THE ROLE OF CRUSTAL CONTAMINATION AND DIFFERENTIATION IN THE FORMATION OF THE EOCENE VOLCANIC ROCKS IN JIRANDE AREA (NORTHWEST OF QAZVIN)

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TEIMOURI SEYEDEH SOMAYEH; GHASEMI HABIBOLLAH; ASIABANHA ABBAS

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Journal: PETROLOGY Year:2018 | Volume:9 | Issue:33 Page(s): 71-90

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Title

THE ROLE OF CRUSTAL CONTAMINATION AND DIFFERENTIATION IN THE FORMATION OF THE EOCENE VOLCANIC ROCKS IN JIRANDE AREA (NORTHWEST OF QAZVIN)

Author(s)

TEIMOURI SEYEDEH SOMAYEH | GHASEMI HABIBOLLAH | ASIABANHA ABBAS | Issue Writer Certificate

Keywords

CRUSTAL CONTAMINATIONQ2

DIFFERENTIATIONQ1

EOCENE VOLCANIC ROCKSQ2

JIRANDE AREAQ1

NORTHWEST OF QAZVINQ1

Abstract

The EOCENE VOLCANIC ROCKS in JIRANDE AREA are dominated by basalt, andesite, trachyt and trachyandesite, which range from basic to intermediate rocks. Plagioclase as major mineral in igneous rocks makes up the largest percentage mineral in these rocks. Clinopyroxene and olivine in basaltic rocks and amphibole in acidic rocks are the prevalent minerals. In petrological studies, the existence of glomeroporphyry, sieve, corrosion gulf, skeletal, and also reaction rims confirm the role of CRUSTAL CONTAMINATION and fractional crystallization in the evolution of the study rocks. Also, variation diagrams of trace elements, spider diagrams together with AFC modeling and ratio-ratio diagrams of trace elements, highlights the role of CRUSTAL CONTAMINATION and magmatic fractionation in the genesis of the rocks studied. The parent magma of these rocks, have a composition like as the melts derived from enriched mantle, and plots in the field of 10-20 percent partial melting of a garnet-spinel lherzolitic source in the depth of 90 to 110 km.

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APA: Copy

TEIMOURI, SEYEDEH SOMAYEH, GHASEMI, HABIBOLLAH, & ASIABANHA, ABBAS. (2018). THE ROLE OF CRUSTAL CONTAMINATION AND DIFFERENTIATION IN THE FORMATION OF THE EOCENE VOLCANIC ROCKS IN JIRANDE AREA (NORTHWEST OF QAZVIN). PETROLOGY, 9(33 ), 71-90. SID. https://sid.ir/paper/196959/en

Vancouver: Copy

TEIMOURI SEYEDEH SOMAYEH, GHASEMI HABIBOLLAH, ASIABANHA ABBAS. THE ROLE OF CRUSTAL CONTAMINATION AND DIFFERENTIATION IN THE FORMATION OF THE EOCENE VOLCANIC ROCKS IN JIRANDE AREA (NORTHWEST OF QAZVIN). PETROLOGY[Internet]. 2018;9(33 ):71-90. Available from: https://sid.ir/paper/196959/en

IEEE: Copy

SEYEDEH SOMAYEH TEIMOURI, HABIBOLLAH GHASEMI, and ABBAS ASIABANHA, “THE ROLE OF CRUSTAL CONTAMINATION AND DIFFERENTIATION IN THE FORMATION OF THE EOCENE VOLCANIC ROCKS IN JIRANDE AREA (NORTHWEST OF QAZVIN),” PETROLOGY, vol. 9, no. 33 , pp. 71–90, 2018, [Online]. Available: https://sid.ir/paper/196959/en

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