The role of crustal contamination and differentiation in the formation of the Eocene volcanic rocks in Jirande area (Northwest of Qazvin)
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...
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| Format: | Article |
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University of Isfahan
2018-03-01
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| Series: | پترولوژی |
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| Online Access: | http://ijp.ui.ac.ir/article_22503_dba3db4893be08b636f9e8dc7a40745e.pdf |
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| author | Seyede Somayeh Teimouri Habibollah Ghasemi Abbas Asiabanha |
| author_facet | Seyede Somayeh Teimouri Habibollah Ghasemi Abbas Asiabanha |
| author_sort | Seyede Somayeh Teimouri |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T09:14:43Z |
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| id | doaj.art-54e6aa50acff4c4fb7b3eb63fe4dc4e7 |
| institution | Directory Open Access Journal |
| issn | 2228-5210 2322-2182 |
| language | fas |
| last_indexed | 2024-03-12T09:14:43Z |
| publishDate | 2018-03-01 |
| publisher | University of Isfahan |
| record_format | Article |
| series | پترولوژی |
| spelling | doaj.art-54e6aa50acff4c4fb7b3eb63fe4dc4e72023-09-02T14:51:32ZfasUniversity of Isfahanپترولوژی2228-52102322-21822018-03-0191719010.22108/ijp.2017.82007.022503The role of crustal contamination and differentiation in the formation of the Eocene volcanic rocks in Jirande area (Northwest of Qazvin)Seyede Somayeh Teimouri0Habibollah Ghasemi1Abbas Asiabanha2Department of Geology, Faculty of Earth Sciences, Payame Noor University, IranDepartment of Geology, Faculty of Science, Shahrood University of Technology, Shahrood, Iran1 Department of Geology, Faculty of Science, Imam Khomeini International University, Qazvin, IranThe 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.http://ijp.ui.ac.ir/article_22503_dba3db4893be08b636f9e8dc7a40745e.pdfcrustal contaminationmagmatic fractionationEocene volcanic rocksJirande ereaNorthwest of Qazvin |
| spellingShingle | Seyede Somayeh Teimouri Habibollah Ghasemi Abbas Asiabanha The role of crustal contamination and differentiation in the formation of the Eocene volcanic rocks in Jirande area (Northwest of Qazvin) پترولوژی crustal contamination magmatic fractionation Eocene volcanic rocks Jirande erea Northwest of Qazvin |
| title | The role of crustal contamination and differentiation
in the formation of the Eocene volcanic rocks
in Jirande area (Northwest of Qazvin) |
| title_full | The role of crustal contamination and differentiation
in the formation of the Eocene volcanic rocks
in Jirande area (Northwest of Qazvin) |
| title_fullStr | The role of crustal contamination and differentiation
in the formation of the Eocene volcanic rocks
in Jirande area (Northwest of Qazvin) |
| title_full_unstemmed | The role of crustal contamination and differentiation
in the formation of the Eocene volcanic rocks
in Jirande area (Northwest of Qazvin) |
| title_short | The role of crustal contamination and differentiation
in the formation of the Eocene volcanic rocks
in Jirande area (Northwest of Qazvin) |
| title_sort | role of crustal contamination and differentiation in the formation of the eocene volcanic rocks in jirande area northwest of qazvin |
| topic | crustal contamination magmatic fractionation Eocene volcanic rocks Jirande erea Northwest of Qazvin |
| url | http://ijp.ui.ac.ir/article_22503_dba3db4893be08b636f9e8dc7a40745e.pdf |
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