Geochemistry and Petrogenesis of the Degamankesh Gabbroic Bodies (SW of Astara city)
In the northern ranges of Guilan in Degarmankesh, alkali gabbroic bodies have been outcropped. Based on petrographic studies, the essential minerals are plagioclase, pyroxene and± Olivine. Chlorite, termolite-actinolite, serpentine, sosorite are secondary and opaque is accessory mineral of the rocks...
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University of Isfahan
2016-09-01
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| Series: | پترولوژی |
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| Online Access: | http://ijp.ui.ac.ir/article_21018_9164c0c218c8066dc06b09b9e4d805ba.pdf |
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| author | Mojgan Salavati Aghil Ashori |
| author_facet | Mojgan Salavati Aghil Ashori |
| author_sort | Mojgan Salavati |
| collection | DOAJ |
| description | In the northern ranges of Guilan in Degarmankesh, alkali gabbroic bodies have been outcropped. Based on petrographic studies, the essential minerals are plagioclase, pyroxene and± Olivine. Chlorite, termolite-actinolite, serpentine, sosorite are secondary and opaque is accessory mineral of the rocks studied. Based on geochemistry data, the rocks studied are plotted on gabbro domain. Normalized trace element patterns relative to MORB and primitive mantle show LREE enriched and HREE depleted. K, Th, Rb positive anomaly as well as negative anomaly of Ta, Nb and Ti point to continental crust contaminated by the rocks under discussion. In terms of tectonic setting, the studied rocks lie in continental intraplate and continental arc environment. The parent magma generated by 5% to 14% partial melting of garnet lehrzolite mantle source possibly at the depth of approximately 80 km. The overall petrographic and geochemical criteria indicate that the studied gabrros originated from magmatism related to Paleogene pull apart basin, in the course of partial melting of asthenosphere arisen under continental lithosphere and contaminated with derived subducted fluids in supraduction zone. |
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| id | doaj.art-6364bff8b84042eda0adc4f7e90fa6b2 |
| institution | Directory Open Access Journal |
| issn | 2228-5210 2322-2182 |
| language | fas |
| last_indexed | 2024-03-12T09:42:03Z |
| publishDate | 2016-09-01 |
| publisher | University of Isfahan |
| record_format | Article |
| series | پترولوژی |
| spelling | doaj.art-6364bff8b84042eda0adc4f7e90fa6b22023-09-02T13:07:46ZfasUniversity of Isfahanپترولوژی2228-52102322-21822016-09-01727618221018Geochemistry and Petrogenesis of the Degamankesh Gabbroic Bodies (SW of Astara city)Mojgan Salavati0Aghil Ashori1Department of Geology, Faculty of Sciences, Islamic Azad University, Lahijan Branch, Lahijan, IranDepartment of Geology, Faculty of Sciences, Islamic Azad University, Lahijan Branch, Lahijan, IranIn the northern ranges of Guilan in Degarmankesh, alkali gabbroic bodies have been outcropped. Based on petrographic studies, the essential minerals are plagioclase, pyroxene and± Olivine. Chlorite, termolite-actinolite, serpentine, sosorite are secondary and opaque is accessory mineral of the rocks studied. Based on geochemistry data, the rocks studied are plotted on gabbro domain. Normalized trace element patterns relative to MORB and primitive mantle show LREE enriched and HREE depleted. K, Th, Rb positive anomaly as well as negative anomaly of Ta, Nb and Ti point to continental crust contaminated by the rocks under discussion. In terms of tectonic setting, the studied rocks lie in continental intraplate and continental arc environment. The parent magma generated by 5% to 14% partial melting of garnet lehrzolite mantle source possibly at the depth of approximately 80 km. The overall petrographic and geochemical criteria indicate that the studied gabrros originated from magmatism related to Paleogene pull apart basin, in the course of partial melting of asthenosphere arisen under continental lithosphere and contaminated with derived subducted fluids in supraduction zone.http://ijp.ui.ac.ir/article_21018_9164c0c218c8066dc06b09b9e4d805ba.pdfGabbroAlkaline seriesAstara cityTalesh zone |
| spellingShingle | Mojgan Salavati Aghil Ashori Geochemistry and Petrogenesis of the Degamankesh Gabbroic Bodies (SW of Astara city) پترولوژی Gabbro Alkaline series Astara city Talesh zone |
| title | Geochemistry and Petrogenesis of the Degamankesh Gabbroic Bodies (SW of Astara city) |
| title_full | Geochemistry and Petrogenesis of the Degamankesh Gabbroic Bodies (SW of Astara city) |
| title_fullStr | Geochemistry and Petrogenesis of the Degamankesh Gabbroic Bodies (SW of Astara city) |
| title_full_unstemmed | Geochemistry and Petrogenesis of the Degamankesh Gabbroic Bodies (SW of Astara city) |
| title_short | Geochemistry and Petrogenesis of the Degamankesh Gabbroic Bodies (SW of Astara city) |
| title_sort | geochemistry and petrogenesis of the degamankesh gabbroic bodies sw of astara city |
| topic | Gabbro Alkaline series Astara city Talesh zone |
| url | http://ijp.ui.ac.ir/article_21018_9164c0c218c8066dc06b09b9e4d805ba.pdf |
| work_keys_str_mv | AT mojgansalavati geochemistryandpetrogenesisofthedegamankeshgabbroicbodiesswofastaracity AT aghilashori geochemistryandpetrogenesisofthedegamankeshgabbroicbodiesswofastaracity |