The Central Alborz Permian basaltic magmatism: an evidence of southern passive continental margin of Paleo- Tethys
The study area is located in the Central Alborz (northeast of Baladeh). The Permianmagmatism in this area occurs as a basaltic unit between Ruteh-Nessen Formation.Petrographically, the rocks are plagioclase phyric and geochemically, display alkalinesodic nature. Chondrite- normalized rare earth elem...
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| Format: | Article |
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University of Isfahan
2017-03-01
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| Series: | پترولوژی |
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| Online Access: | http://ijp.ui.ac.ir/article_21500_3516d6dfa7c49ed900e88baced9515dd.pdf |
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| author | Morteza Delavari Farzaneh Rostami Asghar Dolati |
| author_facet | Morteza Delavari Farzaneh Rostami Asghar Dolati |
| author_sort | Morteza Delavari |
| collection | DOAJ |
| description | The study area is located in the Central Alborz (northeast of Baladeh). The Permianmagmatism in this area occurs as a basaltic unit between Ruteh-Nessen Formation.Petrographically, the rocks are plagioclase phyric and geochemically, display alkalinesodic nature. Chondrite- normalized rare earth element (REE) patterns are extremely LREE- enriched similar to those of oceanic island basalts (OIB) with (La/Sm)N,(Sm/Yb)N and (La/Yb)N in the ranges of 1.95- 4.62, 4.23- 5.45 and 8.30- 20.52,respectively. Furthermore, primitive mantle normalized multi element diagramsrepresent OIB characteristics. Modeling based on trace element values and the contentof some major elements reveal low degree partial melting (< 10%) of a deep (~110 km)garnet-bearing mantle source. In addition, variation of some trace element ratios such asNb/Rb, K/La, La/Nb, Ba/Nb, Th/Nb and K/Nb suggests a HIMU mantle origin. As thesamples geochemically show intra-plate tectonomagmatic setting without subductionzone signatures. Thus, during the Permian (and earlier times), Alborz has been as apassive continental margin in the southern border of Paleo-Tethys and its magmatism was more probably affected by extensional tectonism or mantle plume activity related toearlier stages of Neo-Tethys ocean development. |
| first_indexed | 2024-03-12T19:38:28Z |
| format | Article |
| id | doaj.art-8662325400274c81ae984e13ecd5042b |
| institution | Directory Open Access Journal |
| issn | 2228-5210 2322-2182 |
| language | fas |
| last_indexed | 2024-03-12T19:38:28Z |
| publishDate | 2017-03-01 |
| publisher | University of Isfahan |
| record_format | Article |
| series | پترولوژی |
| spelling | doaj.art-8662325400274c81ae984e13ecd5042b2023-08-02T04:02:56ZfasUniversity of Isfahanپترولوژی2228-52102322-21822017-03-01829537410.22108/ijp.2017.2150021500The Central Alborz Permian basaltic magmatism: an evidence of southern passive continental margin of Paleo- TethysMorteza Delavari0Farzaneh Rostami1Asghar Dolati2Department of Geochemistry, Faculty of Earth Sciences, Kharazmi University, Tehran, IranDepartment of Geochemistry, Faculty of Earth Sciences, Kharazmi University, Tehran, IranDepartment of Geochemistry, Faculty of Earth Sciences, Kharazmi University, Tehran, IranThe study area is located in the Central Alborz (northeast of Baladeh). The Permianmagmatism in this area occurs as a basaltic unit between Ruteh-Nessen Formation.Petrographically, the rocks are plagioclase phyric and geochemically, display alkalinesodic nature. Chondrite- normalized rare earth element (REE) patterns are extremely LREE- enriched similar to those of oceanic island basalts (OIB) with (La/Sm)N,(Sm/Yb)N and (La/Yb)N in the ranges of 1.95- 4.62, 4.23- 5.45 and 8.30- 20.52,respectively. Furthermore, primitive mantle normalized multi element diagramsrepresent OIB characteristics. Modeling based on trace element values and the contentof some major elements reveal low degree partial melting (< 10%) of a deep (~110 km)garnet-bearing mantle source. In addition, variation of some trace element ratios such asNb/Rb, K/La, La/Nb, Ba/Nb, Th/Nb and K/Nb suggests a HIMU mantle origin. As thesamples geochemically show intra-plate tectonomagmatic setting without subductionzone signatures. Thus, during the Permian (and earlier times), Alborz has been as apassive continental margin in the southern border of Paleo-Tethys and its magmatism was more probably affected by extensional tectonism or mantle plume activity related toearlier stages of Neo-Tethys ocean development.http://ijp.ui.ac.ir/article_21500_3516d6dfa7c49ed900e88baced9515dd.pdfalkaline basaltintra-platePermianCentral Alborz |
| spellingShingle | Morteza Delavari Farzaneh Rostami Asghar Dolati The Central Alborz Permian basaltic magmatism: an evidence of southern passive continental margin of Paleo- Tethys پترولوژی alkaline basalt intra-plate Permian Central Alborz |
| title | The Central Alborz Permian basaltic magmatism: an evidence of southern passive continental margin of Paleo- Tethys |
| title_full | The Central Alborz Permian basaltic magmatism: an evidence of southern passive continental margin of Paleo- Tethys |
| title_fullStr | The Central Alborz Permian basaltic magmatism: an evidence of southern passive continental margin of Paleo- Tethys |
| title_full_unstemmed | The Central Alborz Permian basaltic magmatism: an evidence of southern passive continental margin of Paleo- Tethys |
| title_short | The Central Alborz Permian basaltic magmatism: an evidence of southern passive continental margin of Paleo- Tethys |
| title_sort | central alborz permian basaltic magmatism an evidence of southern passive continental margin of paleo tethys |
| topic | alkaline basalt intra-plate Permian Central Alborz |
| url | http://ijp.ui.ac.ir/article_21500_3516d6dfa7c49ed900e88baced9515dd.pdf |
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