Using whole rock and mineral chemistry for determining the origin of lamprophyres from Deh-Bazargan-Sarasiab 6 (north of erman city, Kerman Province)
In the north of Kerman city, between Deh-Bazargan and Sarasiab 6 villages and along the Koohbanan fault, several lamprophyric dykes have been intruded the Shemshak, Bidu and Hodjedk Formations. The dykes show porphyry and glomeroporphyry textures and contain coarse-grained phenocrysts of olivine (30...
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University of Isfahan
2018-01-01
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| Series: | پترولوژی |
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| Online Access: | http://ijp.ui.ac.ir/article_22391_ff8007fdac095ec40b6fc2dcdce26749.pdf |
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| author | Gholamreza Ghadami Armin Bahrampour Habibe Atapour Mohammad Poosti Hamid Ahmadipour |
| author_facet | Gholamreza Ghadami Armin Bahrampour Habibe Atapour Mohammad Poosti Hamid Ahmadipour |
| author_sort | Gholamreza Ghadami |
| collection | DOAJ |
| description | In the north of Kerman city, between Deh-Bazargan and Sarasiab 6 villages and along the Koohbanan fault, several lamprophyric dykes have been intruded the Shemshak, Bidu and Hodjedk Formations. The dykes show porphyry and glomeroporphyry textures and contain coarse-grained phenocrysts of olivine (30 vol.%), pyroxene (20 vol.%) and amphibole (5 vol.%) crystals in a matrix containing 10 vol.% plagioclase and sanidine microlites, fine-grained pyroxene (20 vol.%) and amphiboles (5 vol.%). Electron microprobe analyses show that the pyroxenes are diopside (Fs7.84-15.11)-)Wo42.20-46.75)-)En41.57-49.24), olivines are chrysolite (Fo85/79-91.20), plagioclases are labradorite (An50.94-66.30) and opaque inclusions in olivines are chrome-spinel (Cr1.3-1.25)-(Fe0.708-0.548)-(Al0.518-0.433). Petrographical evidences such as lack of coarse-grained felsic minerals, the presence of porphyritic texture and the co-existence of coarse-grained pyroxene, olivine and amphibole minerals as well as the similar oxides contents of SiO2 (44.25-46.435 wt.%), MgO (5.81-19.125 wt.%), Na2O (1.55-2.035 wt.%), K2O (1.18-1.715 wt.%) to the average of the well-known alkaline lamprophyres (SiO2=42.5 wt.%, MgO=7.25 wt.%, Na2O=35 wt.%, K2O=25 wt.%), suggest that the studied dykes are similar to the alkaline lamprophyres (monchiquites) rather than calcalkaline spessartites. Thermo-barometric studies of pyroxenes show that the rocks under discussion have been formed under pressure of 5-10 Kb and temperature of 700-900 ºC with less than 10 percent water contents. Whole rock chemical analyses of the studied lamprophyres indicate that the parent magmas were alkaline type and originated from a metasomatized spinel-garnet-lhezrolite mantle source containing hydrous minerals, then they were emplaced in a post-collisional arc setting. |
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| spelling | doaj.art-a744e441ff234452807be9bbc008b96b2023-09-02T13:07:46ZfasUniversity of Isfahanپترولوژی2228-52102322-21822018-01-0183212010.22108/ijp.2018.2239122391Using whole rock and mineral chemistry for determining the origin of lamprophyres from Deh-Bazargan-Sarasiab 6 (north of erman city, Kerman Province)Gholamreza Ghadami0Armin Bahrampour1Habibe Atapour2Mohammad Poosti3Hamid Ahmadipour4Department of Geology, Faculty of Science, University of Hormozgan, Hormozgan, IranDepartment of Geology, Faculty of Science, Shahid Bahonar University, Kerman, IranDepartment of Mining Engineering, Faculty of Engineering, Shahid Bahonar University, Kerman, IranDepartment of Geology, Faculty of Science, University of Hormozgan, Hormozgan, IranDepartment of Geology, Faculty of Science, Shahid Bahonar University, Kerman, IranIn the north of Kerman city, between Deh-Bazargan and Sarasiab 6 villages and along the Koohbanan fault, several lamprophyric dykes have been intruded the Shemshak, Bidu and Hodjedk Formations. The dykes show porphyry and glomeroporphyry textures and contain coarse-grained phenocrysts of olivine (30 vol.%), pyroxene (20 vol.%) and amphibole (5 vol.%) crystals in a matrix containing 10 vol.% plagioclase and sanidine microlites, fine-grained pyroxene (20 vol.%) and amphiboles (5 vol.%). Electron microprobe analyses show that the pyroxenes are diopside (Fs7.84-15.11)-)Wo42.20-46.75)-)En41.57-49.24), olivines are chrysolite (Fo85/79-91.20), plagioclases are labradorite (An50.94-66.30) and opaque inclusions in olivines are chrome-spinel (Cr1.3-1.25)-(Fe0.708-0.548)-(Al0.518-0.433). Petrographical evidences such as lack of coarse-grained felsic minerals, the presence of porphyritic texture and the co-existence of coarse-grained pyroxene, olivine and amphibole minerals as well as the similar oxides contents of SiO2 (44.25-46.435 wt.%), MgO (5.81-19.125 wt.%), Na2O (1.55-2.035 wt.%), K2O (1.18-1.715 wt.%) to the average of the well-known alkaline lamprophyres (SiO2=42.5 wt.%, MgO=7.25 wt.%, Na2O=35 wt.%, K2O=25 wt.%), suggest that the studied dykes are similar to the alkaline lamprophyres (monchiquites) rather than calcalkaline spessartites. Thermo-barometric studies of pyroxenes show that the rocks under discussion have been formed under pressure of 5-10 Kb and temperature of 700-900 ºC with less than 10 percent water contents. Whole rock chemical analyses of the studied lamprophyres indicate that the parent magmas were alkaline type and originated from a metasomatized spinel-garnet-lhezrolite mantle source containing hydrous minerals, then they were emplaced in a post-collisional arc setting.http://ijp.ui.ac.ir/article_22391_ff8007fdac095ec40b6fc2dcdce26749.pdfalkaline lamprophyremonchiquiteDeh-BazarganKermanCenteral Iran |
| spellingShingle | Gholamreza Ghadami Armin Bahrampour Habibe Atapour Mohammad Poosti Hamid Ahmadipour Using whole rock and mineral chemistry for determining the origin of lamprophyres from Deh-Bazargan-Sarasiab 6 (north of erman city, Kerman Province) پترولوژی alkaline lamprophyre monchiquite Deh-Bazargan Kerman Centeral Iran |
| title | Using whole rock and mineral chemistry for determining the origin of lamprophyres from Deh-Bazargan-Sarasiab 6 (north of erman city, Kerman Province) |
| title_full | Using whole rock and mineral chemistry for determining the origin of lamprophyres from Deh-Bazargan-Sarasiab 6 (north of erman city, Kerman Province) |
| title_fullStr | Using whole rock and mineral chemistry for determining the origin of lamprophyres from Deh-Bazargan-Sarasiab 6 (north of erman city, Kerman Province) |
| title_full_unstemmed | Using whole rock and mineral chemistry for determining the origin of lamprophyres from Deh-Bazargan-Sarasiab 6 (north of erman city, Kerman Province) |
| title_short | Using whole rock and mineral chemistry for determining the origin of lamprophyres from Deh-Bazargan-Sarasiab 6 (north of erman city, Kerman Province) |
| title_sort | using whole rock and mineral chemistry for determining the origin of lamprophyres from deh bazargan sarasiab 6 north of erman city kerman province |
| topic | alkaline lamprophyre monchiquite Deh-Bazargan Kerman Centeral Iran |
| url | http://ijp.ui.ac.ir/article_22391_ff8007fdac095ec40b6fc2dcdce26749.pdf |
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