Determination of P-T and tectonic setting of Ghaleh Yaghmesh plutonic complex (west of Yazd province) by using of mineral chemistry
The Ghaleh Yaghmesh plutonic massif is located the westernmost part of Yazd province and in the central part of the Urumieh – Dokhtar magmatic arc (UDMA). This massif with quartzdiorite, tonalite and granodiorite composition is Oligocene in age and intruded the volcanic and pyroclastic rocks includi...
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University of Isfahan
2017-11-01
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| Series: | پترولوژی |
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| Online Access: | http://ijp.ui.ac.ir/article_22242_44d7384a67a76d22700548a0bfdc8e28.pdf |
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| author | Bahareh Fazeli Mahmoud Khalili Mahin Mansouri Esfahani |
| author_facet | Bahareh Fazeli Mahmoud Khalili Mahin Mansouri Esfahani |
| author_sort | Bahareh Fazeli |
| collection | DOAJ |
| description | The Ghaleh Yaghmesh plutonic massif is located the westernmost part of Yazd province and in the central part of the Urumieh – Dokhtar magmatic arc (UDMA). This massif with quartzdiorite, tonalite and granodiorite composition is Oligocene in age and intruded the volcanic and pyroclastic rocks including rhyolite, rhyodacite, and andesitic, as well as rhyodacitic and rhyolitic tuff belonging to the Eocene. Tonalite and granodiorite contain mafic microgranular enclaves with quartzdiorite composition. According to mineral chemistry, the plagioclases are oligoclase to labradorite in composition. The amphiboles have high magnesian and are calcic nature (magnesio-hornblende). The biotites from the tonalites are enriched in magnesian. Compositionally, clinopyroxene display augite and augite–diopside in quartz-diorite and enclaves respectively. Thermometery of the clinopyroxene and hornblende– plagioclase show 1100-1125°C and 730-900°C respectively. The pressure of the studied rocks, on the base of chemical data of magnesio-hornblende, ranges from 1.5 to 1.75 kbar, which is equal to the depth of about 5.5-6.5 km. The overall field, petrography and mineral chemistry data support the I-type calc-alkaline nature of the studied granitoid, which formed during high oxygen fugacity and volcanic arc, and subduction is suggested for its formation environment. |
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| id | doaj.art-6291fcdb7432403795afcd888b6c0262 |
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| issn | 2228-5210 2322-2182 |
| language | fas |
| last_indexed | 2024-03-12T20:04:45Z |
| publishDate | 2017-11-01 |
| publisher | University of Isfahan |
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| series | پترولوژی |
| spelling | doaj.art-6291fcdb7432403795afcd888b6c02622023-08-02T02:10:17ZfasUniversity of Isfahanپترولوژی2228-52102322-21822017-11-01831436610.22108/ijp.2017.81993.022242Determination of P-T and tectonic setting of Ghaleh Yaghmesh plutonic complex (west of Yazd province) by using of mineral chemistryBahareh Fazeli0Mahmoud Khalili1Mahin Mansouri Esfahani2Department of Geology, University of Isfahan, Isfahan, IranDepartment of Geology, University of Isfahan, Isfahan, IranDepartment of Mining Engineering, Isfahan University of Technology , Isfahan, IranThe Ghaleh Yaghmesh plutonic massif is located the westernmost part of Yazd province and in the central part of the Urumieh – Dokhtar magmatic arc (UDMA). This massif with quartzdiorite, tonalite and granodiorite composition is Oligocene in age and intruded the volcanic and pyroclastic rocks including rhyolite, rhyodacite, and andesitic, as well as rhyodacitic and rhyolitic tuff belonging to the Eocene. Tonalite and granodiorite contain mafic microgranular enclaves with quartzdiorite composition. According to mineral chemistry, the plagioclases are oligoclase to labradorite in composition. The amphiboles have high magnesian and are calcic nature (magnesio-hornblende). The biotites from the tonalites are enriched in magnesian. Compositionally, clinopyroxene display augite and augite–diopside in quartz-diorite and enclaves respectively. Thermometery of the clinopyroxene and hornblende– plagioclase show 1100-1125°C and 730-900°C respectively. The pressure of the studied rocks, on the base of chemical data of magnesio-hornblende, ranges from 1.5 to 1.75 kbar, which is equal to the depth of about 5.5-6.5 km. The overall field, petrography and mineral chemistry data support the I-type calc-alkaline nature of the studied granitoid, which formed during high oxygen fugacity and volcanic arc, and subduction is suggested for its formation environment.http://ijp.ui.ac.ir/article_22242_44d7384a67a76d22700548a0bfdc8e28.pdfmineral chemistrythermobarometryI-type granitoidGhaleh YaghmeshUrumieh-Dokhtar |
| spellingShingle | Bahareh Fazeli Mahmoud Khalili Mahin Mansouri Esfahani Determination of P-T and tectonic setting of Ghaleh Yaghmesh plutonic complex (west of Yazd province) by using of mineral chemistry پترولوژی mineral chemistry thermobarometry I-type granitoid Ghaleh Yaghmesh Urumieh-Dokhtar |
| title | Determination of P-T and tectonic setting of
Ghaleh Yaghmesh plutonic complex (west of Yazd province)
by using of mineral chemistry |
| title_full | Determination of P-T and tectonic setting of
Ghaleh Yaghmesh plutonic complex (west of Yazd province)
by using of mineral chemistry |
| title_fullStr | Determination of P-T and tectonic setting of
Ghaleh Yaghmesh plutonic complex (west of Yazd province)
by using of mineral chemistry |
| title_full_unstemmed | Determination of P-T and tectonic setting of
Ghaleh Yaghmesh plutonic complex (west of Yazd province)
by using of mineral chemistry |
| title_short | Determination of P-T and tectonic setting of
Ghaleh Yaghmesh plutonic complex (west of Yazd province)
by using of mineral chemistry |
| title_sort | determination of p t and tectonic setting of ghaleh yaghmesh plutonic complex west of yazd province by using of mineral chemistry |
| topic | mineral chemistry thermobarometry I-type granitoid Ghaleh Yaghmesh Urumieh-Dokhtar |
| url | http://ijp.ui.ac.ir/article_22242_44d7384a67a76d22700548a0bfdc8e28.pdf |
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