Petrology and geochemistry of some granitoid and intermediate rocks in southwest of the Qorveh area (Kurdistan)
In the southwest of the Qorveh area, north of the Sanandaj-Sirjan zone, there are outcrops of acidic and intermediate rocks including monzogranite, granodiorite, tonalite and diorite. According to petrographical studies, plagioclase, alkali-feldspar, quartz, amphibole, clinopyroxene and biotite. Geo...
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doaj-da848fead9c949b2acf697a00f3a86422020-11-24T20:55:09ZfasUniversity of IsfahanPetrology2228-52102322-21822018-03-0191214410.22108/ijp.2018.100707.100022502Petrology and geochemistry of some granitoid and intermediate rocks in southwest of the Qorveh area (Kurdistan)Farhad Aliani0Mohammad Maanijou1Zahra Sabouri2Mirmohammad Miri3خیابان شهید فهمیده- دانشگاه بوعلی سیناGeology department, Faculty of sciences, Bu-Ali-Sina University, Hamedan,Geology department, Faculty of sciences, Bu-Ali-Sina University, HamedanGeology department, Faculty of sciences, Bu-Ali-Sina University, HamedanIn the southwest of the Qorveh area, north of the Sanandaj-Sirjan zone, there are outcrops of acidic and intermediate rocks including monzogranite, granodiorite, tonalite and diorite. According to petrographical studies, plagioclase, alkali-feldspar, quartz, amphibole, clinopyroxene and biotite. Geochemical and mineralogical studies indicate that these rocks are metaluminous to some peraluminous, belonging to calc-alkaline magma series and having I-type characteristics. The REE normalized chondrite pattern of the samples show the M-type tetrad effect and relatively negative Eu anomalies. All of petrography and geochemistry data show fractionation crystallization REE-enriched minerals e.g. feldspar, amphibole, apatite and titanite followed by magma-fluids reaction in late crystallization phenomena are the most important factors for the formation of tetrad effect in these rocks. Lanthanides tetrad effects are recognizable in REE patterns of the samples and they change versus Y/Ho, K/Rb, Zr/Hf, Sr/Eu and Eu/Eu* ratios in accordance with evolution trend of granitoid. These rocks are enriched in LILE (i.e. U, Rb, K, Th) and LREE and show some depletion in Nb, Hf, Ti, Ta, Ba, Zr and P. LILE and LREE enrichment and HSFE depletion of the samples are indication of their formation in subduction zonehttp://ijp.ui.ac.ir/article_22502_777e1f0c1d190eb144da43f7aa3c6feb.pdfPetrologyGeochemistryQorveh areaSanandaj-Sirjan zone |
collection |
DOAJ |
language |
fas |
format |
Article |
sources |
DOAJ |
author |
Farhad Aliani Mohammad Maanijou Zahra Sabouri Mirmohammad Miri |
spellingShingle |
Farhad Aliani Mohammad Maanijou Zahra Sabouri Mirmohammad Miri Petrology and geochemistry of some granitoid and intermediate rocks in southwest of the Qorveh area (Kurdistan) Petrology Petrology Geochemistry Qorveh area Sanandaj-Sirjan zone |
author_facet |
Farhad Aliani Mohammad Maanijou Zahra Sabouri Mirmohammad Miri |
author_sort |
Farhad Aliani |
title |
Petrology and geochemistry of some granitoid
and intermediate rocks in southwest
of the Qorveh area (Kurdistan) |
title_short |
Petrology and geochemistry of some granitoid
and intermediate rocks in southwest
of the Qorveh area (Kurdistan) |
title_full |
Petrology and geochemistry of some granitoid
and intermediate rocks in southwest
of the Qorveh area (Kurdistan) |
title_fullStr |
Petrology and geochemistry of some granitoid
and intermediate rocks in southwest
of the Qorveh area (Kurdistan) |
title_full_unstemmed |
Petrology and geochemistry of some granitoid
and intermediate rocks in southwest
of the Qorveh area (Kurdistan) |
title_sort |
petrology and geochemistry of some granitoid
and intermediate rocks in southwest
of the qorveh area (kurdistan) |
publisher |
University of Isfahan |
series |
Petrology |
issn |
2228-5210 2322-2182 |
publishDate |
2018-03-01 |
description |
In the southwest of the Qorveh area, north of the Sanandaj-Sirjan zone, there are outcrops of acidic and intermediate rocks including monzogranite, granodiorite, tonalite and diorite. According to petrographical studies, plagioclase, alkali-feldspar, quartz, amphibole, clinopyroxene and biotite. Geochemical and mineralogical studies indicate that these rocks are metaluminous to some peraluminous, belonging to calc-alkaline magma series and having I-type characteristics. The REE normalized chondrite pattern of the samples show the M-type tetrad effect and relatively negative Eu anomalies. All of petrography and geochemistry data show fractionation crystallization REE-enriched minerals e.g. feldspar, amphibole, apatite and titanite followed by magma-fluids reaction in late crystallization phenomena are the most important factors for the formation of tetrad effect in these rocks. Lanthanides tetrad effects are recognizable in REE patterns of the samples and they change versus Y/Ho, K/Rb, Zr/Hf, Sr/Eu and Eu/Eu* ratios in accordance with evolution trend of granitoid. These rocks are enriched in LILE (i.e. U, Rb, K, Th) and LREE and show some depletion in Nb, Hf, Ti, Ta, Ba, Zr and P. LILE and LREE enrichment and HSFE depletion of the samples are indication of their formation in subduction zone |
topic |
Petrology Geochemistry Qorveh area Sanandaj-Sirjan zone |
url |
http://ijp.ui.ac.ir/article_22502_777e1f0c1d190eb144da43f7aa3c6feb.pdf |
work_keys_str_mv |
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