Petrology of skarns in the north and the southwest of Qazan (South Qamsar) with emphasis on the mineral chemistry of garnet and pyroxene
The Oligo-Miocene Qazan granitoid body caused contact metamorphic of surrounding rocks and skarn formation in the wall limestone. The main intrusive rocks are essentially granite to diorite in composition. Two different types of skarn, exo and endoskarn have been developed. On the base of microprobe...
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University of Isfahan
2018-03-01
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| Series: | پترولوژی |
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| Online Access: | http://ijp.ui.ac.ir/article_22505_1f552a5a53aa8f4acc9cff7713237751.pdf |
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| author | Maria Chavideh Mohsen Tabatabaei Manesh Mohammadali Makizadeh |
| author_facet | Maria Chavideh Mohsen Tabatabaei Manesh Mohammadali Makizadeh |
| author_sort | Maria Chavideh |
| collection | DOAJ |
| description | The Oligo-Miocene Qazan granitoid body caused contact metamorphic of surrounding rocks and skarn formation in the wall limestone. The main intrusive rocks are essentially granite to diorite in composition. Two different types of skarn, exo and endoskarn have been developed. On the base of microprobe data, the northern skarn are characterized by zoning and the amounts of andradite and grossular changes oscillatory. While garnets from the southwestern skarn is predominantly andradite in composition. Using Fe/Ti vs. Al/ (Al+Fe+Mn) diagram that were calculated based on the mole percent of the used elements, it is estimated that about less than 50 percent hydrothermal waters were involved for the northern skarn whereas it was over this amount for the southwestern skarn. This leds to difference in garnet composition. The composition of clinopyroxene in both skarns is the same (diopside). As a result, hydrothermal fluids have not had much influence on pyroxene genesis. With regards to the occurrence of mineral assemblage and the presence of wollastonite in the skarns under study, these rocks have evolved in temperature above 500 ° C and O2 fugacity in the range of 10-17 to 10-15. |
| first_indexed | 2024-03-12T04:30:26Z |
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| id | doaj.art-1b88ea9877cc4d8899e42ea11594b633 |
| institution | Directory Open Access Journal |
| issn | 2228-5210 2322-2182 |
| language | fas |
| last_indexed | 2024-03-12T04:30:26Z |
| publishDate | 2018-03-01 |
| publisher | University of Isfahan |
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| spelling | doaj.art-1b88ea9877cc4d8899e42ea11594b6332023-09-03T10:06:27ZfasUniversity of Isfahanپترولوژی2228-52102322-21822018-03-019111113210.22108/ijp.2017.100423.022505Petrology of skarns in the north and the southwest of Qazan (South Qamsar) with emphasis on the mineral chemistry of garnet and pyroxeneMaria Chavideh0Mohsen Tabatabaei Manesh1Mohammadali Makizadeh2Department of Geology Faculty of Science, University of Isfahan, Isfahan, IranDepartment of Geology, Faculty of Sciences, University of Isfahan, Isfahan, IranDepartment of Geology, Faculty of Sciences, University of Isfahan, Isfahan, IranThe Oligo-Miocene Qazan granitoid body caused contact metamorphic of surrounding rocks and skarn formation in the wall limestone. The main intrusive rocks are essentially granite to diorite in composition. Two different types of skarn, exo and endoskarn have been developed. On the base of microprobe data, the northern skarn are characterized by zoning and the amounts of andradite and grossular changes oscillatory. While garnets from the southwestern skarn is predominantly andradite in composition. Using Fe/Ti vs. Al/ (Al+Fe+Mn) diagram that were calculated based on the mole percent of the used elements, it is estimated that about less than 50 percent hydrothermal waters were involved for the northern skarn whereas it was over this amount for the southwestern skarn. This leds to difference in garnet composition. The composition of clinopyroxene in both skarns is the same (diopside). As a result, hydrothermal fluids have not had much influence on pyroxene genesis. With regards to the occurrence of mineral assemblage and the presence of wollastonite in the skarns under study, these rocks have evolved in temperature above 500 ° C and O2 fugacity in the range of 10-17 to 10-15.http://ijp.ui.ac.ir/article_22505_1f552a5a53aa8f4acc9cff7713237751.pdfGarnetGeochemistrySkarnQazanGranitoidUrumiehdokhtarGhamsar |
| spellingShingle | Maria Chavideh Mohsen Tabatabaei Manesh Mohammadali Makizadeh Petrology of skarns in the north and the southwest of Qazan (South Qamsar) with emphasis on the mineral chemistry of garnet and pyroxene پترولوژی Garnet Geochemistry Skarn Qazan Granitoid Urumiehdokhtar Ghamsar |
| title | Petrology of skarns in the north and the southwest
of Qazan (South Qamsar) with emphasis on the
mineral chemistry of garnet and pyroxene |
| title_full | Petrology of skarns in the north and the southwest
of Qazan (South Qamsar) with emphasis on the
mineral chemistry of garnet and pyroxene |
| title_fullStr | Petrology of skarns in the north and the southwest
of Qazan (South Qamsar) with emphasis on the
mineral chemistry of garnet and pyroxene |
| title_full_unstemmed | Petrology of skarns in the north and the southwest
of Qazan (South Qamsar) with emphasis on the
mineral chemistry of garnet and pyroxene |
| title_short | Petrology of skarns in the north and the southwest
of Qazan (South Qamsar) with emphasis on the
mineral chemistry of garnet and pyroxene |
| title_sort | petrology of skarns in the north and the southwest of qazan south qamsar with emphasis on the mineral chemistry of garnet and pyroxene |
| topic | Garnet Geochemistry Skarn Qazan Granitoid Urumiehdokhtar Ghamsar |
| url | http://ijp.ui.ac.ir/article_22505_1f552a5a53aa8f4acc9cff7713237751.pdf |
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