Occurrence of Prehnite, Pumpellyite and Garnet in Biotite from Granitic Rocks of the Canadian Appalachians: A Mineral Chemistry Study Using Electron Microprobe
A particular feature of biotite grains from some of the Canadian Appalachian granitic rocks is the presence of lenses of Ca-Al silicates developed along cleavage planes. These from the more to less common are prehnite, pumpellyite and grandite garnet, an intermediate composition between andradite an...
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University of Tehran
2011-06-01
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| Series: | Journal of Sciences, Islamic Republic of Iran |
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| Online Access: | https://jsciences.ut.ac.ir/article_23037_9e2b56d78b1773b1c3d8b3cb42cee211.pdf |
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| author | A.A. T. Shabani |
| author_facet | A.A. T. Shabani |
| author_sort | A.A. T. Shabani |
| collection | DOAJ |
| description | A particular feature of biotite grains from some of the Canadian Appalachian granitic rocks is the presence of lenses of Ca-Al silicates developed along cleavage planes. These from the more to less common are prehnite, pumpellyite and grandite garnet, an intermediate composition between andradite and grossular. Rarely all three minerals can be observed together in one single biotite grain. Microprobe analyses show that Al2O3 contents of prehnite vary from 17.52 to 24.55 and Fe2O3 from 2.38 to 8.88 wt. %, which can be reflected in a substantial and variable substitution of Fe for Al. Furthermore, a fairly positive correlation of MnO values of both prehnite and host biotite may indicate the role of biotite replacement by prehnite. Fe2O3 content in nine analyzed pumpellyite samples varies between 10 and 23 wt%. Fe2O3 contents of more than 10 wt% in pumpellyite are indicative of zeolite and prehnite-pumpellyite facies conditions. |
| format | Article |
| id | doaj-art-bc8a27f2b40e40369b6014833689af70 |
| institution | DOAJ |
| issn | 1016-1104 2345-6914 |
| language | English |
| publishDate | 2011-06-01 |
| publisher | University of Tehran |
| record_format | Article |
| series | Journal of Sciences, Islamic Republic of Iran |
| spelling | doaj-art-bc8a27f2b40e40369b6014833689af702025-08-20T03:13:36ZengUniversity of TehranJournal of Sciences, Islamic Republic of Iran1016-11042345-69142011-06-0122213514223037Occurrence of Prehnite, Pumpellyite and Garnet in Biotite from Granitic Rocks of the Canadian Appalachians: A Mineral Chemistry Study Using Electron MicroprobeA.A. T. Shabani0Research Center for Earth Sciences, Geological Survey of IranA particular feature of biotite grains from some of the Canadian Appalachian granitic rocks is the presence of lenses of Ca-Al silicates developed along cleavage planes. These from the more to less common are prehnite, pumpellyite and grandite garnet, an intermediate composition between andradite and grossular. Rarely all three minerals can be observed together in one single biotite grain. Microprobe analyses show that Al2O3 contents of prehnite vary from 17.52 to 24.55 and Fe2O3 from 2.38 to 8.88 wt. %, which can be reflected in a substantial and variable substitution of Fe for Al. Furthermore, a fairly positive correlation of MnO values of both prehnite and host biotite may indicate the role of biotite replacement by prehnite. Fe2O3 content in nine analyzed pumpellyite samples varies between 10 and 23 wt%. Fe2O3 contents of more than 10 wt% in pumpellyite are indicative of zeolite and prehnite-pumpellyite facies conditions.https://jsciences.ut.ac.ir/article_23037_9e2b56d78b1773b1c3d8b3cb42cee211.pdfappalachian orogenprehnitepumpellyitegarnetbiotite |
| spellingShingle | A.A. T. Shabani Occurrence of Prehnite, Pumpellyite and Garnet in Biotite from Granitic Rocks of the Canadian Appalachians: A Mineral Chemistry Study Using Electron Microprobe Journal of Sciences, Islamic Republic of Iran appalachian orogen prehnite pumpellyite garnet biotite |
| title | Occurrence of Prehnite, Pumpellyite and Garnet in Biotite from Granitic Rocks of the Canadian Appalachians: A Mineral Chemistry Study
Using Electron Microprobe |
| title_full | Occurrence of Prehnite, Pumpellyite and Garnet in Biotite from Granitic Rocks of the Canadian Appalachians: A Mineral Chemistry Study
Using Electron Microprobe |
| title_fullStr | Occurrence of Prehnite, Pumpellyite and Garnet in Biotite from Granitic Rocks of the Canadian Appalachians: A Mineral Chemistry Study
Using Electron Microprobe |
| title_full_unstemmed | Occurrence of Prehnite, Pumpellyite and Garnet in Biotite from Granitic Rocks of the Canadian Appalachians: A Mineral Chemistry Study
Using Electron Microprobe |
| title_short | Occurrence of Prehnite, Pumpellyite and Garnet in Biotite from Granitic Rocks of the Canadian Appalachians: A Mineral Chemistry Study
Using Electron Microprobe |
| title_sort | occurrence of prehnite pumpellyite and garnet in biotite from granitic rocks of the canadian appalachians a mineral chemistry study using electron microprobe |
| topic | appalachian orogen prehnite pumpellyite garnet biotite |
| url | https://jsciences.ut.ac.ir/article_23037_9e2b56d78b1773b1c3d8b3cb42cee211.pdf |
| work_keys_str_mv | AT aatshabani occurrenceofprehnitepumpellyiteandgarnetinbiotitefromgraniticrocksofthecanadianappalachiansamineralchemistrystudyusingelectronmicroprobe |