دوره 27، شماره 1 - ( 1-1398 )                   جلد 27 شماره 1 صفحات 31-46 | برگشت به فهرست نسخه ها


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Jafari S R, Sepahi A A, Moazzen M, Shahbazi H. The study of continuous and discontinuous zoning of garnet mineral in the migmatites of the Hamedan region and its petrogenetic applications . www.ijcm.ir. 2019; 27 (1) :31-46
URL: http://ijcm.ir/article-1-1223-fa.html
جعفری سیده راضیه، سپاهی علی اصغر، موذن محسن، شهبازی حسین. بررسی منطقه‌بندی پیوسته و ناپیوسته گارنت در میگماتیت‌های منطقه همدان و کاربردهای سنگ‌زایی آن. مجله بلورشناسی و کانی شناسی ایران. 1398; 27 (1) :31-46

URL: http://ijcm.ir/article-1-1223-fa.html


دانشگاه بوعلی سینا همدان
چکیده:   (151 مشاهده)
در منطقه همدان، سنگ­های میگماتیتی با ساختارهای مختلف رخنمون دارند که ساخت لایه­ای فراوانترین آنهاست. کانی­های شاخص متاپلیت­ها مانند گارنت (آلماندین)، استارولیت، آندالوزیت، سیلیمانیت، کیانیت، فیبرولیت، کردیریت، پلاژیوکلاز (آندزین) و اسپینل (هرسینیت) در میگماتیت­ها حضور دارند. گارنت در هر سه بخش روشن، تیره-روشن و تیره میگماتیت­ها حضور دارد و دستخوش رخدادهای مختلف دگرگونی (پیشرونده، پسرونده و ذوب بخشی) شده است. گارنت­ها دارای منطقه­بندی شیمیایی پیوسته و ناپیوسته برای عناصر شاخص Fe، Mg،  Mnو Ca هستند که الگوی رفتاری این عناصر در آنها یکسان نبوده و عواملی مثل وجود کانی­های تک­بلور چندهسته­ای، شرکت یا عدم شرکت گارنت­ها در فرایند ذوب­بخشی و چند دگرگونی منطقه در آن دخالت داشته­اند. ناپیوستگی در رشد بلورها بیانگر رشد مجدد طی یک رخداد دگرگونی مجزاست و می­تواند نشان دهنده دست کم دو رخداد دگرگونی باشد.
متن کامل [PDF 5846 kb]   (71 دریافت)    
نوع مطالعه: پژوهشي | موضوع مقاله: تخصصي
دریافت: ۱۳۹۷/۱۲/۲۵ | پذیرش: ۱۳۹۷/۱۲/۲۵ | انتشار: ۱۳۹۷/۱۲/۲۵

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