دوره 32، شماره 3 - ( 7-1403 )
جلد 32 شماره 3 صفحات 536-525 |
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Yazdani M. Zoned pyroxenes as indicators for magmatic process in basaltic rocks in North West of Iran. www.ijcm.ir 2024; 32 (3) :525-536
URL: http://ijcm.ir/article-1-1802-fa.html
URL: http://ijcm.ir/article-1-1802-fa.html
یزدانی مریم. پیروکسن منطقه بندی شده نشانگر فرایندهای ماگمایی در بازالتهای شمال غرب ایران. مجله بلورشناسی و کانی شناسی ایران. 1403; 32 (3) :525-536
گروه مهندسی معدن، مرکز آموزش عالی شهید باکری میاندوآب، دانشگاه ارومیه، ارومیه، ایران
چکیده: (534 مشاهده)
منطقهبندی پیروکسن نشانگر فرایندهای رخ داده طی تبلور، جایگاه زمینساختی، ترکیب شیمیایی ماگما، جدایش ماگمایی، شرایط ترمودینامیکی، آمیختگی و هضم است. بازالتهای پیرانشهر دارای کلینوپیروکسن با منطقهبندی نوسانی هستند که در اثر فرایند انتشار تدریجی عناصر در کانی پیروکسن شکل گرفتهاند. منطقهبندی کلینوپیروکسن نشان میدهد که بخش مرکزی در ماگمای غنی از Mg و کناره های کانی در ماگمای فقیر از Mg و غنی از Fe متبلور شدهاند. بررسی شیمی کانی پیروکسن نشان داد که تبلور کانی در محیط غنی از آب، گریزندگی بالا اکسیژن پهنه ابرفرورانشی، مرز پوسته بالایی و گوشته پایینی رخ داده و دگرگونی عناصر در منطقه بندی نوسانی پیروکسن ناشی از تبلور جدایشی برآمده از کاهش دما طی تبلور است.
واژه‌های کلیدی: بازالت، پیروکسن، منطقهبندی، پیرانشهر، شمال غرب ایران.
فهرست منابع
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