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Kordi Sykan, Shahrokhiِ. Mineral chemistry and geothermometry of chlorite in Zavarijan area
(NE Broujerd-Iran). www.ijcm.ir 2021; 29 (1) :3-18
URL: http://ijcm.ir/article-1-1582-fa.html
URL: http://ijcm.ir/article-1-1582-fa.html
کردی‌سیکان داریوش، شاهرخی سید وحید. شیمی‌کانی و زمین دماسنجی کلریت در منطقه زواری‌جان (شمال‌شرق بروجرد-ایران). مجله بلورشناسی و کانی شناسی ایران. 1400; 29 (1) :3-18
1- گروه زمین‌شناسی، دانشکده علوم پایه، واحد خرم‌آباد، دانشگاه آزاد اسلامی، خرم‌آباد، ایران
چکیده: (1361 مشاهده)
در این مقاله، از روش زمین دماسنجی کلریت برای تعیین دمای دگرگونی درجه پائین و متوسط منطقه زواری‌جان واقع در شمال‌شرق بروجرد استفاده شده‌است. محاسبه فرمول ساختاری میانگین کلریت‌های انتخابی بر اساس 14 اکسیژن بیانگر تعداد کمتر از 91/2 اتم سیلیسیم در واحد فرمولی (apfu) و مجموع کاتیون‌های هشتوجهی نزدیک به 12apfu بوده که نشان‌دهنده کلریت هشتوجهی سه‌گانه است.کسرمولی در فاز بین لایه‌ای (Xc) نشان‌دهنده نبود اسمکتیت در فاز بین لایه‌ای و خلوص کلریت است. همه عناصر اصلی در کلریت با یکدیگر همخوانی دارند و تر کیب نمونه‌های کلریت از نوع رپیدولیت-پیکنوکلریت است. زمین دماسنجی کلریت نشان‌دهنده میانگین دمای 345 درجه سانتی‌گراد است که با میانگین دمای تشکیل کلریت برآمده از دگرسانی بیوتیت همخوانی دارد. این دما همچنین نشان‌دهنده تأثیر سیالهای گرمابی نوع متوسط دما یا کوهزایی در تشکیل کلریت است. براساس این نتایج، می‌توان گفت که شکل‌گیری کلریت در ناحیه مورد بررسی ناشی از عملکرد دگرگونی ناحیه‌ای بوده است.
واژه‌های کلیدی: کلریت، کسر مولی، دگرسانی، اسمکتیت، زواری‌جان، بروجرد.
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