دوره 29، شماره 1 - ( 1-1400 )                   جلد 29 شماره 1 صفحات 3-18 | برگشت به فهرست نسخه ها


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Kordi Sykan, Shahrokhiِ. 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
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

URL: http://ijcm.ir/article-1-1582-fa.html


1- گروه زمین‌شناسی، دانشکده علوم پایه، واحد خرم‌آباد، دانشگاه آزاد اسلامی، خرم‌آباد، ایران
چکیده:   (141 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.     
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نوع مقاله: پژوهشي | موضوع مقاله: تخصصي

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