دوره 27، شماره 2 - ( 4-1398 )                   جلد 27 شماره 2 صفحات 401-410 | برگشت به فهرست نسخه ها


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Riyahi Samani F, Shabanian Boroujeni N, Davoudian Dehkordi A, Bakhtiyari B. Fractal analysis of quartz grain boundary in the gneissic granite of Abadchi, North of Shahrekord. www.ijcm.ir. 2019; 27 (2) :401-410
URL: http://ijcm.ir/article-1-1274-fa.html
ریاحی سامانی فریبا، شبانیان بروجنی ناهید، داودیان دهکردی علیرضا، بختیاری بهناز. بررسی فرکتال مرز دانه‌های کوارتز در گرانیت گنیس‌ آبادچی، شمال شهرکرد. مجله بلورشناسی و کانی شناسی ایران. 1398; 27 (2) :401-410

URL: http://ijcm.ir/article-1-1274-fa.html


دانشگاه شهرکرد
چکیده:   (360 مشاهده)
توده گرانیت گنیس آبادچی در شمال دریاچه زاینده­رود، در پهنه ساختاری سنندج-سیرجان قرار دارد. این توده از نظر کانی شناسی، دارای کانی­های کوارتز، پلاژیوکلاز، فلدسپات پتاسیم، بیوتیت، آمفیبول، موسکویت، زیرکن، اسفن و آلانیت است. کوارتز یکی از فراوان­ترین کانی­های سازنده­ی این سنگ­هاست که از نظر بافتی شرایط متفاوت دگرشکلی دینامیکی وارد بر سنگ­های مورد بررسی را به خوبی نشان می‌دهد. بلورهای کوارتز شواهدی از باز تبلور کانی (BLG)، چرخش زیردانه­ای (SGR) و مهاجرت مرزدانه­ای (GBM) را نشان می­دهند. تغییر شکل بلورهای کوارتز وابسته به دما و نرخ کرنش است که توسط نمودار دما/ نرخ کرنش می­توان مقدار تغییر شکل را برآورد کرد. بطوری که، مقدار بعد فرکتال در مرز بلورهای کوارتز سنگ­های مورد بررسی بین 23/1 تا 11/1 و دما بین 400-250 تا 750-500 درجه سانتی­گراد است. براساس دما و بعد فرکتال محاسبه شده، نرخ کرنش برای چهار گستره اندازه­گیری  شده  بین 6/11- 10 تا 6/6- 10 است. نتایج بدست آمده از نمودارها با شواهد دگرشکلی بلورهای کوارتز (GBM, SGR ,BLG) همخوانی داشتند.    
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نوع مطالعه: پژوهشي | موضوع مقاله: تخصصي
دریافت: ۱۳۹۸/۳/۱۲ | پذیرش: ۱۳۹۸/۳/۱۲ | انتشار: ۱۳۹۸/۳/۱۲

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