دوره 31، شماره 1 - ( 1-1402 )
جلد 31 شماره 1 صفحات 74-59 |
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Tajbakhsh G, Khodami M, Monsef R. Mineral chemistry and geothermo-barometry based on amphibole of alkali gabbro dykes of Zarigan, northeast of Bafq. www.ijcm.ir 2023; 31 (1) :59-74
URL: http://ijcm.ir/article-1-1738-fa.html
URL: http://ijcm.ir/article-1-1738-fa.html
تاج بخش غلامرضا، خدامی مهناز، منصف رضا. شیمی کانی و زمین دما-فشارسنجی بر پایه کانی آمفیبول دایک‌های قلیایی گابرویی زریگان،
شمال شرق بافق. مجله بلورشناسی و کانی شناسی ایران. 1402; 31 (1) :59-74
غلامرضا تاج بخش* 
1، مهناز خدامی1 ، رضا منصف2
1، مهناز خدامی1 ، رضا منصف2
1- دانشگاه یزد
2- دانشگاه آزاد اسلامی
2- دانشگاه آزاد اسلامی
چکیده: (730 مشاهده)
دایک‌های مافیک بسیاری با سن پالئوزوئیک پیشین در توده گرانیتوئیدی زریگان و واحدهای رسوبی میزبان آن در شمال شرق شهر بافق نفوذ کردهاند. این دایک‌ها از نظر سنگشناسی، قلیایی گابرو تا مونزوگابرو با بافت‌های دانه متوسط تا ریز بین دانهای تا دانهای هستند. کانی‌های اصلی کلینوپیروکسن، آمفیبول و پلاژیوکلاز به همراه مقادیر کمتری بیوتیت، الیوین، فلدسپار قلیایی و نفلین در این سنگ‌ها دیده میشوند. آمفیبول‌ها از گروه کلسیمی و از نوع کرسوتیت - کرسوتیت پتاسیمی هستند. محاسبات زمین دما-فشارسنجی بر پایه این کانی، فشار و دمای تبلور کرسوتیت را 2/8-3/6 کیلوبار و 1113-1040 درجه سانتیگراد مشخص کردهاند. براساس ترکیب زمین شیمیایی، کرسوتیت‌ها در گستره آمفیبول‌های قلیایی، برآمده از گوشته و مربوط به محیط‌های زمینساختی کشش درون قارهای قرار دارند. با توجه به شواهد، این کانیها در ماگماهای برآمده از خیز سست کرهای آغاز کافت پالئوتتیس به همراه عملکردهای کششی گسل‌های بنیادی قطعه پشت بادام متبلور شدهاند.
واژه‌های کلیدی: آمفیبول، کرسوتیت، زمین دما-فشارسنجی، پالئوتتیس کافت، بافق.
فهرست منابع
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