دوره 26، شماره 2 - ( 4-1397 )                   جلد 26 شماره 2 صفحات 437-454 | برگشت به فهرست نسخه ها


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Petrography and mineral chemistry of metasomatized gabbros from the Anarak Ophiolite . www.ijcm.ir. 2018; 26 (2) :437-454
URL: http://ijcm.ir/article-1-1109-fa.html
احمدی محمود، شریفی مرتضی، ترابی قدرت. سنگ‌نگاری و شیمی کانی گابروهای دگرنهاد شده افیولیت انارک. مجله بلورشناسی و کانی شناسی ایران. 1397; 26 (2) :437-454

URL: http://ijcm.ir/article-1-1109-fa.html


دانشگاه اصفهان
چکیده:   (333 مشاهده)
افیولیت انارک به سن دیرینه زیستی با روند شرقی - غربی در شمال شهر انارک واقع است. علاوه بر گابروهای موجود در توالی افیولیتی انارک، توده­هایی از گابروهای دگرنهاد شده به شکل استوک و دایک درون افیولیت انارک نفوذ کرده­اند. گابروهای دگرنهاد شده جوانتر از افیولیت انارک و قدیمی­تر از مجموعه دگرگونی انارک بوده و دربردارنده کانی­های دیوپسید و اوژیت، هورنبلند اکتبنولیتی، اکتینولیت، ترمولیت، فلوگوپیت، آلبیت و الیگوکلاز، پیکنوکلریت و پنینیت، اپیدوت، گارنت، اسفن، آپاتیت، پرهنیت، کلسیت و کانی­های کدر هستند. نفوذ آب دریا تا پوسته زیرین و گوشته بالایی باعث دگرنهادی دمای بالای گابروها شده است. ناهنجاری مثبت Pb و ناهنجاری منفی Ti, Nb, Ta در شیمی سنگ کل و کلینوپیروکسن و آمفیبول نشانگر محیط زمین­ساختی قوس آتشفشانی وابسته به مناطق فرورانش است. دمای تبلور دیوپسید 1150 تا 1200، فلوگوپیت 750، هورنبلند اکتینولیتی. 600، کلریت 360-540 و اکتینولیت 450 درجه سانتیگراد است.    
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نوع مطالعه: پژوهشي | موضوع مقاله: تخصصي
دریافت: ۱۳۹۷/۴/۱۶ | پذیرش: ۱۳۹۷/۴/۱۶ | انتشار: ۱۳۹۷/۴/۱۶

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