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مریم امین الرعایایی یمینی فرامرز طوطی محمدرضا امین الرعایایی یمینی جمشید احمدیان

چکیده

کانسار مس پورفیری ظفرقند در شمال‌شرق اصفهان و در بخش مرکزی کمان ماگمایی ارومیه- دختر واقع شده است. این کانسار با دارا بودن پهنه‌های دگرسانی پتاسیک، فیلیک، آرژیلیک و پروپیلیتی در نتیجه نفوذ استوک پورفیری (گرانودیوریت با سن 19-21 میلیون سال) در واحدهای آتشفشانی و نیمه نفوذی با سن 56 میلیون سال تشکیل شده است. پیریت، کالکوپیریت، بورنیت و مولیبدنیت با بافت‌های گوناگون افشان و رگه‌ای، کانی‌های سولفیدی اولیه وکوولیت و کالکوسیت از سولفیدهای ثانویه این کانسار به شمار می‌آیند. در این پژوهش با بررسی داده‌های ریزبافت‌ها و منطقه‌بندی An%-FeO در درشت بلور‌های پلاژیوکلاز موجود در این سنگ‌ها، مدل ژرف‌یابی ماگمایی برای سنگ‌های نفوذی-آتشفشانی میزبان کانسار مس پورفیری ظفرقند پیشنهاد می‌شود که تبلور در آشیانه ماگمایی پوسته‌ای اساساً توسط فرآیند رشد- انحلال و اختلاط ماگمای مافیک در پوسته انجام شده و احتمالاً مقادیر زیادی مس برای کانی‌زایی در این کانسار فراهم کرده است.

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ارجاع به مقاله
امین الرعایایی یمینیم., طوطیف., امین الرعایایی یمینیم., & احمدیانج. (۱۳۹۷-۰۲-۰۳). پلاژیوکلاز به‌عنوان شاهدی از تحولات سیستم ماگمایی کانسار مس پورفیری ظفرقند، شمال‌شرق اصفهان. زمین‌شناسی اقتصادی, 10(1), 61-76. https://doi.org/10.22067/econg.v10i1.49039
نوع مقاله
علمی- پژوهشی

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