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طیبه رمضانی محمد معانی جو سینا اسدی دیوید لنتز ناصر پیروزنیا

چکیده

منطقه فلززایی اهر- ارسباران یکی از مهم‌­ترین زون‌های فلززایی ایران در ترشیاری به‌شمار می­‌رود. کانه­‌زایی در منطقه اغلب وابسته به سنگ‌های ماگمایی ترشیاری است. از این منطقه، دو سیستم مس پورفیری سونگون و کیقال برای بررسی مقایسه­‌ای نحوه کانه­‌زایی انتخاب شدند. بر روی این دو کانی‌سازی بررسی زمین‌­شیمی، سیالات درگیر و کانی­‌شناسی انجام‌شد. انواع سیالات درگیر دو معدن مشابه و شامل نوع دو فازی مایع- گاز (L-V)، نوع دو فازی گاز- مایع (V-L)، نوع سه فازی مایع- گاز- جامد (گاهی هماتیت) (L-V-S)، نوع سه فازی مایع- گاز - نمک (L-V-H) و نوع چهار فازی مایع-  گاز- نمک- جامد (L-V-H-S) است. نتایج نشان داد که با وجود شباهت سنگ درون‌گیر، سنگ مادر و انواع سیالات درگیر و حتی شوری و دمای همگن­ سازی تقریباً مشابه، در وسعت دگرسانی، ضخامت پوسته و میزان CO2 سیالات آنها تفاوت­‌هایی وجود دارد. به بیان دیگر معدن سونگون به‌علت ضخامت بیشتر لیتوسفر شرایط بهتری در تأمین فلزات و تشکیل کانی­‌های سولفیدی داشته است. همچنین حضور CO2 و تشکیل فرایند نامیژاکی سیال در افزایش pH و ته­‌نشینی کانسنگ سونگون مؤثر بوده است و این موجب بارور بودن معدن سونگون و نیمه­ بارور بودن اندیس کیقال شده است.

جزئیات مقاله

کلمات کلیدی

مس پورفیری, بارور, هاله زمین شیمی, سیالات درگیر, ضخامت لیتوسفر

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ارجاع به مقاله
رمضانیط., معانی جوم., اسدیس., لنتزد., & پیروزنیان. (2019). مقایسه سیستم‌ های مس پورفیری سونگون و کیقال، شمال غرب ایران : با تأکید بر مطالعه سیالات درگیر. زمین‌شناسی اقتصادی, 10(2), 403-424. https://doi.org/10.22067/econg.v10i2.61340
نوع مقاله
علمی- پژوهشی