کانی شناسی ونوع زایش کانسنگ آهن در معدن آبپونه، پهنه سنندج سیرجان

نوع مقاله : مقاله پژوهشی

نویسنده

گروه زمین شناسی مواد معدنی و منابع آب، دانشکده علوم زمین، دانشگاه شهیدبهشتی، تهران، ایران

چکیده

معدن آهن آبپونه در 85 کیلومتری غرب استان اصفهان در بخش میانی پهنه ساختاری سنندج‌سیرجان قرار دارد. سنگ میزبان کانسنگ آبپونه شامل ماسه سنگ دگرگونه، شیست و فیلیت است. کانی­های سیلیکاتی که ضمن دگرگونی سنگ‌ میزبان درکانسنگ ایجاد شده‌اند، موسکویت و کلریت بوده و نشاندهنده‌ی رخساره شیست‌سبز هستند.کانسنگ آهن به‌طور عمده با بافت نواری و همچنین با بافت‌توده‌ای وجود دارد. کانسنگ آهن از نظر بافت، کانی‌شناسی و ترکیب‌ شیمیایی، قابل مقایسه با کانسنگ‌های آهن‌نواری دگرگون شده‌است. ویژگی‌های بافتی و ساختی نشان‌دهنده خاستگاه رسوبی‌درونزادی کانسنگ در آبپونه است. دگرگونی پس از تشکیل کانسنگ رخ‌داده و سبب بازتبلور کانسنگ و سنگ‌میزبان شده‌است. اجزای تشکیل‌دهنده کانسنگ ‌در نتیجه‌ی فرسایش سنگ­های تخریبی قاره‌ای و به احتمال بسیار از سیال­های گرمابی وابسته به فعالیت‌های آتشفشانی زیردریایی تأمین شده‌ باشند. الگوی توزیع عناصر اصلی و فرعی کانسنگ و سنگ‌میزبان، در نمودارهای گوناگون کمابیش مشابه بوده و این امر نشانگر تشکیل آنها در یک محیط رسوبی مشابه است.

کلیدواژه‌ها

عنوان مقاله [English]

Mineralogy and type of iron ore generation in Abponeh mine, Sanandaj Sirjan zone

نویسنده [English]

  • shiva shakeri
Department of Geology, Minerals and Water Resources, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, Iran
چکیده [English]

Abpooneh iron mine is located 85 km west of Isfahan province in the middle part of Sanandaj-Sirjan structural zone. The host rock of Abpooneh ore are meta sandstone, schist and phyllite. Silicate minerals that were created during the metamorphosis of the host rock in the ore include muscovite, chlorite and indicate the green schist facies. Iron ore mainly show a banded and lumpy textures. In terms of texture, mineralogy and chemical composition, the iron ore is comparable to the metamorphosed iron ores. The textural and structural features is indicate the sedimentary-diagenetic origin of the ore in Abpooneh. Metamorphism occurred after the formation of the ore and caused the recrystallization of the ore and the host rock. The constituent components of the ore result of the erosion of continental destructive rocks and may have been provided by hydrothermal fluids related to submarine volcanic activities. The pattern of distribution of main and minor elements of ore and host rock is similar in various charts and this indicates their formation in a similar sedimentary environment.

کلیدواژه‌ها [English]

  • Abpooneh
  • Sanandaj-Sirjan
  • banded ore
  • massive ore
  • mineralogy

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  • تاریخ دریافت: 06 آبان 1402
  • تاریخ بازنگری: 07 آذر 1402
  • تاریخ پذیرش: 14 آذر 1402

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