کانی‌شناسی و بررسی میانبارهای سیال در کانسار چندفلزی طلادار شوی، شمال غرب بانه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه زمین‌شناسی، دانشکده علوم زمین، دانشگاه شهید بهشتی، تهران، ایران

2 دانشکده علوم پایه، دانشگاه تربیت مدرس، تهران، ایران

چکیده

کانسار چندفلزی طلادار شوی در شمال­غرب پهنه سنندج- سیرجان و در 7 کیلومتری شمال­غرب بانه واقع است. کانی­سازی طلا و فلزهای همراه در کانسار شوی، در بِرش­ها و ­رگه­های سیلیسی- سولفیدی و در آخر در رگه­های سیلیسی- کربناتی ثانویه رخ‌داده است. کانسنگ از کانی­های فلزی اولیه تتراهدریت، گالن، اسفالریت، طلا و پیریت و کانی­های ثانویه اسمیت­زونیت، همی­مورفیت، سروزیت، مالاکیت و آزوریت تشکیل شده است. بر پایه ریزدماسنجی بر میانبارهای دوفازی غنی از مایع در بلورهای کوارتز و اسفالریت، بیانگر میانگین دمای همگن شدگی سیال های کانه ‌ساز 210 تا 380 درجه سانتی‌گراد و شوری 5/1 تا 4/15 درصد وزنی معادل نمک طعام است. بر اساس بررسی ویژگی­های زمین­شناسی، کانی­سازی و میانبارهای سیال، کانسار شوی بیشترین شباهت را با کانسارهای طلای کوهزایی نشان می­دهد.

کلیدواژه‌ها


عنوان مقاله [English]

Mineralogy and study of fluid inclusions in the polymetallic gold deposit of Shovey, northwest of Baneh

نویسندگان [English]

  • Mohammad Abdollahpour 1
  • Mehrdad Behzadi 1
  • Hossein Ali Tajeddin 2
1 Department of Geology, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, Iran
2 Department of Economic Geology, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, Iran
چکیده [English]

The Shovey gold-bearing polymetal deposit is located about 7 km northwest of Baneh, within the northwest of Sanandaj-Sirjan metamorphic zone. Mineralization at the Shovey deposit occurs as quartz and sulfide-bearing breccia and veins and also has occurred in the quartz-carbonate veins. Mineral assemblages consist of galena, sphalerite, pyrite, tetrahedrite, gold, smithsonite, hemimorphite, cerusite, malachite and azurite. Fluid inclusion studies on the quartz and sphalerite minerals indicate average homogenization temperatures 210 to 380°C and salinity from 1.5 to 15.4 wt.% NaCl eq. for the two-phase liquid rich inclusions. This study indicates that the main characteristics of the geology, mineralization and fluid inclusions of the Shovey deposit are similar to those of the orogenic gold deposits.

کلیدواژه‌ها [English]

  • Orogenic gold
  • Sanandaj-Sirjan metamorphic zone
  • fluid inclusions
  • Shovey
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