نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه زمینشناسی دانشگاه سیستان و بلوچستان، زاهدان، ایران
2 گروه زمینشناسی، دانشگاه سیستان و بلوچستان، زاهدان، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The Sefidsang Antimony-Gold deposit lies in eastern Iran's flysch zone, on the southern margin of the Zahedan granitoid. Mineralization occurs as siliceous veins in granitoid and flysch units, with hypogene stibnite, pyrite, and gold, and supergene iron oxides. Fluid inclusion microthermometry reveals H₂O–NaCl and H₂O–NaCl–CO₂ systems. Homogenization temperatures of 208–315°C and salinities of 0.2–4 wt% NaCl indicate epithermal conditions. Boiling and fluid mixing controlled ore deposition. Stibnite formed at pH<8 and moderate oxygen fugacity within pyrite's stability field. Cooling and acidification caused co-precipitation of stibnite and gold. The granitoid provided metals and heat, while meteoric fluids circulated, leached elements, and deposited mineralization near surface. The deposit is epithermal to mesothermal.
کلیدواژهها [English]
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