دوره 30، شماره 2 - ( 3-1401 )                   جلد 30 شماره 2 صفحات 294-281 | برگشت به فهرست نسخه ها


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Khoddam, Jafari, Askari, Aliabadi, Hosseinkhani, Ramezani. Genesis of the Kishan Pb-Zn mineralization, western Iran based on mineralogy, fluid inclusion and sulfur isotope evidences. www.ijcm.ir. 2022; 30 (2) :281-294
URL: http://ijcm.ir/article-1-1748-fa.html
خدام میثم، جعفری محمدرضا، عسگری عباس، علی‌آبادی محمدعلی، حسینخانی احمد، رمضانی طیبه. الگوی تشکیل ذخیره Pb-Zn کیشان، غرب ایران براساس شواهد کانی‌شناسی، سیالات درگیر و ایزوتوپ گوگرد. مجله بلورشناسی و کانی شناسی ایران. 1401; 30 (2) :294-281

URL: http://ijcm.ir/article-1-1748-fa.html


1- دانشگاه آزاد اسلامی واحد محلات
2- دانشگاه آزاد اسلامی واحد تهران شمال
3- شرکت معادن سرمک
4- دانشگاه بوعلی‌سینا
چکیده:   (186 مشاهده)
ذخیره سرب و روی کیشان از ذخایر کمربند فلززایی ملایر- اصفهان است که در شمال اراک، استان مرکزی قرار دارد. پس از بررسی کانی‌شناسی آن و تعیین سه مرحله پیش‌کانه‌زایی، کانه‌زایی اصلی و پساکانه‌زایی، ریزدما‌سنجی میانبار سیال اولیه رگه‌های کوارتزی همزمان با کانه‌زایی، دمای همگن‌شدگی 140 تا °C 272 (متوسط °C 47/208 در 68 میانبار) و شوری10 تا
% NaCl   wt.22 (متوسط % NaCl  wt. 78/17 در 68 میانبار) و چگالی 9/0 تا gr/cm3 1/1 را نشان داد که شبیه ذخایر نوع ایرلندی است.  همچنین ایزوتوپ گوگرد شش نمونه گالن از مرحله اصلی انتخاب و تجزیه شدند. مقدار δ34S کانه گالن بین 76/3- و 36/5- بدست آمد که با تصحیح دمایی داده‌های ایزوتوپی براساس دمای میانگین °C 200، مقدار δ34SH2S گالن 98/0- تا 76/1- بدست آمد. سرانجام، می‌توان فلززایی ذخیره کیشان را با فرایند آمیختگی شورابه‌های به نسبت چگال از دریای همزمان با سیال های کم‌شور دمابالا و فلزدار در حال گردش در سنگ بستر شیل- ماسه‌سنگی (سازند شمشک) در ارتباط دانست. البته با توجه به گستردگی توده‌های آذرین منطقه، شناخت خاستگاه احتمالی توده‌های ماگمایی در تامین گوگرد و فلز این ذخیره نیز نیاز به سن‌سنجی دقیق آن‌ها و بررسی بیشتر دارد.
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نوع مقاله: پژوهشي | موضوع مقاله: تخصصي

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