دوره 28، شماره 1 - ( 1-1399 )
جلد 28 شماره 1 صفحات 232-217 |
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Sameti M, Zamanian H, Asadi Harooni H. Geochemical and fluid inclusion studies of Kalchuyeh Cu-Au epithermal mineralization in the central part of the Urumieh-Dokhtar magmatic arc. www.ijcm.ir 2020; 28 (1) :217-232
URL: http://ijcm.ir/article-1-1429-fa.html
URL: http://ijcm.ir/article-1-1429-fa.html
صامتی منا، زمانیان حسن، اسدی هارونی هوشنگ. بررسی زمین شیمیایی و میانبار سیال مس-طلای فراگرمایی کالچویه در بخش میانی کمان ماگمایی ارومیه-دختر. مجله بلورشناسی و کانی شناسی ایران. 1399; 28 (1) :217-232
منا صامتی* 
1، حسن زمانیان1 ، هوشنگ اسدی هارونی2
1، حسن زمانیان1 ، هوشنگ اسدی هارونی2
1- دانشگاه لرستان
2- دانشگاه صنعتی اصفهان
2- دانشگاه صنعتی اصفهان
چکیده: (2297 مشاهده)
کانسار مس– طلای کالچویه در بخش مرکزی کمان ماگمایی ارومیه-دختر قرار دارد. میزبان این کانهزایی بیشتر سنگهای دیوریتی، کوارتز دیوریتی و آندزیتی هستند. کانهزایی در مرحله درونزادی با کالکوپیریت، پیریت، گالن و مگنتیت مشخص میشود که در مرحله برونزاد با ایجاد کالکوسیت، کوولیت، مالاکیت، و گوئتیت ادامه مییابد. بر اساس بررسیهای زمین شیمیایی، مقدار Lan/Ybn بین 2/2 تا 3/6 و Eu/Eu* از 7/0 تا 1/1 متغیر است. تودههای درونی میزبان کانهزایی در منطقه کالچویه ویژگی ماگماهای پهنههای فرورانش، یعنی غنیشدگی از عناصر سنگ دوست بزرگ یون (LILE) و تهی شدگی از عناصر با شدت میدان بالا (HFSE) با بیهنجاری منفی در Ti را نشان میدهند. دادههای میانبارهای سیال، دمای˚C 310-150، شوری 4-1/0 (درصد وزنی نمک طعام) و ژرفای حدود 400 متر را برای کانهزایی در کانسار کالچویه نشان میدهند. روند تکاملی سیال در کانسار کالچویه سردشدگی، رقیقشدگی سطحی و جوشش را نشان میدهد. شواهدی از جمله بافتهای نواری و شانهای در کوارتز، کلسیت تیغهای، برش گرمابی، دگرسانی پروپلیتی و شواهد میانبارهای سیال چون دما و شوری ماهیت فراگرمایی سولفیدشدگی پایین برای کانسار کالچویه را تایید میکند.
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