بررسی زمین شناسی، کانی شناسی و ژئوشیمی کانی سازی منطقه اکتشافی کودکان 2، جنوب بیرجند، شرق بلوک لوت

نوع مقاله : علمی- پژوهشی

نویسندگان

مجتمع آموزش عالی گناباد

چکیده

منطقه کودکان 2 در 180 کیلومتری جنوب بیرجند استان خراسان جنوبی واقع‌شده است. زمین‌­شناسی منطقه شامل واحدهای آذرین ترشیری از جمله سنگ‌های آتشفشانی (آندزیت و بازالت)، توده­‌های نفوذی با ترکیب گرانودیوریت، توده­‌های نفوذی نیمه­‌عمیق با ترکیب دیوریت پورفیری و نهشته­‌های آذرآواری است. سنگ میزبان کانی‌­سازی واحد آذرآواری است. در برخی نقاط کانی­‌سازی در همبری واحدهای آگلومرایی و آندزیتی رخنمون‌دارد. کانی­‌سازی در این منطقه دارای روند NE-SW و شیب NE 75-60 بوده و اغلب توسط عوامل ساختاری کنترل می‌شود. سه مجموعه رگه در این منطقه شناسایی‌شده است. مجموعه رگه سیلیسی حاوی کانی­‌سازی مس ± سرب ± روی اهمیت بیشتری دارند. کانی‌­شناسی این مجموعه رگه شامل کوارتز، اسپیکیولاریت، کالکوپیریت و گالن است. عیار مس بین 75 تا 9928 گرم در تن، عیار سرب از 7 تا بیش از 30000 گرم در تن و عیار روی بین 25 و 109285 گرم در تن متغیر است. بر اساس شواهد زمین‌شناسی وکانی­‌سازی به­‌دست آمده از محدوده اکتشافی، کانی­‌سازی منطقه کودکان 2 در ادامه کانی‌­سازی رگه­‌ای قلعه‌­زری بوده و از نوع کانسارهای طلا ± مس اکسید آهنی IOCG است.

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