بررسی کانی‌شناسی و زمین‌شیمی معدن بنتونیت چاه گلستان سرایان، خراسان جنوبی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد زمین شناسی اقتصادی دانشگاه تهران

2 استادیار زمین شناسی اقتصادی دانشگاه تهران

3 استادیار رسوب شناسی دانشگاه تهران

چکیده

      معدن بنتونیت چاه گلستان در شهرستان سرایان خراسان جنوبی قرار دارد. در این تحقیق با استفاده از مطالعات علوم پزشکی و زمینشیمیایی شرایط ایجاد و زایش این معدن مورد بررسی قرار گرفت. روشهای تجزیه شامل تجربی پراش پرتو X (XRD) و تجزیه شیمیایی (XRF و ICP- MS) بنتونیتها و سنگ دورنگیرشان می شود. کانی اصلی بنتونیت در این معدن ، مونتموریلونیت سدیمی است. همچنین کانیهایی مانند آلبیت ، کریستوبالیت ، کلسیت ، کوارتز ، هالیت و ارتوکلاز نیز دارند. بر اساس داده های زمینشیمیایی ماگمای مادر ریولیتی ، سری ماگمایی به وجود آورنده بنتونیتها ، آهکی _ قلیایی و محیط زمین ساخت کمان آتشفشانی با این صفحات است این معدن در یک فرآیند دیاژنتیکی بوسیله دگرسانی شیشه آتشفشانی در یک لاگون بوجود آمده است.
 

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