هیدروژئوشیمی عناصر نادر خاکی در چشمه های گرمابی و سرد آتشفشان تفتان

نوع مقاله : مقاله پژوهشی

نویسندگان

1 عضو هیئت علمی، دانشکده علوم زمین، دانشگاه خوارزمی

2 کارشناسی ارشد زمین شناسی اقتصادی، دانشگاه خوارزمی

3 عضو هیئت علمی، دانشکده علوم، دانشگاه خوارزمی

چکیده

      از کاربردهای مهم مطالعه عناصر نادر خاکی (REE) در سیستم های زمین گرمایی ، بررسی اثر آب-سنگ و اکتشاف منابع زمین گرمایی است. بدین منظور ، غلبه عناصر نادر خاکی در چشمه ها و سنگهای آتش افشان تفتان اندازه گیری و بر اساس کندریت و توده سنگ نرمالایز شده است. نتایج حاصل از هیدروشیمی نشان داد که نابود شدن آب و واکنش آب-سنگ از مهمترین عوامل مؤثر بر شیمی آب چشمه ها وجود دارد. روند کندریت-نرمالایز و بررسی کاربلکس های انتقال دهنده REE در چشمه های گرمابی ، نشان دهنده عملکرد بالاتر از یون سولفات در سیستم زمین گرمایی آتشفشان تفتان است. بررسی خصوصیات و نسبتهای REE در چشمه ها و سنگهای آتش نشانی نشان می دهد که منشأ اصلی عناصر نادر خاکی در چشمه ها ، سنگهای داسیتی-آندزیتی منطقه است. نتایج نمودار سنگ-نرمالایز REE ها و مطالعه مقاطع نازک نشان داد که دگرسانی حاشیه کانی ها ، فازهای ثانویه و زمینه سنگ های آتشفشانی ؛ که دارای غلبه بر بالای عناصر نادر خاکی به جزء یوروپیم است باعث افزایش مقاومت در این عناصر در چشمه شده است.
 

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