اثر روش های تخمین بر روی شناسایی آنومالی ها با مدلسازی فرکتالی در منطقه ایرانکوه، ایران مرکزی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 Department of Mining Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

2 بخش مهندسی معدن دانشگاه آزاد واحد تهران جنوب

چکیده

هدف از این مطالعه یافتن اثر روش-های تخمین کریجینگ معمولی و عکس فاصله وزن دار بر روی جدایش آنومالی های ژئوشیمیایی حاصل از نمونه های خاک برجا با استفاده از روش فرکتالی عیار-مساحت در منطقه ایرانکوه واقع در ایران مرکزی می باشد. نخست واریوگرام ها و بیضوی ناهمسانگردی برای مدلسازی توزیع عیار سرب و روی ساخته شدند. سپس منحنی فرکتالی براساس نتایج حاصل از این روش های تخمین ترسیم شده و واریانس تخمین هر یک از جوامع آنومالی تعیین شدند. براساس مقایسه بین واریانس های تخمین جوامع و آنومالی های گوناگون مشخص شد که واریانس های تخمین برای آنومالی های حاصل از روش تخمین کریجینگ معمولی کمتر از روش عکس فاصله وزن دار است. آنومالی های شدید و بالای سرب و روی حاصل از مدلسازی فرکتالی براساس روش کریجینگ معمولی دارای واریانس کمتر از آنومالی های متناظر ناشی از روش تخمین عکس فاصله وزن دار است. براساس نتایج حاصله آنومالی های اصلی سرب و روی در شمال غربی محدوده قرار دارند.

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