دوره 28، شماره 3 - ( 9-1399 )                   جلد 28 شماره 3 صفحات 609-622 | برگشت به فهرست نسخه ها


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Rezaei, Moazzen, Timmerman. Geochemistry and clinopyroxene mineral chemistry of basalts in the Gasht-Masuleh area, Alborz Mountains. www.ijcm.ir. 2020; 28 (3) :609-622
URL: http://ijcm.ir/article-1-1516-fa.html
رضائی لیلا، مؤذن محسن، تیمرمن مارتین. ویژگی‌های زمین شیمیایی و شیمی کانی کلینوپیروکسن سنگ‌های بازالتی منطقه گشت-ماسوله کوه‌های البرز. مجله بلورشناسی و کانی شناسی ایران. 1399; 28 (3) :609-622

URL: http://ijcm.ir/article-1-1516-fa.html


دانشگاه تبریز
چکیده:   (152 مشاهده)
سنگ­های بازالتی در منطقه گشت-ماسوله در جنوب غرب فومن، استان گیلان، در واحدهای ژوراسیک و نیز واحدهای کرتاسه پسین در منطقه گسترش دارند. براساس شیمی سنگ کل، عدد منیزیم این سنگ­ها بین 30 و 7/31 است. الگوی عناصر خاکی نادر (REE)، غنی شدگی REE سبک را نسبت به REE سنگین نشان می­دهد (8/9 – 7/7  LaN/YbN =). ناهنجاری منفی Nb، Ta و Ti در نمودار عنکبوتی عناصر جزئی بهنجار شده به گوشته اولیه بیانگر تشکیل مذاب این سنگ­ها در محیط وابسته به قوس است. ویژگی شیمیایی درشت بلور کلینوپیروکسن با ترکیب دیوپسید نشانگر تبلور این کانی از یک ماگمای آهکی قلیایی در یک محیط وابسته به کشش است. براساس ویژگی­های زمین شیمیایی و شیمی کانی، این سنگ­ها در یک محیط کششی متبلور شده­اند و همچنین دارای ویژگی­های محیط قوس هستند که به ارث رسیده از فرورانش پیشین به احتمال بسیار فرورانش پوسته اقیانوسی تتیس کهن، در شمال ایران در رشته کوه البرز است.
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نوع مقاله: پژوهشي | موضوع مقاله: تخصصي

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