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Saeidi, Hajialioghli, Moazzen. whole rock and study of formation of eastern gneisses of Salmas
(west of Urumia Lake), NW Iran. www.ijcm.ir 2021; 29 (1) :81-96
URL: http://ijcm.ir/article-1-1587-fa.html
URL: http://ijcm.ir/article-1-1587-fa.html
سعیدی ثریاسادات، حاجی علی‌اوغلی رباب، مؤذن محسن. بررسی شیمی سنگ کل و محیط تکتونیکی گنیسهای شرق سلماس
(غرب دریاچه ارومیه)، شمال غرب ایران. مجله بلورشناسی و کانی شناسی ایران. 1400; 29 (1) :81-96
1- گروه علوم زمین، دانشکده علوم طبیعی، دانشگاه تبریز، تبریز، ایران
چکیده: (1057 مشاهده)
گنیسهای شرق سلماس در شمالیترین بخش پهنه سنندج – سیرجان به دو صورت نواری و دگرشکل در شش گروه با ترکیبهای سنگ شناسی مختلف دیده میشوند که سنگ مادر آنها از نوع پاراگنیس، با نوع سنگ مادر رسوبی آرکوز و از نظر بافتی نابالغ هستند. براساس بررسیهای انجام شده، سنگ مادر گنیسهای مورد بررسی از نظر روند بلوغ شیمیایی در گستره آب و هوایی مرز خشک به نیمه خشک، با ترکیب گرانیتی متوسط و شاخص شیمیایی دگرسانی حدود 55 درصد تعیین شده است. روند خطی در نمودارهای تغییرات اکسیدهای اصلی سنگ خاستگاه مادر گنیسهای منطقه، بیانگر پدیدهی ذوببخشی و گرانیتیشدن در تشکیل این سنگهاست که الگوی نمودارهای بهنجارشده این سنگها همخوانی خوبی با نمودارهای پاراگنیسهای نوعی دنیا نشان میدهند. براساس بررسی نمودارهای مختلف، محیط تشکیل زمینساختی گنیسها بیشتر از نوع کرانه قارهای با روند رسوبهای فعال است.
واژه‌های کلیدی: کانی شناسی، شیمی سنگ کل، گنیس، پاراگنیس، شرق سلماس، غرب دریاچه ارومیه، پهنه سنندج - سیرجان.
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