دوره 26، شماره 4 - ( 10-1397 )                   جلد 26 شماره 4 صفحات 915-928 | برگشت به فهرست نسخه ها


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Shekari, Sadeghian M, Ghasemi H A, Minggou Z. Mineral chemistry and Thermobarometry of Middle Jurassic diabasic dikes Cutting metamorphic - igneous Shotor-Kuh complex (SE Shahrood). www.ijcm.ir. 2019; 26 (4) :915-928
URL: http://ijcm.ir/article-1-1200-fa.html
شکاری سکینه، صادقیان محمود، قاسمی حبیب الله، مینگو جای. شیمی کانی و دما- فشارسنجی دایک‌های دیابازی ژوراسیک میانی قطع کننده مجموعه دگرگونی- آذرین شترکوه (جنوب شرق شاهرود). مجله بلورشناسی و کانی شناسی ایران. 1397; 26 (4) :915-928

URL: http://ijcm.ir/article-1-1200-fa.html


دانشگاه صنعتی شاهرود
چکیده:   (221 مشاهده)
مجموعه دگرگونی - آذرین شترکوه به سن نئوپروتروزوئیک­پایانی، در بخش ­شمالی پهنه­ساختاری ایران­مرکزی و در
جنوب­شرق شاهرود واقع است. این مجموعه توسط تعدادی دایک دیابازی به سن ژوراسیک­میانی قطع شده است. پلاژیوکلاز، پیروکسن و بیوتیت کانی­های اصلی تشکیل دهنده این دایک­ها هستند. پلاژیوکلازها بیشتر دارای ترکیب آندزینی (
Ab69-51An31-49) هستند. پیروکسن­ها دارای ترکیب En30-45 Fs29-42Wo25-29 و از نوع اوژیت کم­کلسیم یا نیمه کلسیمی و بیوتیت­ها از نوع سرشار از منیزیم هستند. نتایج زمین‌دما- فشارسنجی با استفاده از شیمی کانی کلینوپیروکسن، دمای 1100 تا1200 درجه سانتی­گراد و فشار 2 تا 10 کیلوبار را نشان می­دهند. با توجه به ترکیب شیمیایی کانی­ها، سرشت ماگمای سازنده این دایک­ها، آهکی-قلیایی بوده و فوگاسیته اکسیژن طی تشکیل و تبلور کانی­های سازنده آنها نسبتاً کم بوده است. دایک­های مورد نظر، در یک جایگاه زمین­ساختی کششی موضعی درون قاره­ای از نوع حوضه کششی پشت­کمانی (فرورانش نئوتتیس به زیر پهنه ساختاری ایران مرکزی) تشکیل شده­اند.    
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نوع مطالعه: پژوهشي | موضوع مقاله: تخصصي
دریافت: ۱۳۹۷/۱۰/۸ | پذیرش: ۱۳۹۷/۱۰/۸ | انتشار: ۱۳۹۷/۱۰/۸

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