دوره 30، شماره 4 - ( 10-1401 )                   جلد 30 شماره 4 صفحات 682-667 | برگشت به فهرست نسخه ها


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Teimouri S, Ghorbani M, Modabberi S. Petrography and mineral chemistry of metasomatites related to Iron-Apatite mineralization in Kiruna-type deposits in the Bafq region with a focus on Choghart and Chadormalu mining district, Central Iran. www.ijcm.ir 2022; 30 (4) :667-682
URL: http://ijcm.ir/article-1-1814-fa.html
تیموری سیده سمیه، قربانی منصور، مدبری سروش. سنگ نگاری و شیمی کانی انواع مختلف سنگ‌های متاسوماتیتی در ارتباط با کانی‌زایی آهن- آپاتیت نوع کایرونا در منطقه بافق، با تمرکز بر کانسارهای چغارت و چادرملو، ایران مرکزی. مجله بلورشناسی و کانی شناسی ایران. 1401; 30 (4) :667-682

URL: http://ijcm.ir/article-1-1814-fa.html


1- دانشگاه شهید بهشتی
2- دانشگاه تهران
چکیده:   (300 مشاهده)
کانسارهای آهن- آپاتیت چغارت و چادرملو در کرانه غربی قطعه بافق قرار دارند و پی­سنگ دگرگونی پرکامبرین به سن نئوپروتروزوییک پسین، واحدهای رسوبی- آتشفشانی پرکامبرین پسین و توده­های نفوذی پرکامبرین پسین- کامبرین پیشین میزبان آنها در منطقه بافق هستند. خاستگاه و ارتباط سنگ­هایی که از دیرباز با نام متاسوماتیت شناخته می­شوند، همواره با پرسش همراه بوده است. براساس بررسی­های سنگ­نگاری و شیمی کانی انجام شده، پنج نوع دگرسانی گرمابی در این سنگ­ها تشخیص داده شده است. قدیمی­ترین آن­ها، دگرسانی سدیمی بوده که در فواصل دورتر از ذخایر آهن رخ داده است و با حضور کانی آلبیت با بافت شطرنجی شناخته می­شود. دگرسانی جوانتر سدیمی-کلسیمی، یک مدل دگرنهادی بزرگ و دو مرحله­ای است که با حضور ترمولیت- اکتینولیت مشخص می­­شود و همزمان با کانی­سازی آهن رخ داده است. دگرسانی پتاسیمی بعدی، در اثر هجوم مایع­های غنی از پتاسیم و تشکیل فلدسپار پتاسیم و بیوتیت ثانویه بوجود آمده است. دگرسانی­های سیلیسی و سریسیتی بطور تاْخیری در منطقه رخ داده­اند.     
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نوع مقاله: پژوهشي | موضوع مقاله: تخصصي

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