بررسی شیمی کانی آمفیبول درتعیین شرایط تشکیل توده گرانیتوئیدی شمال ساردوئیه (دشت شقین و دشت سرتشتک)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه آزاد اسلامی

2 دانشگاه ازاد اسلامی

3 دانشگاه یزد

چکیده

توده­های نفوذی الیگوسن-میوسن شمال ساردوئیه در پهنه ارومیه-دختر قرار دارد. ترکیب سنگ­شناسی گرانیتوئیدها شامل کوارتزدیوریت، تونالیت، گرانودیوریت، گرانیت و گرانوفیر است، بررسی شیمی کانی­ها در این منطقه نشان می­دهد که آمفیبول‌ها در گستره آمفیبول­های کلسیمی و از نوع اکتینولیت تا منیزیوهورنبلند قرار دارند. براساس همه تمامی روش­های به کار رفته برای دما - فشارسنجی، این توده­ها در دمای 700 تا 750 درجه سانتیگراد با گریزندگی اکسیژن 57/13- تا 76/15- و فشار پایین 1 تا 3 کیلوبار در عمق 20 کیلومتری تشکیل شده­اند، این آمفیبول­ها وابسته به محیط فرورانش هستند که با ویژگی­های زمین­ساختی ماگمایی پیشنهادی برای این توده ها، یعنی محیط کرانه فعال قاره­ای وابسته به فرورانش، همخوانی دارد.

کلیدواژه‌ها

عنوان مقاله [English]

Investigation of amphibole mineral fertilization in determining the conditions for the formation of granitoid masses in northern Sarduieh Dasht Shaghin )and Dasht Sartashtak)

نویسندگان [English]

  • Hosseini Nasab 1
  • Emami 2
  • Vosoughi Abedini 1
  • Tajbakhsh 3
  • Sheikh Zakariaee 1
1
2
3
چکیده [English]

The Oligo-Miocene intrusive masses of northern Sarduieh are located in the Urumieh-Dokhtar zone and the lithology is composed of granitoids include quartzdiorite, tonalite, granodiorite, granite and granophyre. Mineral chemistery studies showed that the amphibole minerals in diorite and granodiorites are calcic in composition and range from actinolite to magnesio-hornblende.  Geochemical and mineralogical results revealed that these bodies have been generated in the lower part of the lower crust at a temperature of 700 to 750 °C, with an oxygen fugacity of -13.57 to -15.76 and a low pressure of 1 to 3 kb. These amphiboles are subduction-related and in accordance to the tectono-magmatic features seen in these massifs, they show characteristics of subduction and active continental margin environments.

کلیدواژه‌ها [English]

  • Sarduieh
  • Urumieh-Dokhtar
  • granitoied
  • amphibole
  • themoeters
  • barometers

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  • تاریخ دریافت: 04 آبان 1398
  • تاریخ بازنگری: 03 بهمن 1398
  • تاریخ پذیرش: 17 اسفند 1398

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