شیمی کانی‌ها و دما–فشارسنجی توده‌های نفوذی خریل-کلاسور (جنوب غرب کلیبر- شمال غرب ایران)

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه زمین‌شناسی، دانشکده علوم طبیعی، دانشگاه تبریز، تبریز، ایران

چکیده

گرانیتوئید خریل- کلاسور به سن الیگوسن، در جنوب غرب شهرستان کلیبر، شمال غرب ایران در کمربند ماگمایی البرز – آذربایجان رخنمون دارد. توده‌های نفوذی منطقه درون سنگ‌های آتشفشانی- رسوبی کرتاسه تزریق شده­اند. ترکیب سنگ‌شناسی توده‌ها شامل گابرو- دیوریت، دیوریت، کوارتز مونزودیوریت و گرانیت است. کانی­های اصلی تشکیل دهنده توده‌های گابرو- دیوریتی و دیوریتی شامل پلاژیوکلاز، کلینوپیروکسن، آمفیبول و بیوتیت بوده و در توده کواراتز مونزودیوریتی پلاژیوکلاز، فلدسپار پتاسیم، کوارتز، آمفیبول و بیوتیت هستند. بررسی شیمی کانی‌ها نشان می‌دهد که ترکیب کلینوپیروکسن‌های سنگ‌های منطقه از نوع دیوپسید است. آمفیبول‌های منطقه در گروه کلسیمی قرار دارند. آمفیبول‌های کلسیمی نشان می­دهند که سنگ‌های منطقه مورد بررسی از نوع  گرانیتوئیدهایI  هستند. آمفیبول‌های توده­های خریل- کلاسور ترکیب مگنزیوهورنبلندی دارند. بیوتیت‌های سنگ‌های منطقه دارای نسبت Fe/(Fe+Mg) بیش از 33/0 و از منیزیم غنی هستند. فلدسپار در سنگ‌های گرانیتی با ترکیب آلبیت- الیگوکلاز و در سنگ‌های دیوریتی و کوارتز مونزودیوریتی دارای ترکیب آندزین، لابرادوریت و ارتوکلاز است. بر اساس شیمی کانی‌های بیوتیت، آمفیبول و  بیوتیت ماگمای مولد سنگ‌ها سرشت آهکی قلیایی داشته و در محیطی وابسته به فرورانش شکل گرفته است.    

کلیدواژه‌ها

عنوان مقاله [English]

Mineral chemistry and thermobarometry of Kharil-Klasur intrusive rocks (SW Kaleybar

نویسندگان [English]

  • sadiqeh sadri
  • Nasir Amel
  • Mohsen Moayed
Department of Geology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
چکیده [English]

The kalasur_Kharil granitoid complex with Oligocene age, is located in SW Kaleybar of NW Iran, Alborz-Azarbaijan zone. The rocks  are  intruded into the Cretaceous  volcanic and sedimentary rocks. The composition of plutonic rocks are consist of  gabbro-diorite, diorite, quartz monzodiorite and granite. The major minerals in gabbro-dioritic and dioritic rocks are plagioclase, clinopyroxene, amphibole, biotite and major minerals in quartz monzodioritic and granitic rocks are‌ potassium feldspar, plagioclase, quartz, amphibole and biotite. On the basis of mineral chemistry, the composition of clinopyroxenes is in diopside range. Amphibole minerals are calcic in study area. The calcic amphiboles indicates that the rocks of the studied area belong to type I granitoids. The Khari- Kalasour amphiboles are magnesio hornblende. The biotite in Kharil- Kalasur granite with Fe/(Fe+Mg)>3 is magnesio-biotite. The feldspar composition is albite-andesine in granite, labradorite, andsine and orthoclase in dioritic and quartz monzodioritic rocks. Mineral chemistry of the biotite, amphiboles and pyroxenes indicate that this rocks are calc-alkaline and have been crystallized in a subduction zone setting.

کلیدواژه‌ها [English]

  • Mineral chemistry Kharil-Kalasur
  • calc-alkaline
  • I-type
  • Alborz-Azarbaijan

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  • تاریخ دریافت: 18 شهریور 1402
  • تاریخ بازنگری: 23 مهر 1402
  • تاریخ پذیرش: 10 آبان 1402

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