Petrography and petrogenesis of igneous rocks attributed to Proterozoic within Ahangaran- Qayen area
Author(s):
Abstract:
The study area is located in Southern Khorasan Province, about 90 Km southeast of Qayen and 120 Km northeast of Birjand. The oldest rocks in this area, which are attributed to Proterozoic, consist of volcanic rocks and intrusive bodies with no sign of thermal metamorphic in volcanic rocks. Volcanic rocks include basalt, trachy-andesite and dacite, which have been metamorphosed to green schist facies. The compositions of the intrusive bodies attributed to Proterozoic ranges are diorite to granite. The magmatic nature of old volcanic rocks is mostly tholeiitic as these rocks in the area show a tholeiitic trend, and from thetectonomagmatic environment they belong to the tholeiitic oceanic island arcs. The magmatic nature of these intrusive bodies is sub-alkaline and the magma is of calc-alkaline type, therefore their tectonic settings belong to continental arc granite. These rocks in the studied area formed within active continental margin as a result of subduction phenomenon.
Language:
Persian
Published:
Iranian Journal of Geology, Volume:4 Issue: 14, 2010
Pages:
33 to 47
magiran.com/p981059
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!