Petrology and geochemistry of gabbros in the Baft ophiolitic mélange; southwest of Kerman
Author(s):
Abstract:
Baft ophiolitic melange, as a part of ophiolitic melange belt of the Central Iran, is adjacent to Urumieh-Dokhtar magmatic assemblage in the north and Sanandaj-Sirjan metamorphic zone in the south. The ophiolitic complex has been emplaced in the Late Cretaceous time as a result of closure of Nain-Baft oceanic basin. The gabbros are the main constituent of the complex and occur as large intrusive bodies showing isotropic and rarely layered structures with hypidiomorphic granular to pegmatitic textures. The color index varies from melanocratic to lesser extent mesocratic and leucocratic. Geochemical studies reveal that gabbros are tholeiitic to calc-alkaline, low-Ti in nature and show similarity to N-MORB. The chondrite-normalized rare earth elements patterns are almost flat with slight enrichment in LREEs relative to HREEs which indicates a similarity in their origin. It seems that gabbros were derived from a depleted refractory mantle source in a subduction zone setting.
Keywords:
Language:
Persian
Published:
Journal of New Findings in Applied Geology, Volume:9 Issue: 17, 2015
Pages:
43 to 55
magiran.com/p1445062
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!