Geochemistry and petrogenesis of plagiogranites in the Neyriz ophiolitic sequence, Iran: Constraints on their origin
Author(s):
Abstract:
Plagiogranite intrusive rocks are outcropped in the gabbroic section of the Neyriz ophiolitic sequence in the south east of Shiraz. Petrographically, they are comprised of tonalite, trondhjemite and their contact with surrounding gabbros is either sharp or covered. Predominant textures are hypidiomorphic inequigranular, granophyry and micrographic. Mineralogically, they are consisting of plagioclase, quartz, sodium feldspars as major minerals and less than 10% amphibole ± pyroxene, opaques and rarely titanite and zircon as minor minerals. Geochemical studies show that their magma is sub-alkaline type (calc-alkaline series) and metaluminous. Typologically, plagiogranites have characteristics of oceanic ridge granite (ORG) toward I-type granites. Chonderite normalized REE patterns of Neyriz plagiogranites show depletion in LREEs along with a flat HREE patterns and it seems that they were formed in supra-subduction zone environment by partial melting of mafic rocks which in turn were formed by the anatexis of a previously depleted harzburgitic mantle.
Keywords:
Language:
Persian
Published:
Petrology, Volume:3 Issue: 12, 2013
Page:
1
magiran.com/p1130289
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!