کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8915251 | 1641040 | 2017 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Conditions of metamorphism of garnet-bearing aluminous gneisses in the Orekhov-Pavlograd zone of the Ukrainian Shield
ترجمه فارسی عنوان
شرایط دگرگونی گنایس های آلومینیم گارنت در ناحیه اورخوف و پگولراد سپر اوکراینی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
Garnet-bearing aluminous gneisses in the Vasil'kovka area of the Orekhov-Pavlograd zone of the Ukrainian Shield were studied using the THERIAK-DOMINO, THERMOCALC, and WINTWQ software and mineral geothermobarometry methods. The stability fields of parageneses formed at the initial, peak, and post-peak metamorphic stages have been estimated: T = 500-650 °C and P > 7 kbar, T = 800-850 °C and P - 8 kbar, and T = 600-670 °C and P = 4.0-5.5 kbar, respectively. A “clockwise” PT path has been established. Based on the aluminous gneiss, the age of metamorphism is determined as Paleoproterozoic (2014 ± 11 Ma). Unique regularly oriented acicular goethite microinclusions were described in garnet. In contrast to other known oriented Ti-bearing mineral inclusions in garnet, these goethite inclusions suggest not only extremely high P and T values (necessary for the formation of oriented Ti-bearing inclusions) but also a high oxygen fugacity. The obtained data broaden the concepts of the ways and conditions of formation of regularly oriented mineral phases in garnet.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Russian Geology and Geophysics - Volume 58, Issue 11, November 2017, Pages 1333-1348
Journal: Russian Geology and Geophysics - Volume 58, Issue 11, November 2017, Pages 1333-1348
نویسندگان
Sh.K. Baltybaev, A.V. Yurchenko, S.B. Lobach-Zhuchenko, V.V. Balagansky, O.L. Galankina, M.V. Morozov, E.S. Bogomolov,