کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4739353 1358435 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The Haraa Gol terrane in the western Hentiyn Mountains (northern Mongolia): geochemistry, geochronology, and geodynamics
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
The Haraa Gol terrane in the western Hentiyn Mountains (northern Mongolia): geochemistry, geochronology, and geodynamics
چکیده انگلیسی

According to geological, petrological, geochemical, and geochronological studies, the Haraa Gol terrane in the western Hentiyn Mts. is dominated by two rock assemblages of different ages, associated with the initiation and development of the island arcs and marginal spreading seas of the Mongol–Okhotsk Ocean. The Late Cambrian, Early Ordovician, and Middle Ordovician were marked by the effusion of basalt and basaltic andesite and the formation of gabbro and gabbro-dolerite in back-arc spreading basins. In the Late Silurian–Devonian, after a short pause, tectonomagmatic processes were activated, with the formation of differentiated island-arc volcanics, gabbro, and granitoids. Their absolute 40Ar–39Ar age is given in the paper. The model age of the TNd(DM) protolith of the Haraa Gol igneous rocks corresponds to the composition of the Mesoproterozoic juvenile crust.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Russian Geology and Geophysics - Volume 53, Issue 3, March 2012, Pages 281-292