کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5786889 1414144 2017 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geochemistry of Precambrian volcanosedimentary rocks of the Karsakpai Group in southern Ulutau (Central Kazakhstan)
ترجمه فارسی عنوان
ژئوشیمی سنگ های آتشفشانی پرکامبرین گروه کراسپاپی در جنوب یولوتو (قزاقستان مرکزی)
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی
We have analyzed the isotope-geochemical features of volcanosedimentary rocks of the Karsakpai Group in southern Ulutau (Central Kazakhstan): mafic volcanics, siliceous and siliceous-ferruginous sediments, and quartz-sericite-chlorite schists. The close association of ferruginous quartzites with intraplate volcanics indicates that they formed in a tectonically active basin. The Nd isotope composition of ferruginous quartzites was governed by synchronous underwater volcanism, whereas the 143Nd/144Nd value of schists was additionally controlled by the Nd isotope composition of older sources. The Mesoproterozoic Nd model ages and positive εNd(t) values of the metaterrigenous rocks of the Karsakpai Group indicate the presence of Mesoproterozoic juvenile material in the provenance. The minimum Nd model ages suggest the lower boundary of sedimentation of 1.3 Ga.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Russian Geology and Geophysics - Volume 58, Issue 8, August 2017, Pages 935-948
نویسندگان
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