作者: Aleksandr V. Samsonov , Dmitriy Z. Zhuravlev , Yelena V. Bibikova
DOI: 10.1080/00206819309465582
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摘要: Geological and isotope-geochemical studies of acid volcanics in the Verkhovtsevo greenstone belt surrounding tonalite-trondhjemite plutons within central Dnieper gneiss-green- stone terrain were conducted search for genetic relationships increased understanding petrogenesis melts. The volcanic plutonic rocks are similar mineral composition form a unified calc-alkaline-like trend from dacite/tonalite to rhyolite/ trondhjemite. Dacites tonalites have same rare-earth element (REE) patterns with moderately fractionated light heavy REE as well small negative Eu anomalies. Rhyolite trondhjemites less-fractionated larger Whole-rock data yielded single isochron 3117 ± 204 Ma, eNd = +1.14 0.80. suggest temporal relationship between sequences rocks; both appear bel...