Origin and Paleoproterozoic Reactivation of Neoarchean High-K Granitoid Rocks in Eastern Finland |
Common terms and phrases
Archean sanukitoid suites augen gneiss area Beartooth Mountains biotite CA2-type calc-alkaline charnockites CHUR Closepet granite continental crust crust mixing line crustal deformed depleted mantle dislocation creep eastern Finland feldspar Figure fine-grained geochemical grain boundaries granulite Group L1 growth curve high Th/U high-grade metamorphism isochron isotope ratios Juankoski K-feldspar K-feldspar fractions K-feldspar isochron K-feldspar samples lead isotopic composition Lieksa area Lieksa granitoids Lieksa granodiorites lower crust magmas mantle-derived mantle-upper crust mixing matrix megacrysts microcline minerals model ages mylonitic Neoarchean Nilsiä and Lieksa Nilsiä augen gneisses Nilsiä Lieksa numbers orogene Paleoproterozoic Pb isotopic compositions Pb ratios Pb-Pb diagrams phenocrysts plagioclase plot porphyroclasts Proterozoic quartz radiogenic recrystallization REE patterns rocks S&K model shear zones Sm-Nd Stacey and Kramers Std.d strain Superior Province Svecofennian Table tectonothermal tion Tipasjärvi tonalite trace element undeformed upper crust uranium values Varpaisjärvi area Varpaisjärvi enderbites whole-rock samples x-error Z&D MANTLE Z&D model