U-PB AGE OF GRANITOIDS IN THE JUNCTION ZONE BETWEEN THE OLEKMA GRANITE-GREENSTONE AND ALDAN GRANULITE-GNEISS TERRANES

U-PB AGE OF GRANITOIDS IN THE JUNCTION ZONE BETWEEN THE OLEKMA GRANITE-GREENSTONE AND ALDAN GRANULITE-GNEISS TERRANES

Salnikova E.B.; Kotov A.B.; Belyatskii B.V.; Yakovleva S.Z.; Morozova I.M.; Berezhnaya N.G.; Zagornaya N.Yu.
xmlui.dri2xhtml.METS-1.0.item-citation: Stratigraphy and Geological Correlation, 1997, , 2, 101-109
Date: 1997

Abstract:

U-Pb dating of zircons from the reference granitoid complexes showed that principal thrusts in the northern flank of the junction zone between the Olekma granite-greenstone and Aldan granulite-gneiss terranes of the Aldan Shield were formed 1962 ± 5-2398 ± 4 Ma ago. The oldest structural and metamorphic transformations affected the nonstratified infracrustal complex 3005 ± 4 Ma ago. These data substantiate the reliable correlation of structural units with the geochronological scales previously elaborated for the northern flank and adjacent areas of the Olekma granite-greenstone and Aldan granulite-gneiss terranes.

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