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We investigated the Sm-Nd isotopic characteristics of the Gyeonggi massif, Korea, in order to delineate its crustal growth history. Nd isotopic depleted-mantle model ages (T DM ), obtained from 32 new measurements of basement and supracrustal samples and from the literature, suggest that the Gyeonggi massif is as old as Middle Archean (>3.0Ga) and was primarily extracted from the mantle...
Geology and tectonics of the Korean Peninsula have been considered to be closely associated with those of the adjacent Chinese continent. Although Phanerozoic connections between the two areas have been reasonably well worked out, Precambrian ones are less well established. We obtained Sm-Nd and U-Pb garnet ages of 12 metamorphic rocks from widely separated parts of the Gyeonggi and Yeongnam massifs...
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