CHIME (chemical Th-U-total Pb isochron) geochronology were made for Precambrian rocks from Goseong-Ganseong area, northeastern part of the Gyeonggi massif. Zircon and/or monazite grains from orthogneisses give $1672{pm}69;to;1414{pm}36Ma$ ages, and monazite grains from paragneisses yield similar ages ranging from $1703{pm}70;to;1395{pm}97Ma$ suggesting that $1.7{sim}1.4Ga$ igneous intrusions and coeval metamorphisms were occurred over the area. Together with reported prevailing $1.9{sim}1.8Ga$ igneous activities and regional metamorphism from the Cyeonggi massif, our age data from Goseong-Ganseong area would be potentially correlated with long-lived $(1.8{sim}1.3Ga)$ global tectonotermal events in marginal outgrowth of supercontinent Columbia which was finally assembled by collisional orogenies at ${sim}1.8Ga$. Petrological and geochmical studies, however, should be followed to confirm this tectonic interpretation.