Mesoproterozoic magmatic suites from the central-western Korean Peninsula: Imprints of Columbia disruption in East Asia

摘要: Abstract Middle Mesoproterozoic rift-related magmatisms of mantle plume origin are global interest in understanding the breakup Columbia supercontinent. Here we investigate age-equivalent basement rocks along western marginal areas northwestern Gyeonggi Massif central-western Korean Peninsula. The sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon ages late mafic dykes and monzonitic intrusions from Dongman Island early Late syenites Kimpo area show 1259 ± 12 Ma, 1222 ± 9 Ma, 1197 ± 5 Ma, 1194 ± 6 Ma, respectively, suggesting multiple magmatic pulses. characterized by A1-type granite affinity, formed continental rifts. characteristics transitional composition between tholeiitic-alkaline basalts to alkaline basalt having geochemical affinity OIB (WPB) derived enriched sources, indicating a origin. data presented this work, together with previous lithological, geochemical, geochronological information on suites margin provide important insight into rift setting at ca. 1259–1194 Ma, broadly coeval hotspot track identified Laurentia, North China Craton Baltica, providing imprints disruption Northeast Asia.