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The Sariwon sills are distributed in the Pyongnam basin at the center of the Korean peninsula, eastern part of the North China Craton. These sills are up to 150m in thickness and up to more than 10km in length. Baddeleyite grains separated from a ~50m thick sill give a SIMS 206 Pb– 207 Pb age of 899±7Ma (MSWD=0.34, n=14), which is interpreted to be the crystallization age of this sill...
New single zircon SHRIMP U–Pb dating of paragneiss and garnet-bearing granite from the Mashan Complex in the Jiamusi Massif at Sandaogou and Xi Mashan, Heilongjiang Province, China, indicates that these rocks underwent granulite facies metamorphism ∼500Ma ago. Sillimanite gneiss from Sandaogou contains a single population of metamorphic zircons which have a 206 Pb/ 238 U age of 496±8Ma...
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