Geochemistry and U-Pb zircon geochronology of Late-Mesozoic lavas from Xishan, Beijing

Abstract  Zircon U-Pb dating by both SHRIMP and LA-ICP-MS and geochemical study of the Tiaojishan Formation and the Donglintai Formation from Xishan, Beijing, reveal that ages of upper lavas of Tiaojishan Formation and Middle of Donglint