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地质论评 1980
冀东太古界麻粒岩相岩石中锆石的同位素年龄Abstract: U-PbisotopicagedeterminationsarereportedforzirconfractionsfromatonalitegneissfromKuoTsiaKouandaretrogressedtwo-pyroxenegranulitefromTaipingzhaiintheEastHopeiProvinceofNorthChina.AlthoughthezirconU-PbsystemsareslightlydiscordantthelineardistributionofPb/Upointsonaconcordiaplotindicatesthatzirconpopulationsfrombothrockshaveanageof2480±20Ma.ThisisinterpretedastheageofthegranulitefaciesmetamorphismwhichaffectedtheArchaeanrocksofEastHopeiProvince.
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