北祁连边麻沟粉砂岩碎屑锆石U-Pb年龄及Hf同位素特征
북기련변마구분사암쇄설고석U-Pb년령급Hf동위소특정
U-Pb ages and Hf isotopes of detrital zircons from siltstone,Bianmagou, North Qilian Mountains
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