山东省前寒武纪地层形成时代——同位素地质测年的证据  

Formation of Precambrian Strata in Shandong Province——Isotopic Dating Evidences

作　　者：王世进[1] 万渝生[2,3] 宋志勇[1] 杨恩秀[1] 董春艳[2,3] 王伟[4] 

机构地区：[1]山东省地质调查院,山东济南250013 [2]中国地质科学院地质研究所,北京100037 [3]北京离子探针中心,北京100037 [4]中国科学院地质与地球物理研究所,北京100029

出　　处：《山东国土资源》2011年第11期1-6,共6页Shandong Land and Resources

摘　　要：精确同位素地质测年结果表明,沂水岩群形成时代为2 760～2 700Ma,泰山岩群雁翎关岩组、柳杭岩组下亚组和孟家屯岩组形成时代为2 750～2 700Ma,均属新太古代早期;泰山岩群柳杭岩组上亚组、山草峪岩组形成时代为2 600～2 540Ma(被峄山岩套石英闪长岩和傲徕山岩套二长花岗岩侵入),济宁岩群岩浆锆石年龄(2 561±24)Ma,均属新太古代晚期。荆山群和粉子山群的形成时代为古元古代晚期。芝罘群碎屑锆石U-Pb年龄(1 658±32)Ma、(1 792±43)Ma,形成时代为中元古代。云台岩群花果山组碎屑锆石U-Pb年龄800～740Ma,形成时代为新元古代。As showed by precise isotopic dating results,Yishui group was formed in the 2760~2700Ma,while Yanlingguan formation in Taishan group,Xiayazu formation and Mengjiatun formation in Liuhang group were formed in 2750~2700Ma.They all belong to early period of Neoarchean.Shangya formation and Shancaoyu formation of Liuhang formation in Taishan group were formed in 2600~2540Ma（intruded by quartz diorite rock units in Yishan rock group and monzogranite in Aolaishan rock group）,while zircons ages of Jining group was（2561±24）Ma.They all belong to the late Archean.The formation period of Jingshan group and Fenzishan group is late Paleoproterozoic.Detrital zircon U-Pb age of Zhifu group was（1658±32） Ma and（1792±43）Ma.They were formed in the Mesoproterozoic.Detrital zircon U-Pb age of Huaguoshan group is 800~740Ma,and was formed in the Neoproterozoic.

关 键 词：前寒武纪地层 形成时代 同位素地质测年 山东省 

分 类 号：P534.1[天文地球—古生物学与地层学] P533[天文地球—地质学]