鲁西泰山岩群地层划分及形成时代——锆石SHRIMP U-Pb测年的证据  

Stratigraphic Division and Formation Era of Taishan Group in Luxi Area——Evidence of Zircon SHRIMP U-Pb Dating

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

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离子探针中心,北京100037 [3]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》2012年第12期15-23,共9页Shandong Land and Resources

基　　金：国家自然科学基金(41172172)资助

摘　　要：精确同位素地质测年结果表明,泰山岩群下部地层雁翎关岩组(含原柳杭组下亚组)岩浆结晶锆石SHRIMPU-Pb年龄(2 747±7)Ma,孟家屯岩组碎屑锆石内核SHRIMP U-Pb年龄(2 717±33)Ma、(2 742±23)Ma,均属新太古代早期,形成年龄为2 750～2 700Ma;泰山岩群上部地层山草峪岩组最年轻的碎屑锆石(2 544±6)Ma,被峄山岩套石英闪长岩和傲徕山岩套二长花岗岩侵入,它限制了地层形成时代不晚于2 530Ma,柳杭岩组(原柳杭组上亚组)最年轻的碎屑锆石(2 524±7)Ma,均属新太古代晚期,被峄山岩套石英闪长岩和傲徕山岩套二长花岗岩侵入,形成年龄为2 550～2 530Ma。As showed by precise isotope geological dating results, magmatic euhedral zircon SHRIMP U- Pb age of Yanlingguan formation （including lower sub-formation of the former Liuhang formation） in the lower part of Taishan group is （2747±7） Ma, detrital zircon kernel SHRIMP U-Pb age of Mengjiatun formation is （2717±33） Ma and （2742±23）Ma. They all belong to early Neoarchean period, and the for-mation age is 2750-2700Ma. The youngest detrital zircon of upper Shancaoyu formation in Taishan group is （2544±6） Ma. It is intruded by quartz diorite in Yishan rock suite and monzogranite in Aolaishan suite. It limits the strata forming age not later than 2530 Ma. The youngest detrital zircon of Liuhang group （the original upper sub-formation of Liuhang group） is （2524±7）Ma, and belongs to late period of late Ar-chean period. It is intruded by quartz diorite of Yishan rock suite and monzonite granite of Aolaishan rock suite. Its formation age is 2550-2530Ma.

关 键 词：泰山岩群 地层划分 形成时代 同位素地质测年 山东省 

分 类 号：P597.3[天文地球—地球化学]