地质通报2017，Vol.36Issue(11)：1927-1941,15.
华北克拉通太古宙典型地区栖霞县幅1:5万地质图修编——野外地质调查和SHRIMP锆石U-Pb定年
Early Precambrian evo-lution of the Qixia area, eastern North China Craton: Evidence from geological mapping and SHRIMP U-Pb zircon dating
摘要
Abstract
Qixia is a typical area of Early Precambrian basement in eastern Shandong, North China Craton. Many TTG rocks were once considered to be supracrustal rocks (the Jiaodong Group), and the formation ages of the rocks have only been determined in a few outcrops in the original geological map (1:50000) of the area. In this study, the authors carried out geological mapping and SHRIMP U-Pb zircon dating on more than 30 samples in order to determine the temporal and spatial distribution of the TTG rocks. In the newly compiled geological map (1:50000), the main rock types of the Archean basement are tonalite gneisses with ages~2.9Ga, ~2.7Ga and ~2.5Ga and some local trondhjemite gneisses of the same ages. Supracrustal rocks of ~2.9Ga and ~2.5Ga (the Huangyadi supracrustal rocks and the Jiaodong Group) are very rare. All of the rocks roughly extend in a NWW-SEE direction, probably as a result of the strong late Neoarchean and late Paleoproterozoic tectonothermal events.关键词
胶东/TTG/太古宙/地质填图/SHRIMP锆石U-Pb定年Key words
eastern Shandong/TTG/Archean/geological mapping/SHRIMP zircon U-Pb dating分类
天文与地球科学引用本文复制引用
万渝生,刘敦一,宋志勇,王来明,颉颃强,刘守偈,侯建华,董春艳,谢士稳,白文倩..华北克拉通太古宙典型地区栖霞县幅1:5万地质图修编——野外地质调查和SHRIMP锆石U-Pb定年[J].地质通报,2017,36(11):1927-1941,15.基金项目
中国地质调查局项目《华北克拉通东部古陆块的形成演化及立典地区1:5万专题填图》(编号:DD20160121-03和《中国太古宙地壳形成与演化综合研究》(编号:121201102000150012) （编号:DD20160121-03和《中国太古宙地壳形成与演化综合研究》(编号:121201102000150012）
