| 胶北地块前寒武纪基底研究新进展 |
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| 引用本文： | 徐扬,冯岩,李日辉.胶北地块前寒武纪基底研究新进展[J].现代地质,2011,25(5):965-974. |
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| 作者姓名： | 徐扬 冯岩 李日辉 |
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| 作者单位： | 1. 国土资源部海洋油气资源与环境地质重点实验室,山东青岛266071;青岛海洋地质研究所,山东青岛266071
2. 中国地质大学能源学院,北京,100083 |
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| 基金项目： | 国土资源部海洋区域地质调查项目 |
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| 摘 要： | 胶北地块位于鲁东的沂沭断裂和五莲—烟台断裂之间,以出露不同变质程度的太古宙—古元古代的结晶基底为特征,其岩石组合为TTG质(英云闪长岩-奥长花岗岩-花岗闪长岩)片麻岩和少量变质表壳岩(变质火山岩-变质沉积岩),它们构成了胶北的花岗-绿岩体。对变质(超)基性岩、TTG岩系的岩石组合、地球化学特征和同位素年代学的研究表明,胶北地块造壳的主要时期为新太古代的2.8～2.7 Ga;在经历了2.5 Ga左右构造事件后,胶北地块进入稳定陆壳沉积阶段,并接受了古元古代的孔兹岩系沉积;最后于1.8 Ga左右发生变质。与苏鲁造山带不同,胶北地块前寒武纪基底具有许多亲华北板块的特征,二者的界线可能是五莲—烟台断裂。
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| 关 键 词： | TTG 变质(超)基性岩 前寒武纪基底 胶北地块 |
Main Progresses in the Study of Precambrian Basement of Jiaobei Terrane, Eastern China |
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| XU Yang,FENG Yan,LI Ri-hui.Main Progresses in the Study of Precambrian Basement of Jiaobei Terrane, Eastern China[J].Geoscience——Journal of Graduate School,China University of Geosciences,2011,25(5):965-974. |
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| Authors: | XU Yang FENG Yan LI Ri-hui |
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| Institution: | XU Yang1,2,FENG Yan 3,LI Ri-hui1,2 (1.Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology,Ministry of Land and Resources,Qingdao,Shandong 266071,China,2.Qingdao Institute of Marine Geology,3.School of Energy Resources,China University of Geosciences,Beijing 100083,China) |
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| Abstract: | The Jiaodong terrane located between Yishu fault and Wulian-Yantai fault in eastern Shandong Pro-vince,is characterized by an Archean to Paleoproterozoic crystalline basement experienced different degrees of metamorphism traditionally.Its assemblage includes TTG(tonalitic-trondhjemitic-granodioritic) gneisses and a little supracrustal rocks(metavolcanite and metasedimentary),which combined to granite-greenstone belts of Jiaodong terrane.The research of lithological,geochemical,geochronological data indicate... |
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| Keywords: | TTG ultra basic-basic metamorphic rock Precambrian basement Jiaobei terrane |
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