北京太古宙水火之争  

The Neptunism vs Plutonism on the Origin of Archean Rocks in Beijing

作　　者：卢惠华[1] 李修平[1] LU Huihua;LI Xiuping(The Municipal Bureau of Land and Resources, Beijing 100013)

机构地区：[1]北京市国土资源局,北京100013

出　　处：《城市地质》2017年第1期42-49,共8页Urban Geology

摘　　要：北京太古宙地质研究工作已将近百年。前60年,水成派观点占统治地位;近30多年,火成派占了优势。争议的主要对象是沙厂英云闪长质片麻岩,争论的焦点集中在:矿体的形态和产状、块状无序的变质岩、岩浆岩对铁矿的影响、混合岩化、两群合一等五个问题上。放马峪基性岩墙群的出现,是中太古代晚期基性岩浆活动的一次标志性地质事件。不同观点的地质填图,各走极端。在以往工作的基础上,本文提出了北京太古宙岩石地层单位划分表,推出了本区太古宙岩石地层三分方案。The study on the Archean rocks in Beijing has lasted near 100 years. The first 60 years it was dominated by the neptunist point of view; while in the later more than 30years the plutonism became predominant. The major topic of debate is the origin of the tonalitic gneiss developed in Shachang. The focus of the conflict is concentrated at the 5 issues: the form and mode of occurrence of the iron ore bodies, the massive disordered metamorphic rocks,the magmatism, the migmatization and the combination of the two major rock groups. The intrusion of Fangmayu basic dyke swarm is an key important geological event in Late Mesoarchaeozoic time. The results of regional geological survey have gone extreme due to different points of view. Based on the long term iron ore exploration in this area, the present paper puts forward a new three-fold variant on the subdivision of Archean lithostratigraphic units.

关 键 词：太古宙 片麻岩 混合岩化 基性岩墙群 地层划分 北京 

分 类 号：P534.2[天文地球—古生物学与地层学]