华北板块北缘东段拼贴带地质-地球物理特征  

The geologic - geophysical characteristics of matching zone on the east part of northern margin of North China platform

作　　者：郭孟习[1] 尹国义 彭玉鲸[1] 孙炜[2] 

机构地区：[1]吉林地勘局区域地质矿产调查所,吉林长春130022 [2]吉林省地质科技情报研究所,吉林长春130061

出　　处：《吉林地质》1999年第4期8-18,共11页Jilin Geology

摘　　要：华北板块北缘东段(吉林省境内)地质构造的研究历来为学者所关注,研究成果颇多。笔者通过最新的地质-地球物理资料的分析研究,认为:该带重磁场的总体特征,即近东西向展布的地球物理场态,被北东向或与之相联系的其它方向的重磁场带或梯度带分隔、切割、干扰和改造;区域构造框架——古东西向构造,为中生代北东向等构造改造、包容及其它各种复合关系,具有较高的一致性。通过对该带划的5个构造重磁场区段之一的富尔河区段的剖析,确证重磁场的内部结构与地质构造要素的空间组合——断裂及为断裂所挟持的条块区的物质组成,具有相互对应的关系。依据重磁场综合削面对深部构造解释成果,探讨了表层与深部构造的关系,提出了“雪橇型”构造模型的初步认识和进一步研究的重要意义。从而较为完整、概括地阐明了华北板块北缘东段拼贴带的地质-地球物理特征。The geologists are concerned follow with interest the research for geological structure on the east part of northern margin of North China platform (the part of Jilin province), and many results were achieved. Through analysis and research of the latest geologic - geophysical data, the characteristics of the magnetic field in this belt show that the EW - trending geophysicalfield is separated, cut, disturbed and transformed by the magnetic fields and gradient belts of NE -trending or other related directions. They are in high accordance with the regional structural framework - aleostructure of WE striking and with the Mesozoic structural reworking of EN striking etc,. Through the analysis for the Fuerhe part, one of 5 structural gravity magnetic fields in this belt. We confirm that the internal structure of gravity magnetic field and the spatial assciation of geologic structural essential elements - fault and faulted mass assemblage have a correlation. According to the composite profile of gravity field and the interpretative results of the deep structures, the relationship between the superstructure and deep - seated structure is discussed. A 'the sledge type' structural model is proposed, indicating a great significance for the further research.

关 键 词：地球物理 地质构造 拼贴带 华北板块 北缘东段 

分 类 号：P542.4[天文地球—构造地质学] P313[天文地球—地质学]