论区域航磁异常与我国东部深部地质构造的关系——地质解释之一

一、前言 1979年6月地质矿产部航测总队出版了《中国航空磁力异常△T图》,该图范围包括我国东北、华北和部分华东地区（即经度102°以东、纬度32°以北地区）。并对我国东部陆地及大部分海域的航空磁力异常作了统一调平工作。我们收集了上述资料及部分中国海域及其毗邻海域（下称邻海）的磁测资料。做出了一张经过调平的中国东部及其邻海航空磁力异常△T图。并采用画航磁异常轴向这个最简单的方法,画出具有客观性和直观性的航磁异常轴向图,进行地质解释,提出研究结果,介绍了研究的方法,力争从这一航磁异常轴向图中提出更多的地质信息。在这以前,朱英发表了《华北地块的大地构造和鞍山式铁的矿分布规律——根据航空磁测结果的初步分析》。侯重初、刘寿彭等作了《泛华北地区航磁资料数据处理结果与初步地质解释》。姜枚作了磁特征线的研究等工作。

ON THE RELATIONSHIPS BETWEEN REGIONAL AEROMAGNETIC ANOMALIES AND DEEP GEOLOGICAL STRUCTURES IN EASTERN CHINA

A study of deep structures in the earth’s crust in eastern China has been made through an analysis of the characteristics of the axial distribution of aeromagmatic anomalies. On that basis a tectonic framework called the axial tectonic framework,different axial patterm units called magnetic tectonic units and features reflecting deep structures in the earth’s crust called axial tectonic features have been delimited. Besides,the paper also discusses the crustal movements and evolution in eastern China and the laws governing the occurrence of energy resources such as oil,coal and hot springs. The axial tectonic framework consists of three E-W-trending axial tectonic belts and two NE-trending and two NNE-trending axial tectonic lines,extemding through eastern China. Besides,there are also some regional axial tectonic framework lines. These axial tectonic belts and lines control the crustal movements in eastern China. Seven magnetic tectonic units are distinguished,namely,the Northeast China,North China,Qinling,Yangtze,South China,East China Sea and South China Sea regions. In each region the relationships between the axial pattern and the deep structures have been studied intensively and several magnetic tectonic subunits have been further distinguished.