对南华褶皱系东西部磁性显著差异的认识

The cognition of the striking magnetic difference between the eastern and the western parts of Nanhua Fold System

华东石油地质局第六物探大队, 南京210009

The 6th Geophysical Exploration Party of East Bureau of Petroleum Geology, MGMR, Nanjing 210009

本文从岩石物性、地质及航磁△T磁场等特征出发,分析证实了南华褶皱系东西部存在显著差异,综合分析了造成这种差异的三种地质因素,推测东西部岩浆并非同源,对本区今后物探工作有一定的参考意义。

Starting from their characteristics of petrophysics, geology, aeromagnetic △T and so on, we analyse and confirme the existence of the striking magnetic difference between the eastern part and the western part in Nanhua Fold System. Three kinds of geologic factors which result in the magnetic difference are discussed. From our analysis we infer that the magmata in the eastern part and in the western part have different origins. And so this cognition is meaningful for our exploration activities in this area.