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在分析太湖地区岩石密度特征的基础上指出，太湖穹窿内一些隆升区的重力低值是由于上部低密度志留系的分布和深部低密度浅变质岩的叠置增厚引起；研究区花岗岩密度中等（ρ＝２．６２ｇ／ｃｍ３），因此，它不是引起重力低值的原因。磁性资料表明，太湖地区油气目的层和区域盖层属于无磁或微磁性，最有利的油气构造应该分布在磁异常低值区；花岗岩具有中等偏弱磁性，闪长岩、凝灰岩具有强磁性。结合地质和其它地球物理资料，本文指出了穹窿内三个寻找下古生界油气最有利的构造，并对其深部构造形态进行了研究
Based on the analysis of the rock density characteristics in Taihu Lake area, it is pointed out that the low gravity of some uplifted areas in the Taihu dome is caused by the distribution of the upper low-density Silurian and the overlying thickening of the low-density shallow metamorphic rocks in the study area. The density is medium (ρ = 2.62g / cm3), so it is not the cause of low gravity. The magnetic data show that the hydrocarbon-bearing and caprock layers in the Taihu Lake region belong to non-magnetic or micro-magnetic, and the most favorable oil and gas structures should be distributed in areas with low magnetic anomalies. Granites have medium-weak magnetic, diorite and tuff with strong magnetism. Combined with the geology and other geophysical data, this paper points out that the three most favorable structures to search for the Lower Palaeozoic oil and gas in the dome and the study of its deep structure