广西区域岩石物性特征及其地质意义

广西区域岩石物性调查,给出了区域岩石的密度、磁性、电性特征及其时空分布规律,划分了密度界面,明确了磁性基底的客观存在,构思了岩石层序地球物理模型,提出了不同时代花岗岩的磁性变化特征,建立了隐伏在岗岩的重力低预测模式.在区域构造填图、隐伏花岗岩填图、小盆地油气田构造研究、固定矿产成矿带预测以及某些基础地质研究等方面,具有重要意义.

REGIONAL PHYSICAL PROPERTIES OF ROCKS IN GUANGXI AND THEIR GEOLOGICAL SIGNIFICANCE

Through regional investigation of physical properties of rocks in Guangxi, the authors have determined the density, magnetism, electric characteristics and temporal-spatial distribution of regional rocks, disclosed the boundary separating different densities, made clear the existence of magnetic basement, worked out a geophysical model for stratigraphic sequence of rocks, indicated magnetic variation characteristics of granites of different ages, and established a pregnostic model for gravity low of concealed granites. These achievements will be surely of great significance in such aspects as regional structural mapping, concealed granite mapping, study of oil-gas structures in small basins, prognosis of solid ore minerogenic belts and basic geological research.