中性三角区(neutral triangulation avea)是一非常独特的构造形态,研究中性三角区,对构造地质学理论,特别是褶皱问题,以及矿产、油气预测等均有积极意义。中性三角区是指发育于褶皱构造中,周边被三组式样独特的劈理(或片理)围限,其内部应变值为零或很小的拟三角形区域。其三维空间形态为拟三棱柱体。在紧靠强岩层褶曲外 The neutral triangulation avea is a very unique tectonic configuration. The study of neutral triangles is of positive significance to the tectonic geology theory, especially to the fold problem, as well as to mineral and hydrocarbon prediction. Neutral triangular area is developed in the fold structure, surrounded by three groups of unique patterns of cleavage (or film), the internal strain value is zero or very small quasi-triangular area. Its three-dimensional space shape is quasi-triangular prism. Close to strong rock fold outside