内蒙古固阳福顺店一带渣尔泰山群褶皱构造研究

FOLD STRUCTURE OF ZHAERTAISHAN GROUP IN FUSHUNDIAN, GUYANG COUNTY, INNER MONGOLIA

通过区调填图对内蒙古固阳一带渣尔泰山群褶皱构造进行了分析研究 .在地质演化过程中 ,渣尔泰山群主要经历了 3期褶皱变形 ,即早期的层内褶皱 ,主期同斜倒转褶皱与晚期叠加褶皱 .早期褶皱形成于中元古代 ,系由层间的剪切滑动所至 ,主要发育于阿古鲁沟组 ;主期褶皱形成于中元古代 ,晚期褶皱形成于早古生代 ;主期与晚期褶皱均形成于纵弯褶皱机制 .由于晚期褶皱对主期褶皱的改造 ,形成了较为复杂的叠加构造网络 .

The regional geological mapping is used to analyze the fold structure of the Zhaertaishan Group in Guyang County, Inner Mongolia. In the geological evolution of the fold structure, this suite of strata experienced three stages of fold deformation: the intraformational fold in the early stage, the homoclinal reverse fold in the major stage, and the superimposed fold in the late stage. The intraformational fold that occurred in the Meso_Proterozoic and developed in the Agulugou Formation, was caused by the shear_slip between formations. The homoclinal reverse fold occurred in the Meso_Proterozoic. The superimposed fold in the late stage occurred in the Early Paleozoic. The latter two folds were both derived from the longitudinal folding mechanism. The restructuring of the fold in the major stage by the fold in the late stage resulted in the formation of a relatively complex superimposed structural network.