黔北松林穹隆形成机制及演化

为探讨黔北松林穹隆的形成机制和构造形迹演化，对松林穹隆各部位测量的节理进行分期配套和应力场分析，认为松林穹隆雏形为早期形成的一个古基底隆起，历次构造运动使古隆起经历了不断隆升→沉降→隆升的复杂过程，而燕山运动时受到的两期应力，即早期南东方向朝北西方向的挤压应力和晚期北西和南东方向的挤压应力，是松林穹隆得以强化并趋向复杂化的最根本的地应力因素，并对该区构造的发生、发展有着一定的影响和控制作用.

FORMING MECHANISM AND EVOLUTION OF THE SONGLIN DOME IN NORTHERN GUIZHOU PROVINCE

In order to study its forming mechanism and evolution of structural features,the stress field of Songlin dome in Northern Guizhou Province is analyzed with stage division and matching for the surveyed joints in each position of the dome.The result shows that the Songlin dome was formed from an early uplift on ancient basement.The historical tectonic movements caused to the complicated procedures of continuous uplifting → subsidence → uplifting.During Yanshanian movement,this area experienced two stages of stresses.The first was compression from southeast to northwest.The second was compressive stress between northwestward and southeastward.These stresses not only essentially strengthen and complicate the Songlin dome,but also impact and control the formation and development of regional structures.