摘要
推覆、滑脱构造为福建省主要控煤构造,但在其南、北两段含煤区的表现迥然不同。北段滑脱强度大,为大规模由隆起向坳陷(由西向东)逆冲的推覆构造型式,而南段滑脱强度相对较小,为两侧向向斜中部对冲的推覆构造型式。究其原因,除公认的软硬岩层相间、隆起坳陷的位能差异原因外,还认为北段的宽缓波状带、南段的向背斜序列带以及北西走滑性断裂的分割作用是造成该推覆、滑脱活动迥异的基本因素。研究这些规律,对福建省新一轮找煤工作有重要的指导作用。
The decollement structure is the main coal controlling structure in the Fujian Province, but its manifestations in south and north sectors of the coal-bearing area are quite different. In the north sector, decollement has larger intensity, and appeared as extensive nappes thrusting from uplift toward depression （from west to east）; while the south sector has lesser intensity, and appeared as nappes ramping from both sides of syncline toward the center. To examine the causation, besides the generally accepted potential energy differences between alternative soft and hard strata, uplift and depression, still considered that the wide and gentle undulating zones in the north sector, syncline-anticline succession zones in the south sector as well as segmentation of NW strike-slip faults are the basic factors caused the quite different thrusting and detaching activities. To study the regulations has major guiding significance for new coal looking in the province.
出处
《中国煤炭地质》
2009年第2期6-9,共4页
Coal Geology of China
关键词
闽中南坳陷
推覆滑脱构造
宽缓波状带
向背斜序列
北西向断裂
central south Fujian depression
nappe decollement structure
wide and gentle undulating zone
syncline-anticline succession
NW faults
