甘肃古浪地区石炭系羊虎沟组层内褶皱特征及其对煤层的控制作用

本文探讨的是见于甘肃古浪地区石炭系羊虎沟组含煤建造中普遍发育的层间褶皱特征、形成机制及其对煤层储聚的控制作用,研究发现石炭纪地层中的层内褶皱具有多方位的褶皱枢纽,具非共轴叠加褶皱形态,经历了早期B形和晚期A形褶皱演化过程,最终形成AB复合型褶皱,此类褶皱普遍控制了该套岩层中煤层的储聚。本文在分析了该类褶皱的几何形态特征及其变形控制条件的基础上,探讨了它的形成演化机制和控煤特征。

CONTROL ROLE OF INTRALAYER FOLD TO COAL SEAM WITHIN CARBONIFEROUS YANGHUGOU FORMATION IN GULANG OF GANSU PROVINCE

In the paper is it discussed interlayer folds developed widely within coal-bearing formation of Carboniferous Yanghugou Formation in Gulang of Gansu Province,as well formation mechanism,control role to accumulation of coal seam,the study reveal that the intralayer folds have fold hinges with multi-directions,and shape of non-coaxial superimposed folds,which underwent evolution periods of A type in the early and B type in the late,they are composite folds of A type and B type which controlled the accumulatio...