滦平盆地上白垩统九佛堂组中的熔积岩及地质意义

Peperite in the Jiufotang Formation of the Luanping Basin and Its Geological Implications

通过对滦平盆地沉积地层的野外观察,系统分析了九佛堂组的沉积特征及其变化规律,鉴别出特殊的岩石类型——熔积岩;较详细的描述了熔积岩所在剖面的沉积特征,最后结合盆地的区域地质背景,初步认为滦平盆地为火山—沉积盆地,强烈的同沉积构造运动伴随岩浆活动,致使盆地九佛堂组沉积地层内发育熔积岩。

Based on observation in the field, this paper documents the sedimentary features and variations of Jiufotang Formation in the Luanping basin. A special kind of rock, namely, peperite, was identified and described in detail. Taking the geological setting of the basin into account, the author believes that the Luanping basin is a volcanic sedimentary basin. The intensive synsedimentary tectonic activity has resulted in the peperite in the Jiufotang Formation.