摘要
根据层序地层研究 ,华北石炭二叠纪沉积建造形成于一个二级海平面变化周期内 ,其中包括 4个三级和 2 6个四级海平面变化旋回 ,而几次大的聚煤作用都发育在三级海平面下降至上升的转折时期 ,在层序地层格架中处于高位体系域的顶部。薄煤层的形成与四级海平面变化旋回相对应 ,发育于准层序的顶部。聚煤作用的发育受到海平面变化的控制 ,海平面变化提供了有机质堆积的潜在容纳空间 ,海平面升降周期的长短决定了聚煤作用持续发育的时间 ,周期性的海平面变化控制了聚煤作用的时空演化。
According to results of sequence stratigraphic research,the Carboniferous Permian depositional formation in North China formed in the second order sea level change cycle,which includes 4 cycles in the third order and 26 cycles in the fourth cycle.Several large scale coal accumulations took place in the turning period from fall to up of the third order sea level,locating in the top of highstand system tracts.The formaion of thin coal seams correlated to the fourth order sea level change cycle and occurred in the top of parasequences.The development of coal accumulation is controlled by sea level change cycle.The sea level change supplied potential accommodate space.The development range of coal accumulation is controlled by the period range of sea level change,which control the evolution of coal accumulation in time and space.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2000年第5期8-11,共4页
Coal Geology & Exploration
关键词
海平面
层序地层
聚煤作用
二叠纪
华北
石炭纪
sea level
sequence stratigraphy
coal accumulation process
Carboniferous Permian
North China
