景泰盆地层序地层及沉积体系分析

以景泰中生代含煤盆地(陆相聚煤盆地)为研究对象,运用层序地层学理论,依据地质露头资料,探索了富煤单元的预测方法。通过研究,划分出本区各级层序地层单元,确定了富煤单元的形成条件和富煤带的分布部位:景泰盆地含煤段(J1、J21)可识别出4个成因地层单元;J1的煤1、煤2组富煤带分布于泥炭供给充足,且盆地沉降速度与泥炭堆积速度均衡的部位;J21的煤3、煤4组富煤带分布于盆缘与沉降中心之间,并靠近沉降中心的一侧。

Analysis of sequence stratigraphy and sedimentary system in Jingtai basin

Taking Jingtai Mesozoic coal-bearing basin as an example the prediction method for exploring Mesozoic coal enrichment unit is researched with the theory of sequence stratigraphy under the condition of terrestrial coal ac-cumulating basin,and based on the portrait materials of outcrop.The study identified each sequence stratum unit and determined the forming condition and distribution of coal enrichment unit.The study results show that the coal-bearing interval(J1,J21) in Jingtai basin contains four genetic stratigraphic units;The Coal 2 and Coal 1 of J1 dis-tributed in the area with abundant peat and where the speed of the basin settlement and the peat accumulation are balanced.The rich set of the Coal 3 and Coal 4 of J21 distributed between the edge of the basin and the centers of set-tlement.