新疆早-中侏罗世聚煤期同沉积构造及其控煤效应

新疆早-中侏罗世同沉积（期）构造活动自始至终与聚煤作用相伴，并直接影响含煤地层发育程度和煤层的原生厚度及结构。该期同沉积构造活动受特提斯-喜马拉雅地球动力学体系控制，其主要活动方式表现为同沉积逆冲断层和同沉积正断层，从而造成聚煤盆地基底沉降速度与幅度的明显差异。在其控制下，聚煤盆地的沉积中心和赋煤中心有自西向东、由南向北迁移的趋势；从含煤区尺度进行比较，聚煤强度与盆地基底总体沉降幅度呈负相关关系；从含煤盆地或煤田尺度进行比较，聚煤强度与盆地基底沉降速度之间的关系分别表现为正相关型、抛物线型及负相关型。 

Synsedimentary structures of Early-Middle Jurassic coal-accumulating period and their control on coal in Xinjiang

The contemporaneous tectonic activity accompanying the coal accumulation from the beginning to the end has direct effect on the development degree of coal-bearing strata, and the original thickness and structure of coal seams in the Early-Middle Jurassic in Xinjiang. The synsedimentary tectonic activity, controlled by the Tethys-Himalayan geodynamic system, mainly shows synsedimentary reverse thrust and normal faults in the period. As a result, the subsidence velocity and range of the basement of coal-accumulating basins differ obviously in the Early-Middle Jurassic period in Xinjiang. Under the control of the Tethys-Himalayan geodynamic system, the depocenter and coal-bearing center of the coal-accumulating basin in the Early-Middle Jurassic period in Xinjiang show a tendency of migration from the west to the east and from the south to the north. Comparing coal-bearing region scale, the coal-accumulating strength and the overall subsidence range of the basement of basin present a negative correlation; Comparing coal basin or coal field scale, the relationship between the coal-accumulating strength and the subsidence velocity of the basin basement present positive correlation, parabola and negative correlation respectively.