Renjiazhuang Mining District, Yongning Co., Yinchuan, Ningxia, Chinai

Regional Level Types
Renjiazhuang Mining District	Mining District
Yongning Co.	County
Yinchuan	Prefecture
Ningxia	Autonomous Region
China	Country

The coal-bearing formations of Renjiazhuang Mining District are mainly the Taiyuan Formation of the Pennsylvanian and the Shanxi Formation of the Early Permian, with 24 coal layers (Figure 2) [13]. The lithology of the Shanxi Formation includes grayish-white fine sandstone, mudstone, dark-gray medium-coarse sandstone, grayish-black siltstone, coal seam as well as a small amount of clay rock and asphaltene mudstone. The Shanxi Formation contains 13 coal layers in total, with minable coal seams of M1, M3, M4, M5, and M6. The total thickness is 3.98–24.69 m and the average coal thickness is 15.30 m. Moreover, the Shanxi Formation is deposited in a typical delta environment.
The lithology of the Taiyuan Formation includes fine sandstone, grayish-black mudstone, siltstone, limestone, coal seam, grayish-white medium-coarse sandstone, clay rock, and asphaltene mudstone. The Taiyuan Formation contains 11 coal seams in total, with minable coal seams of M8, M9, and M10. The thickness of the minable coal seams is 3.25–13.55 m (8.21 m on average). It is formed in sedimentary environments of tidal deltas, barrier sands, and lagoons.

Other Regions, Features and Areas containing this locality

References