Abstract:

The paper made a descriptive record on the drill core ZK1 located at Jijiazhuang and the drill core ZK2 located at Zhaojiatun in the Hengshui suburbs by lithologic descriptions, lithofacies, age of stratigraphy, analysis of sporopollen and stratigraphic correlation. Combined with previous research results in the area, we drew conclusions that the two drilling cores revealed the Holocene with the thickness of 8-9 m in the study area, the Upper Pleistocene with the thickness of 31-36 m and the Middle Pleistocene with the thickness of 72-75 m. According to elevation of the wellheads and the bottom of the same petrofabric, the study area was speculated to locate on the ancient slope towards east direction. Mainly based on lithostratigraphy and chronostratigraphy, combined with sporopollen and the combination of main macro-characteristics and micro-markers, the drilling cores revealed the petrofabric of the equivalent thickness during the same stage in the study area; meanwhile, there was no significant differential uplifting-subsidence movement, and it was in a relatively stable sedimentation environment overall since the Middle Pleistocene.

Key words: core, sporopollen, stratigraphic correlation, bottom of petrofabric, differential uplifting-subsidence movement, Hengshui area, Hebei Province