郑州黄河国家地质公园五龙峰黄土剖面沉积环境研究

Depositional Environment of Wulongfeng Loess Section in Zhengzhou Yellow River National Geological Park

郑州黄河国家地质公园五龙峰黄土剖面,在短短12万年内沉积了66 m厚的黄土,大大超过了黄土高原地区,这是本区地层沉积的一大特点.采用野外调查与室内测试分析相结合的方法,通过地层古生物化石、粒度、磁化率等测试手段,综合分析了五龙峰黄土剖面的沉积环境.结果表明,自中更新世晚期至晚更新世中期该区经历了3次较大规模的古气候冷暖旋回.该研究成果为当地古气候、古环境的变化、地质考察提供了科学的指导,也为该地质公园的地质科普提供了理论支撑.

In Wulongfeng loess section of Yellow River National Geological Park of Zhengzhou, 66 m thick loess were deposited in a short span of 120 000 years, which is much faster than other loess plateau regions. This is the characteristics of stratigraphy sedimentation in the area. With the combination method of field survey and indoor test analysis, by testing stratigraphic fossils, particle size and magnetic susceptibility, we comprehensively analyzed the sedimentary environment of Wulongfeng loess section. The result shows that since the late period of Middle Pleistocene to the middle period of Late Pleistocene, this area undergone three large-scale paleoclimate cycles. The study provides scientific guidance for the changes of local paleoclimate and paleoenvironment, and the geological investigation, and provides theoretical support for the popularization of science of geological park.