陕西陈仓九龙山地质公园丹霞地貌类型及形成机制研究

On Danxia Landform Type and Formation Mechanism of Jiulong Mountain Geopark in Shanxi

陕西陈仓九龙山地区是鄂尔多斯盆地西南缘丹霞地貌分界的关键地带,系统完整地保留了丹霞地貌形成演化过程.通过对地质公园丹霞地貌野外调查和系统研究,发现该地区丹霞地貌类型多样齐全,发育序列完整,各期丹霞地貌景观均有发育,以壮年期丹霞地貌为主体.本文采用定性与定量相结合,依据丹霞地貌景观的评定体系和评定方法,对地质公园的丹霞地貌类型进行划分与评价.结果表明:地质公园丹霞地貌类型、规模在全国具有典型意义.同时以现代地貌学发展的最新理论为指导,对九龙山丹霞地貌形成机制进行系统研究,为探讨鄂尔多斯盆地西南缘构造沉积特征,鄂尔多斯盆地与秦岭造山带的盆山关系提供依据.

The area of the Jiulong Mountain is the key area of the Danxia Landform demarcation in the southwest margin of the Ordos Basin,where the formation and evolution of Danxia Landform are preserved completely.Through the field investigation and systematic study of Danxia Landform in the park,it is found that the Danxia Landform types in this area are diverse and complete,the development sequence is intact,the Danxia Landform landscape in each period is developed,and the main body of Danxia landform is in the prime period.According to the evaluation system and evaluation method of Danxia Landform landscape.In this paper,the Danxia Landform types of the park have been divided and evaluated in the combining qualitative and quantitative methods.The results show that the type and scale of Danxia Landform in the park is of typical significance in China.At the same time,based on the latest theory of modern geomorphology development,this paper makes a systematic study on the formation mechanism of the Danxia Landform in Jiulong Mountain which is of great scientific value for the analysis of the tectonic sedimentary features of the southwest margin of the Ordos Basin and the basin and mountain relationship of the Basin and Qinling Orogenic Belt.