文章摘要
吴昊,彭小华,祝捷,党晨,王卓胜,姚珊,陈艳.陕西靖边龙洲波浪式丹霞地貌景观特征及其成景环境分析[J].矿产勘查,2021,12(2):497-502
陕西靖边龙洲波浪式丹霞地貌景观特征及其成景环境分析
Characteristics and forming environment of wave-type Danxia landform landscape in Longzhou,Jingbian County, Shaanxi Province
投稿时间:2020-08-05  
DOI:
中文关键词: 洛河组  丹霞地貌  波浪式  景观特征  成景环境  陕西
英文关键词: Luohe Formation, Danxia landform, wave-type, landscape features,environment,Shannxi Province
基金项目:陕北丹霞地貌地质遗迹详细调查(编号:20180201)和延安丹霞地貌资源评价研究及保护利用(编号:20190201)联合资助。
作者单位
吴昊 陕西省矿产地质调查中心,陕西 西安 710068, 
彭小华 陕西省矿产地质调查中心,陕西 西安 710068, 
祝捷 陕西省矿产地质调查中心,陕西 西安 710068, 
党晨 陕西省矿产地质调查中心,陕西 西安 710068, 
王卓胜 陕西省矿产地质调查中心,陕西 西安 710068, 
姚珊 陕西省矿产地质调查中心,陕西 西安 710068, 
陈艳 陕西省地质调查规划研究中心,陕西 西安 710068 
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中文摘要:
      陕北靖边龙洲波浪式丹霞地貌发育在陕北黄土高原向沙漠高原的过渡地带,成景地层为白垩系洛河组,发育大型斜层理、交错层理的巨厚层-块状风成砂岩,主要受流水侵蚀和风力侵蚀改造作用形成,多沿正-负地貌过渡地段,如谷顶发育,呈带状分布,形态具有圆滑、流畅,犹如波浪的特征,其微观或单体形态还有“陀螺状”“油塔状”“丝带状”“金钱状”等,其不同于中国南方丹霞地貌,国内罕见;在世界范围内,与美国亚利桑那州波浪谷在成景地层、时代尤其是景观发育部位、组合和特征方面存在明显差异,其对比研究价值巨大。龙洲丹霞地貌的成景环境受构造隆升、节理、裂隙、水流侵蚀、风力侵蚀改造、重力崩塌、冻融作用等多个内外因素耦合控制。
英文摘要:
      The wave-type Danxia Landform in Longzhou of Jingbian County of northern Shaanxi Province is developed in the transitional zone between Loess Plateau and Mu Us Desert. The stratigraphic sequence which forms Danxia Landform belongs to Luohe Formation of Early Cretaceous, and its lithology is thick, massive eolian sandstone with large-scale oblique and cross beddings developed.The wave-like Danxia Landform is formed by the combination of water and wind erosions, and usually develops on the positive landforms such as the top of a valley with ribbon-like extension, and is characterized with smooth and fluent shape, just like the waves. Moreover, the miniature landform can be further classified into top-like, egg tart-like, ribbon-like, coin-like shapes, etc. It is different from the danxia landform in south China, and it is unique in China.In the world, there are obvious differences between wave Valley and Arizona in terms of landscape formation, age, especially landscape development location, combination and characteristics, and its comparative study is of great value.The landscape-forming environment of Danxia landform in Longzhou is controlled by the coupling of several internal and external factors such as tectonic uplift, joints, fractures, water flow erosion, wind erosion reconstruction, gravity collapse, freeze-thaw action and so on.
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