| 月表地貌起伏形态分异特征及分级标准研究 |
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| 引用本文： | 邓佳音,程维明,刘樯漪,焦毅蒙,刘建忠.月表地貌起伏形态分异特征及分级标准研究[J].地理学报,2022,77(7):1794-1807. |
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| 作者姓名： | 邓佳音 程维明 刘樯漪 焦毅蒙 刘建忠 |
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| 作者单位： | 1.中国科学院地理科学与资源研究所 资源与环境信息系统国家重点实验室,北京 1001012.中国科学院大学,北京 1000493.中国科学院比较行星学卓越创新中心,合肥 2300524.中国科学院地球化学研究所月球与行星科学研究中心,贵阳 550002 |
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| 基金项目： | 中国科学院先导科技专项(XDB41000000);国家自然科学基金项目(42130110);国家自然科学基金项目(41571388);国家科技基础性工作专项(2015FY210500) |
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| 摘 要： | 月球地貌是月球表面发生的地质和地貌过程的结果,月球地貌单元的划分和等级分类体系的构建是月球地貌学研究的基础,也是月球地貌图制图的基础和关键科学问题。地貌学是研究形态和成因的科学,高程和起伏度是最基本的地貌指标。本文基于LOLA（Lunar Orbiter Laser Altimeter） DEM数据以及LOLA和SELENE TC（Terrain Camera）融合的DEM数据（SLDEM2015,文中简称SLDEM）,利用均值变点法确定月表起伏度计算的最佳窗口,并以起伏度100 m、200 m、300 m、700 m、1500 m及2500 m为阈值将月球表面分为微起伏平原（< 100 m）、微起伏台地100 m, 200 m）、微小起伏丘陵200 m, 300 m）、小起伏山地300 m, 700 m）、中起伏山地700 m, 1500 m）、大起伏山地1500 m, 2500 m）及极大起伏山地（≥ 2500 m）地貌7个类型。划分结果显示：微起伏平原主要分布在月海平原区域、部分有玄武岩充填的撞击盆地的盆底区域以及撞击坑坑底区域;微起伏台地主要分布在月海和月陆区域的交界区域;微小起伏丘陵主要分布在月溪和皱脊等构造单元区域;小起伏山地主要分布在撞击坑中央峰及坑底断裂区域;中起伏山地主要分布在撞击坑坑底和坑壁过渡区域、撞击坑坑壁和坑缘过渡区域、撞击盆地盆底与盆壁过渡区域以及盆壁与盆缘过渡区域;大起伏和极大起伏山地主要分布在撞击坑坑壁区域及撞击盆地盆壁区域。本文确定的月表起伏度分级标准可以对月表数字地貌分类体系的构建和月球地貌图集的编研提供定量标准和重要参考。
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| 关 键 词： | 月球地貌分类 形态特征 起伏度 分布特征 分级标准 |
| 收稿时间： | 2021-12-09 |
| 修稿时间： | 2022-04-07 |
Morphological differentiation characteristics and classification criteria of lunar surface relief amplitude |
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| DENG Jiayin,CHENG Weiming,LIU Qiangyi,JIAO Yimeng,LIU Jianzhong.Morphological differentiation characteristics and classification criteria of lunar surface relief amplitude[J].Acta Geographica Sinica,2022,77(7):1794-1807. |
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| Authors: | DENG Jiayin CHENG Weiming LIU Qiangyi JIAO Yimeng LIU Jianzhong |
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| Institution: | 1. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic and Natural Resources Research, CAS, Beijing 100101, China2. University of Chinese Academy of Sciences, Beijing 100049, China3. CAS Center for Excellence in Comparative Planetology, Hefei 230052, China4. Lunar and Planetary Science Research Center, Institute of Geochemistry, CAS, Guiyang 550002, China |
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| Abstract: | The lunar landform is the result of the geological and geomorphic processes on the lunar surface. It is very important to identify the type of the lunar landforms. Geomorphology is the scientific study of the origin and evolution of topographic landforms on the planetary surface. Elevation and relief amplitude are the most commonly used geomorphic indexes in the study of geomorphological classification. Previous studies have determined the elevation classification criterion of lunar surface. In this paper, we focus on the classification criterion of the topographic relief amplitude of the lunar surface. As for the estimation of the best window to calculate the relief amplitude of the lunar surface, we used the method of change-point in the mean based on LOLA (Lunar Orbiter Laser Altimeter) DEM data and DEM that combines the LOLA and SELENE TC (Terrain Camera) merged Digital Elevation Model (SLDEM2015). According to the statistical analysis of the basic lunar landforms, the classification criterion of lunar surface relief amplitude is determined. Taking the topographic relief amplitudes of 100 m, 200 m, 300 m, 700 m, 1500 m and 2500 m as the thresholds, the lunar surface is divided into seven geomorphic types, including slightly micro-relief plains (< 100 m), slightly micro-relief platforms 100 m, 200 m), micro-relief landforms 200 m, 300 m), small relief landforms 300 m, 700 m), medium relief landforms 700 m, 1500 m), large relief landforms 1500 m, 2500 m) and extremely large relief landforms (≥ 2500 m). The slightly micro-relief plains are mainly distributed in the maria, and the floor of craters and basins that are filled with basalts, while the slightly micro-relief platforms are mainly distributed in the transition regions between the maria and highlands. The micro-relief landforms are mainly located in the regions with higher topography than the mare, such as wrinkle ridges and sinuous rilles in the mare. The small relief landforms are mainly scattered in the central peak and floor-fractured of craters. The medium relief landforms are mainly distributed in the transition regions between the rater floor and carter wall, between the crater wall and crater rim, between the basin floor and basin wall, and between the basin wall and basin rim. Large and extremely larger relief landforms are mainly scattered in the crater wall and basin wall. The determination of classification criteria of lunar surface relief amplitude in this paper can provide important references for the construction of digital geomorphology classification schemes of the lunar surface. |
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| Keywords: | lunar geomorphological classification schemes morphometric features lunar relief amplitude characteristics analysis classification criteria |
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