基于粗糙度的月表虹湾地区地形地貌解译  

The Interpretation of the Land Form of Sinus Iridum on the Moon Based on the Roughness

作　　者：奚晓旭[1] 刘少峰[1] 吴志远[1] 韦蔚[1] 焦中虎[1] 李力[1] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083

出　　处：《国土资源遥感》2012年第1期95-99,共5页Remote Sensing for Land & Resources

基　　金：国家863项目重点课题"月球数字地质图编制与月球演化模型综合研究"(编号:2009AA12220101)资助

摘　　要：行星表面粗糙度是表面侵蚀、沉降和隆升等作用在行星表面留下的记录,对其进行的定量分析可以精确地反映其表面地质构造过程。对月球的虹湾地区选取水平方向的12条剖面进行了粗糙度各参数(均方根高程、均方根偏差、均方根坡度、Hurst指数)的计算,结果表明:①在1 km的剖面长度上,虹湾地区均方根高程的平均值在3 m左右;在0.2～3 km研究尺度范围内,虹湾地区的坡度不超过2°,说明该区月表起伏度小;②虹湾地区的Hurst指数集中在0.5～0.78之间,表明月表地形地貌样式单一;③低纬度地区(小于N 44.3°)Hurst指数相对较高(0.6～0.8),高纬度地区(大于N 44.3°)Hurst指数较低(0.5～0.6);④运用粗糙度的概念可作为一种推断相对地质年龄的方法。分析结果与实际相符合,证实了粗糙度的定量分析对行星地貌形态及地质构造过程解译的作用。The planetary surface roughness is the record of erosion,deposition,uplift and other geological processes on the planetary surface,and hence serves as a prediction for the geological age of the planetary surface.In this paper,twelve profiles were selected in the horizontal direction of the Sinus Iridum in the moon,and several parameters of roughness of those profiles were studied.Some results have been obtained： ①The average of RMS height along the profile 1 km in length is about 3m.In addition,within the research scale selected in this paper（0.2~3 km）,the slope of Sinus Iridum area does not exceed 2 °.This means that the surface of Sinus Iridum is relatively smooth.②Hurst exponent of Sinus Iridum is mainly concentrated from 0.5 to 0.78,which means that the surface morphology is rather homogeneous.③Low latitude areas（lower than 44.3°N）have relatively high Hurst exponent（from 0.6 to 0.8）,and high latitude areas（higher than 44.3°N）usually have lower Hurst exponent（from 0.5 to 0.8）.④The roughness may be used as a means to determine the relative geological age.

关 键 词：虹湾 粗糙度 HURST指数 地貌形态 相对地质年龄 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]