火星表面沙丘中冲沟的成因及对撞击坑壁冲沟成因的启发  

Potential Origination of Gullies Developed on Sand Dunes and Its Implications to Gullies on Crater Rims

作　　者：岳宗玉[1] 谢红接 刘建忠[3] 欧阳自远[3] 

机构地区：[1]中国科学院遥感应用研究所,北京100101 [2]Department of Geological Sciences,University of Texas at San Antonio,Texas 782,19,USA [3]中国科学院国家天文台,北京100012

出　　处：《地球科学（中国地质大学学报）》2010年第2期291-301,共11页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金项目(Nos.40573047,40871202);国家高技术研究发展计划专项(Nos.2008AA12A213,2009AA12Z310)

摘　　要：借助于15幅高分辨率的HiRISE影像与107幅MOC影像,对火星表面撞击坑壁与沙丘中出现的非常年轻冲沟形态特征进行了详细研究,并据此检验冲沟成因假说.影像特征分析结果首先支持沙丘中冲沟是由液态水携带泥沙冲刷而成的理论,而撞击坑壁出现的多边形土证实火星表面下冰的存在,且在适当的条件下可转变为液态水形成冲沟.Mars gullies,the very young features exposed on crater rims and sand dunes,are studied in detail using 15 HiRISE images and 107 MOC images in this research,and the hypotheses of gully origination are examined.The results support the hypothesis that the gullies were formed by the erosion of liquid water that carried sand particles.And the existence of polygonal shape on crater walls suggests that water ice maybe located on Mars subsurface,which can melt to liquid water and produce gullies.

关 键 词：火星 冲沟 沙丘 遥感地质 摄影测量 

分 类 号：P185.3[天文地球—天文学] P627