火星大沙波纹特征及其形成机制

董治宝, 吕萍, 李超, 胡光印

Characteristics and Formation Mechanism of Large Ripples on Mars

Zhibao Dong, Lü Ping, Chao Li, Guangyin Hu

图9 火星维多利亚陨击坑开铺圣玛丽露头显示的埋藏大沙波纹（据参考文献［3］修改） (a)火星探测漫游者全景相机在维多利亚陨击坑开铺圣玛丽露头拍摄的照片；(b)图（a）中白色方框区域的分米级交错层理；（c）对图（b）交错层理的深入解析；（d）通过复合床面动力学模型模拟的不能被解释（上）和能被解释（下）的层理结构；黄色和红色线条分别代表沙丘和大沙波纹移动产生的侵蚀面;蓝色线条代表大沙波纹的交错层理;黑色表示不能被解释的层理

Fig.9 Candidate wind-drag ripple stratification on Mars: Mars Exploration Rover Panoramic Camera image (P2441, sol 1212) of Cape St. Mary outcrop, Victoria crater, Mars (modified after reference [3]) (a) Mars Exploration Rover Panoramic Camera image of Cape St. Mary outcrop, Victoria crater, Mars; (b) Decimeter-scale cross-strata of the white box shows the location of (a); (c) An interpretation of stratal features from (b)；(d) Uninterpreted (top) and interpreted (bottom) stratification produced by kinematic modeling of compound bedforms. Yellow and red lines represent erosional surfaces produced by migration of dunes and wind-drag ripples separately; Blue lines indicate wind-drag ripple cross-stratification; Black lines represent uninterpreted stratification