The morphology of Mercury's Caloris basin as seen in MESSENGER stereo topographic models
The morphology of Mercury's Caloris basin as seen in MESSENGER stereo topographic models
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DOI：
10.1016/j.icarus.2010.03.009
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发表时间：
2010-09-01
期刊：
影响因子：
3.2
通讯作者：
Solomon, Sean C.
中科院分区：
文献类型：
--
作者：
Oberst, Juergen;Preusker, Frank;Solomon, Sean C.
的数字地形模型Caloris盆地是水星上最大的特征明确的撞击盆地，其有效空间分辨率为1000米，是根据信使号窄角照相机获得的208幅立体图像制作的。盆地边缘远非均匀，其特征是地形崎岖或多节平原，经常被陨石坑和放射状槽破坏。边缘由单个标记的海拔台阶表示，其中高度水平从周围向盆地内部下降约2 km。两个同心环，半径为690 km和850 km，可以从地形模型中识别出几个前卡路里盆地和陨石坑，这表明撞击前崎岖的地形可能导致了卡劳里斯边缘的不同特征。盆地内部相对光滑和浅，与典型的月球mascon mare盆地相当，支持Caloris在形成后部分被熔岩填充的观点。模型显示了盆地内部地形的长波长波动，但这些波动不能轻易与撞击前的地形，火山建设，由于无法排除模型长波地形的误差，因此必须等待信使号轨道使命阶段的数据来确认这些起伏。（C）2010 Elsevier Inc.
A digital terrain model (1000-m effective spatial resolution) of the Caloris basin, the largest well-characterized impact basin on Mercury, was produced from 208 stereo images obtained by the MESSENGER narrow-angle camera The basin rim is far from uniform and is characterized by rugged terrain or knobby plains, often disrupted by craters and radial troughs In some sectors, the rim is represented by a single marked elevation step, where height levels drop from the surroundings toward the basin interior by approximately 2 km Two concentric rings, with radii of 690 km and 850 kin, can be discerned in the topography Several pre-Caloris basins and craters can be identified from the terrain model, suggesting that rugged pre-impact topography may have contributed to the varying characteristics of the Caloris rim The basin interior is relatively smooth and shallow, comparable to typical lunar mascon mare basins, supporting the idea that Caloris was partially filled with lava after formation The model displays long-wavelength undulations in topography across the basin interior, but these undulations cannot readily be related to pre-impact topography, volcanic construction, or post-volcanic uplift Because errors in the long-wavelength topography of the model cannot be excluded, confirmation of these undulations must await data from MESSENGER's orbital mission phase (C) 2010 Elsevier Inc All rights reserved