10.1029-2018JE005826Figure211460005.pptx

The basin-forming process for an impactor 780 km in diameter (200-km diameter of iron core) with an impact velocity of 6.4 km/s using the warmer profile Thermal profile 2 (TP2). The Moon was assumed to be a 3,500-km-diameter sphere with 700-km-diameter of iron core. The crustal thickness is assumed to be 40 km. In each panel, the left halves represent the materials used in the model: the gabbroic anorthosite (pale green), dunite (blue), and iron (orange) represent the lunar crust, mantle, and core, respectively. The gabbroic anorthosite (pale yellow) also represents the impactor material. The right halves represent the temperature variation during the impact process. The arrows in (c) and (d) represent the local crustal materials that were displaced and form the new crust together with deposited ejecta.

采用较温暖的热剖面2（Thermal Profile 2，TP2）模拟直径780 km（铁芯直径200 km）、撞击速度6.4 km/s的撞击体形成盆地的过程。月球被假设为直径3500 km的球体，其铁芯直径为700 km。地壳厚度假设为40 km。在每个面板中，左半部分展示模型所用材料：辉长斜长岩（淡绿色）、纯橄榄岩（蓝色）和铁（橙色）分别代表月球地壳、地幔和地核。辉长斜长岩（淡黄色）还代表撞击体物质。右半部分展示撞击过程中的温度变化。面板（c）和（d）中的箭头代表发生位移的局部地壳物质，这些物质与沉积的喷出物共同形成新地壳。