Initial mapping of Mercury's crustal magnetic field: Relationship to the Caloris impact basin

摘要: Seventy-eight low-altitude passes of MErcury Surface, Space ENvironment, GEochemistry, and Ranging magnetometer data from August to September 2014 have been applied produce an approximate map the crustal magnetic field at a constant altitude 80 km covering latitudes 50°–80°N longitudes 160°–330°E. The strongest anomalies are located in westernmost part mapped region just north northeast Caloris impact basin. single anomaly group lies over smooth plains unit that extends northward Caloris. A second on Odin Formation, interpreted as primary ejecta. third broad also unit, Suisei Planitia. Although many Mercury may volcanic origin, subset these is concentrated around could dominantly origin. It therefore proposed Mercurian sources consist basin ejecta materials.