Shallow Magmatic Intrusions in the Lunar Nearside Highlands?

2755. [19] Wieczorek, M. A. et al. (2013) Science 339, 671-675. Figure 1: Locations of floor-fractured craters [2] plotted on a basemap of crustal thickness [19]. Floor-fractured craters are preferentially located in regions of intermediate (20-30 km) crustal thickness. Mare deposits are located primarily on the lunar nearside and in regions of thinner crust. Figure 2: Crater Buch B (17.0°E, 39.9°S) A) Band-filtered Bouguer gravity anomaly data showing a high-density anomaly beneath the crater Buch B. B) Clementine RGB composite color ratio image of Buch B showing the dark halo and rays surrounding the impact crater Buch B, the halo and rays having characteristics corresponding to a mafic mineralogy. Figure 3: Crater Janssen (41.5°E, 44.9°S), crater rim marked by dashed line. A) Band-filtered Bouguer gravity anomaly data showing a broad positive anomaly beneath the center of the floor-fractured crater Janssen, and also beneath the superposed floor-fractured crater Fabricius. B) Clementine RGB composite color ratio image showing mafic signatures within a superposed crater on the floor of Janssen, possibly excavating mafic material from the postulated subcrater intrusion. 1583.pdf 46th Lunar and Planetary Science Conference (2015)