Whether the gravitational anomalies of the lunar farside can be traces of ancient mantle plumes?

Global topographic and gravitational field models derived from data collected by the Clementine spacecraft reveal a new picture of the shape and internal structure of the Moon. The discovery of gravitational signatures ("mascons") at continental part of Lunar far side (and not only at mare basins) raises the question about its origin. It is interesting to verify a hypothesis of an origin of these anomalies connected with a motion of convection plumes, which took place in an early stage of evolution of the Moon. In this case the convection plumes could be preserved in the top crust of the Moon as positive gravitational anomalies. The behavior of a lunar surface in a vicinity of such anomalies will have the certain characteristics: increasing of a thermal flow in region of the plume; in a tectonosphere of continental crust the plume produces positive gravitational anomalies; topographic features in the form of arched lineament; the pluton-like intrusions (''mascons''); the crust becomes more thin due to Moho boundary uplifts. We have carried out a visual analysis of topographical and gravitational maps, which were obtained by Clementine, in zones of gravitational anomalies of a different origin. The analysis was directed on search for topographical features describing plume manifestation and for correlation of gravitational anomalies with a topographic relief.