We suggest a new approach to a quantitative interpretation of gravity anomalies caused by single 3D objects on interval limitation settings of their dimensions, the occurrence depth and the anomalous density. The creation of the localization function, which describes the presence probability of the anomalous object in elementary geological volumes, makes by the synthesis of the set of feasible solutions for a gravity inverse problem. The application of this algorithm in practice permits to increase the probability of the revelation of sought geological objects in stated intervals of depths by prospecting and exploratory boreholes, which recommended on gravity data. Keywords: anomaly, inverse problem, probability, localization, source.