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Aiming at the low vertical resolution of correlation imaging inversion in the mineral exploration， a correlation imaging inversion based on depth weighting with gravity gradiometry data is proposed. The vertical space resolution of the inversion would be improved by the means of combining multiple gravity gradiometry tensors， introducing the depth weighting function based on the prior information and the underground zonal weighting method. In the data test，it is demonstrated by the cube-combination model that the proposed method could inverse the objective location accurately， the numerical range of computed density is consistent with the theoretical model， and the method has the anti-noise ability. The inversion is then applied to the real gravity gradiometry data from Vinton Dome， U. S.， the location of the cap rock displayed in the results conforms to the known geological information. It is proved that the method is effective and practical. [ABSTRACT FROM AUTHOR]

In order to improve the data tomography efficiency in the gravity exploration，gravity anomaly data from the geophysical exploration were processed by fast three-dimensional tomography. The algorithm of Taylor series was used for the prism unit based on the related probability tomography theory， in which the calculation model of anomaly data were redefined to obtain new geometric functions. The tomography method reduces the calculation amount and the number of iterations by series expansion and integral. In the theoretical model test， it is proved that the proposed method has good tomography ability and anti-noise characteristic. The efficiency analysis shows that the algorithm can greatly shorten the calculation time of the geometric function matrix and improve the imaging efficiency. Fast tomography was applied for the real gravity anomaly data of Vinton Dome， the location of geological body could be shown well， which verifies the algorithm feasible. [ABSTRACT FROM AUTHOR]

：An improvement was made on the basis of directional total horizontal derivative to increase the edge detection resolution in the gravity exploration and enhance the ability of dividing and detecting geological body boundary. Six newkinds of edge detectors were presented， including the vertical derivative of directional total horizontal derivative and enhanced directional total horizontal derivative， directional total horizontal derivative and its vertical derivative integrated in x， y and z direction， which are based on gravity gradiometry data. Through the theoretical model and noise test， it is proved that the improved methods have the good ability for boundary division. Compared with the ordinary ones， the detected edges agree well with that from the model. The real data from Vinton Dome are introduced into the proposed methods and the edges of underground cap rock are recognized more clearly， and the feasibility of the proposed methods is verified. [ABSTRACT FROM AUTHOR]