3D Gravity and Magnetic Forward and Inversion

Horin Gravity and Magnetic 3D Forward and Inversion allows for the single or joint 3D forward and inversion of gravity and magnetic data based on an initial geological model, such as an implicit 3D geological model. The 3D inversion modeling of gravity and magnetic data, under the constraint of initial information, can utilize know prior information or inversion constraint boundaries to infer unknown area(where exploration data is unavailable) from known areas(where exploration data is available). This approach helps reduce the ambiguity in gravity and magnetic inversion and yields more reliable inversion results.

Method 1 for Creating the Initial Constraint Model: 3D Mesh Automatic Partitioning + Human-Computer Interactive Polygon Interpolation for 3D Model Generation Across Multiple Cross-Sections + 3D Regular Model

Interface of 3D Meshing

Interactive  Property Model Creation

Horin Software gravity and magnetic 3D inversion module enables interactive creation of initial inversion  models, including theoretical models such as spheres, ellipsoids, plates and cylinders. It also supports manual use of polygon tools to outline model boundaries based on prior information, and implements 3D interpolation to generate 3D models. Each model can have its average physical properties and distribution ranges set individually, resulting in more accurate inversion results.

Set Physical Property Distribution Range

Method 2 for Creating the Initial Constraint Model: Converting Complex Implicit 3D Geological Models to Initial Models

Horin Software allows the complex implicit 3D geological models created within the software to be assigned different initial values, minimum values, and maximum values for density and magnetic susceptibility based on different geological units. This serves as the initial model for the 3D forward and inversion of gravity and magnetic data. This initial model incorporates prior geological information, resulting in higher reliability for the gravity and magnetic 3D inversion conducted using this initial constraint model. (For modeling methods, please refer to the relevant content on implicit 3D geological modeling.)

                                                 Implicit geological model                                     Subdivision and property settings of implicit geological models

3D Gravity and Magnetic Forward and Inversion

Gravity and Magnetic 3D Forward and Inversion Calculation

The full 3D voxel gravity and magnetic forward and inversion has inherent advantages over 2D gravity and magnetic forward and inversion: there is a significant disparity between the 2D constraints of the inversion  and the 3D constraints of the  data. This intrinsic multidimensional constraint significantly reduces the ambiguity in gravity and magnetic inversion and greatly enhances the reliability of the inversion results.

3D susceptibility models  under geological constraints                                    3D susceptibility models  under geological constraints- thick slice

Interpretation of 3D inversion magnetic susceptibility models under geological constraints: 3D isosurface + slice model

Interpretation of 3D inversion density models under geological constraints: 3D threshold + chair-clipping model