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Welcome to Geosoft's Guided Learning Path

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Kickstart your learning with our guided paths that put you in the driver’s seat and help you master key concepts, tools, and effective workflows. Incorporate learning into your daily exploration tasks, proceed at your own pace, and track your progress as you familiarize yourself with the software.

Learning Paths

  • Getting Started

    About VOXI Earth Modelling

    An introduction to VOXI Earth Modelling, containing brief descriptions of the terminology used in the VOXI environment and a video demonstrating the VOXI Viewer.

    Preparing Data for Inversion

    Best practices around the necessary data required for perform your first inversion and a video demonstrating the data preparation steps.

  • Basic Unconstrained Inversions

    Adding Data for an Unconstrained Inversion

    Add the data necessary to perform an unconstrained inversion, including assigning error values, removing the background trend and modifying the mesh parameters.

    Running the Unconstrained Inversion

    Upon adding data to the VOXI session, run the unconstrained inversion.

    Exporting Inversion Parameters

    Export the parameters used in your inversion so you can re-use and modify as needed for later sessions or for reference.

    Exporting and Inspecting Inversion Results

    Export the unconstrained inversion results as a Geosoft Voxel file to share with others or to integrate with other data in the 3D Viewer, or alternatively, display the results in a 3D map.

    Comparing Inversion Results to Data

    Compare the predicted data from the inversion results to the observed data in Oasis montaj in order to assess the quality of the result.

  • Advanced Forward Modelling

    Building Geologic Models using NODDY

    Model more realistic geological scenarios using NODDY - a geological model building tool - for use in VOXI Forward Modelling.

    Extending a Model - Adding and Adjusting Data

    Add and adjust the data to run a forward model by introducing padding to compensate for the regional effect that contributes to the potential field response.

    Extending and Running the Forward Model

    Upon adding and adjusting the data, run the forward model, continue to pad the active volume and re-run the forward model.

    Extending a Model - Exporting and Viewing Results

    Export and view the predicted response database, and compare the results from the forward model calculations in the 3D Viewer.

  • Basic Forward Modelling

    Adding Data

    Define the input files needed to create a new VOXI session from a Voxel and add data to the session before forward modelling.

    Building a Model

    Build a simple "Half Graben" model based on a normal fault.

    Modifying the DEM and Padding the Active Volume

    Modify the DEM as needed and pad the active volume to minimize edge effects during modelling.

    Running the Forward Model

    Having supplied the voxel model defining the area of interest, added the database containing the data channel to be populated, selected a DEM and modified the model mesh, run the forward model.

    Exporting and Viewing Modelling Results

    Export the predicted response database and as well, grid and view the forward calculated data.

  • Applying Constraints

    Creating Constraint Voxels

    Use voxel math and create an upper bound voxel model for the Upper Bound Constraint Inversion and as well, generate the gradient weighting constraint voxel models.

    Iterative Reweighting Inversion

    Define a reweighting (IRIF) model constraint in VOXI and learn best practices around Iterative reweighting inversion (IRI), including sharpening.

    Applying Drillhole Constraints

    Use the drillhole weight model building tool to easily integrate drillhole data into an VOXI inversion and create constraints.

    Adding Data - Upper Bound Constrained Inversion

    Add the data necessary to perform an upper bound constrained inversion, including assigning error values, removing the background trend and modifying the mesh parameters.

    Adding Data - Gradient Weighting Constrained Inversion

    Add the data necessary to perform an gradient weighting constrained inversion, including assigning error values, removing the background trend and modifying the mesh parameters.

    Applying Constraints - Upper Bound Constrained Inversion

    Apply the Upper Bound constraint to the VOXI session prior to running the inversion.

    Applying Constraints - Gradient Weighting Constrained Inversion

    Apply the upper bound and gradient weighting constraints to the VOXI session prior to running the inversion.

    Running the Upper Bound Constrained Inversion

    Upon adding data to the VOXI session and applying the constraint, run the upper bound constrained inversion.

    Running the Gradient Weighting Constrained Inversion

    Upon adding data to the VOXI session and applying the constraint, run the gradient weighting constrained inversion.

    Exporting Results - Upper Bound Constrained Inversion

    Export the upper bound constrained inversion results as a Geosoft Voxel file to share with others or to integrate with other data in the 3D Viewer, or alternatively, display the results in a 3D map.

    Exporting Results - Gradient Weighting Constrained Inversion

    Export the gradient weighting constrained inversion results as a Geosoft Voxel file to share with others or to integrate with other data in the 3D Viewer, or alternatively, display the results in a 3D map.

    Comparing Constrained Inversion Results

    Compare inversion results - upper bound constrained with unconstrained and upper bound constrained with gradient weighting constrained.

  • Advanced Inversions

    Running a Magnetization Vector Inversion

    Set up and run a Magnetization Vector Inversion (MVI), which incorporates both remanent and induced magnetization without any prior knowledge of the direction or strength of remanent magnetization.

    Introduction to Advanced Inversions

    Best practices around inversion, including understanding the inversion solution space better and the rules of thumb for voxel element sizes, to perform more advanced inversions.

    Running an Airborne Gravity Gradient (AGG) Unconstrained Inversion

    Run an unconstrained gravity inversion using measured Airborne Gravity Gradient (AGG) data.

    Running a Frequency Domain EM Inversion

    Set up and run a Frequency Domain EM Inversion.

    Best Practices for Frequency Domain EM Inversion

    Outlines the principles and operation of VOXI for EM data.

  • Inversion Best Practices

    Introduction

    In this introduction, we cover some of the key concepts and equations requisite to any discussion of inversion best practices.

    Auxiliary Information in Inversion

    This episode is 1 of a 5 part series on inversion best practices. In this video, you'll learn about the importance of auxiliary information in inversion and how to choose parameters for an efficient and accurate inversion model.

    Inverting Large Datasets

    This episode is 2 of a 5 part series on inversion best practices. In this video, you'll learn about acceleration settings in VOXI and how they can improve the inversion of large datasets.

    Impactful Constraints

    This episode is 3 of a 5 part series on inversion best practices. In this video, you'll learn about how constraints can impact your inversion in VOXI.

    Understanding MVI

    This episode is 4 of a 5 part series on inversion best practices. In this video you'll see why we recommend including magnetization vector inversions in your interpretations of magnetic data. You'll also learn about the MVI component outputs, with a synthetic example, so that you can explore an additional solution space with a new perspective and arrive at the best possible interpretation utilising all the tools at hand.

  • IP and Resistivity Inverse Modelling

    3D Inversion of Late-Time Voltage

    Using the calculated response of a synthetic example, you will learn how to invert dipole-dipole Vp data to create a 3D conductivity model.

    3D Inversion of Apparent Chargeability

    Using the calculated response of a synthetic example, you will learn how to invert dipole-dipole apparent chargeability data to create a 3D chargeability model.

  • IP and Resistivity Forward Modelling

    Forward Modelling the Apparent Chargeability

    Using a synthetic example, you will learn how to forward model the apparent chargeability for a dipole-dipole survey.

    Forward Modelling the Late-Time Dipole-Dipole Voltage

    Using a synthetic example, you will learn how to forward model the late-time voltage (Vp) for a dipole-dipole survey.

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