Salt Dome

This example is devoted to demonstration of basic IGMAS+ functionality on a synthetic model of a salt dome.

Description

Model

The model contains seven units, names and densities are given in the Table below.

Name	Density
Tertiary	2.17 t/m$^3$
Cretacious	2.27 t/m$^3$
Jurassic	2.37 t/m$^3$
Triassic	2.47 t/m$^3$
Caprock	2.87 t/m$^3$
Zechstein	2.07 t/m$^3$
Permian	2.57 t/m$^3$

The Zechstein unit forms a salt dome starting at a depth of around 6 km and going up to around 2 km in the center of the model domain (see Figure below).

Vertical cross-section through the salt dome model.

There is a horizontal extension of the bodies of 500 km in each side beyond the station boundaries (20 $\times$ 12 km).

The reference density is 2.32 t/m$^3$.

3D View of the salt dome model.

Input data

The described model was used to create a gravity dataset calculated for a set of 273 stations regularly placed on the plane at a zero depth level (see Figure below).

Bouguer anomaly modelled above a salt dome model measured with a regularly spaced set of stations placed at a zero depth level.

Stations cover the area 20 $\times$ 12 km.

Download

The input data related to this example are available for download here.

The share contains several files:

• Salt_Dome_Measured_Gravity.csv: the input measured gravity data in CSV format
• Salt_Dome.zip: the IGMAS+ model
• Salt_Dome.vxo: the voxel cube with densities obtained by voxelization of the model
• Salt_Dome_Seismic_Image.jpg: an example of a seismic section image in JPG format.

The input gravity data file Salt_Dome_Measured_Gravity.csv is in CSV format and has 4 data columns: "x" "y" "z" "measured z component" and 6561 data rows corresponding to stations.
The values in columns are delimited with space.

The model is a zip archive with the IGMAS+ project. Simply unpack and load the project in IGMAS+.

The project is also distributed together with IGMAS+ under name project_salt.
You can open it if you navigate to the folder with IGMAS+ installation, e.g. C:\Users\user\IGMAS+\bin\.
There, open folder example\ and open project project_salt (see Figure below).

Find the Salt Dome example project inside the IGMAS+ installation folder.