9. A to Z Examples¶

What is this?

A to Z examples is a collection of step by step tutorials for completing projects using GIFtools - from forward modeling to inversion, and everything in between. Each tutorial is broken down into a set of linear steps that make use of the recipes. All tutorials and relevant files are available for download. By completing the tutorials from A to Z, you will rapidly become proficient users of GIFtools and the large library of UBC-GIF codes.

Tutorials are organized by geophysical method:

However, much of the functionality provided within GIFtools is applicable to multiple methods (e.g. adding geological constraints to inversions).

Tip

To alter a step in any of the tutorials (e.g. use an OcTree mesh instead of a tensor mesh), search the recipes section or try the search bar.

7-step process applied to TKC kimberlite complex

A to Z: Synthetic TKC

For consistency, A to Z examples for each geophysical method consider the same geological model; the Tli Kwi Cho (TKC) kimberlite complex in NWT, Canada. The UBC-GIF Team has worked extensively on the TKC area. For background about the deposits, the geophysical surveys, and the outcome (including a combined petrophysical model), see the Case History on EM Geosci.

The TKC kimberlite complex has been surveyed with a variety of systems (see here) and drilled extensively. As a result, we have a very good understanding of the geological units which make up the deposit, their margins and their physical properties. The average density, susceptibility and electrical conductivity for geological units at TKC is shown in the table below.

Unit

$$\rho$$ [g/cc]

$$\kappa$$ [SI]

Remanence

$$\sigma$$ [mS/m]

$$\eta$$ [ms]

Granitic Host

0

0

x

x

x

XVK/DO-18

-0.24

0.002

x

x

x

Kimberlite/HK

-0.24

0

x

x

x

HK/DO-27

-0.24

0.006

x

x

x

VK/DO-27

-0.24

0.003

x

x

x

PK/DO-27

-0.24

0.003

x

x

x

Till

0

0

x

x

x

• PK: pyroclastic kimberlite

• HK: hypabyssal kimberlite

• VK: volcaniclastic kimberlite

• XVK: xenocryst-rich volcaniclastic kimberlite