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About

GPEXAirborne geophysics

From evidenceto insight.

Explore the evidence.
Understand how assumptions shape the map.

Explore the map Discover the research

North-western Zambia

Scroll to explore Evidence. Interpretation. Perspective.

01The research

A new perspective
on the evidence.

Explore what airborne geophysics can reveal. Bring magnetics, radiometrics and gravity into one workspace, then examine how different interpretations change the picture.

Evidence layers
07layers
Curated scenarios
08scenarios
Robustness scenarios
900variations
Common analysis grid
20metres

01Explore the evidence

Start with what
is measured.

Inspect seven evidence layers derived from airborne magnetics, radiometrics and gravity. Explore their spatial patterns on a common 20 m grid before interpreting them together.

Explore evidence

02Question the assumptions

Change the weights.
See the difference.

Compare eight curated scenarios, or build your own with transparent FAHP judgements. Trace how weighting choices alter relative exploration favourability.

Compare scenariosBuild your own

03Understand the sensitivity

Ask what
stays consistent.

Examine agreement across 900 robustness scenarios. Understand which patterns persist as the weights change, and where the interpretation is more sensitive.

Explore sensitivity

02Your workspace

Follow your
next question.

Move from a first observation to a considered interpretation. Every part of the workspace keeps the evidence and your assumptions within reach.

01ExploreInspect evidence layers and prospectivity scenarios. 02CompareSee how scenarios differ, side by side. 03Model BuilderMake weighting choices explicit. Create your own scenario. 04SensitivityUnderstand agreement, variation and robustness.

03About GPEX

Make the reasoning
part of the result.

GPEX is a research application for exploring airborne geophysical data and scenario-based mineral prospectivity in north-western Zambia.

It brings evidence, weighting assumptions and sensitivity analysis into a shared workspace, helping geophysics experts examine how their interpretations shape the outcome.

Developed by Emily Wood
Final-year Geomatics Research Project
Geomatics Department
University of Cape Town · 2026

Start exploring
A transparent research prototype

Outputs express relative exploration favourability. They are not probabilities of mineral occurrence or confirmation of a mineral deposit.