This is a partially developed activity description. It is included in the collection because it contains ideas useful for teaching even though it is incomplete.

# Thermal cooling of a dike

*Eric Grosfils, Geology Department, Pomona College*

Topic: Volcanism, thermal diffusion

Course type: Upper level undergraduate course

## Description

The objective here would be to develop a model for the evolution of temperature in the wall rock adjacent to an intrusion. This could proceed in a number of ways and consider a number of variables (e.g., geothermal gradient, radioactivity, etc.), but at least to start I would envision this as an opportunity to implement a simple 1D (perhaps 2D) model of the process.

## Learning Goals or Outcomes

The goals here are as follows:

-- introduce students to diffusion, a key geological process, using a thermal framework

-- use this to explore a key problem in volcanology, i.e. thermal heat loss surrounding an intrusion (this has many offshoots, potentially... looking at metamorphic mineral zonation, etc.)

-- expose students to a different form of numerical modeling approach than those I introduce them to already

## How would you assess whether those goals have been met?

The central method for assessment would be a problem set exploring different aspects of the thermal diffusion process. Using STELLA, can students accurately predict, for different boundary conditions, the thermal perturbation introduced into host rock by an intrusion?

## References

To develop this material I'd likely draw from the discussion of this problem formulation in Turcotte and Schubert's text "Geodynamics"