Drilling is a critical activity in mineral exploration. There are several types of drilling.
- Diamond drilling is the most common type of drilling conducted in Ontario. It produces cylindrical pieces of rock called core.
- Reverse circulation or rotary drilling produces chips ofrock.
- Overburden drilling is conducted to sample glacial deposits.
- Augur drilling is used to sample soils for geotechnical purposes.
- Geological mapping
- Geophysical surveys
All drilling activities provide samples from below thesurface. This allows for the testing of the properties of the soil and rocks, including mineral and metal content.