A diatreme is a volcanic pipe or vent formed by a gas-charged explosive eruption that blasts through the Earth’s crust, creating a steep-sided, often funnel-shaped, breccia-filled conduit. Diatremes are commonly associated with kimberlite pipes, which can contain diamonds. They are significant in the study of volcanology and economic geology, particularly in diamond exploration.
Source Kjarsgaard, B. A., & Levinson, A. A. (2002). “Diamonds in Canada.” Geoscience Canada, 29(2), 71-84.