The JD-03 pipe is a kimberlite diatreme in Nunavut, Canada, located 7 km (4 mi) from the Jericho Diamond Mine. It was discovered in 1996 and is interpreted to be pyroclastic with intense serpentinization.
The JD-03 pipe formed by an explosive eruption when this part of Nunavut was volcanically active. In addition, it contains several crustal xenoliths including limestone and granite.
References
JD-03 pipe Wikipedia(Text) CC BY-SA