Diabase Arm is a Bay located in Mackenzie, Northwest Territories and has an elevation of 295 meters.

• Latitude: 64° 6' 1'' North   (decimal: 64.1002415)
• Longitude: 115° 11' 5'' West   (decimal: -115.1847082)
• Topography Feature Category: Bay
• Geographical Feature: Arm
• Canadian Province/Territory: Northwest Territories
• Elevation: 295 meters
• Location: Mackenzie
• Atlas of Canada Locator Map: Diabase Arm
• GPS Coordinate Locator Map: Diabase Arm Lat/Long