|The North American Craton showing regions of favorability for conventional |
host rocks. The diamond shapes are locations for reported diamond finds
From Hausel (1998).
|Contact between kimberlite & granite|
shows no evidence of baking. The
contact is knife sharp and the adjacent
granitic rocks show no alteration. This
could only happen if the kimberlitic
magma was cool upon emplacement.
|Ellendale 7 diamondiferous lamproite|
exposed in dozer trench. This commercial
pipe was hidden under a few feet of soil.
|Argyle diamond mine in 1986 shortly after discovery. This became the|
largest producing diamond mine in the world, for many years.