|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