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Gold/Mining/Energy : Montello Resources -- Ignore unavailable to you. Want to Upgrade?

To: FRANK KENDRICK who wrote (1493)	2/7/1998 5:02:00 PM
From: Jesse	Read Replies (1) \| Respond to of 4256

Kimberlitic rock is generally bluish, greenish or black. Typically in So.Africa, our epitomical mother, it's blue or bluish-green (unweathered, ie). The presence of olivine (magnesium iron silicate, -peridotite associated) can lend towards the green, etc ... - - - Go here for a "Virtual field trip" to the Rockies, w/ actual photos of kimberlite hand-samples, and kimb.-outcroppings (from RMAG): rmag.org (RMAG = "Rocky Mountain Association of Geologists") ---------- Learn about IGNEOUS ROCKS AND PROCESSES: arbuckle.utulsa.edu Classifications: Dark colored [kimberlite] - A Peridotite contains Olivine, Pyroxene, and some Calcium Plagioclase Feldspar. - - - - - - Kimberlite- A highly serpentinized porphyritic peridotite, commonly brecciated, which occurs in vertical pipes, dikes, and sills. It is the principal original environment of diamond, but only a small percentage of the known kimberlite occurrences are diamondiferous. See also: "blue ground"; "yellow ground". The name is derived from Kimberley, South Africa. (from: imcg.wr.usgs.gov ) Blue ground: Unoxidized slate-blue or blue-green kimberlite, usually a breccia (as in the diamond pipes of South Africa) that is found below the surficial oxidized zone of "yellow ground." "Kimberlites are serpentinized mica peridotites that contain a variety of high pressure minerals, including diamonds." ---------- Olivine: luigi.calpoly.edu geology.wisc.edu mineral.galleries.com minerals.gps.caltech.edu ---------- ------ Gordon, you were wanting info re. AB fault structure, etc-- try this link to learn a lil about just that: geop.ubc.ca --- Cheers, -j :>