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Gold/Mining/Energy : MARUM RESOURCES ON ALBERTA -- Ignore unavailable to you. Want to Upgrade?

To: Jesse who wrote (566)	4/15/1998 5:29:00 PM
From: Jesse	Read Replies (1) \| Respond to of 2514

Read the abstract of the Ashton/AEC paper given at the IKC in South Africa yesterday: victoryventures.com "The Buffalo Hills Kimberlite Province, North-central Alberta, Canada" BY: Carlson, S.M.1, Hiller, W.D.1, Hood, C.T.1, Pryde, R.P.2, and Skelton, D.N.1 ..Volcanic stratigraphy is dominated by lapilli-bearing olivine crystal tuffs, occasionally with well-defined, generally normally-graded beds varying from coarse ash to coarse crystal. Juvenile lapilli-rich beds and rare autoliths have also been noted, particularly in kimberlites K6, K91, and K14, and minor interfingering sedimentary beds have been identified in drill holes from several pipes... Crytsal xenoliths are typically shales of the Shaftesbury formation and commonly display margins embayed by olivine grains, suggesting an un- or semi-lithified state (for the host rock) during kimberlite emplacement... Petrographic examination of the macrocryst mineralogy of the Buffalo Hills kimberlites reveals a preponderance of olivine, which occurs as ovoid grains up to one centimeter in length, and as smaller, generally subhedral grains. Olivines are typically pseudomorphed by magnetite and calcite at higher levels, ranging through to serpentine, calcite, and pyrite at depth and into fresh olivine in the most unaltered material. Mica is an occasional constituent of the macrocryst assemblage, appearing as laths up to 5 mm in length. An unusual greenish mineral (possibly antigorite plus chlorite) is abundant in some pipes, occurring as platy, sometimes vermiform grains up to 15 mm in length... ____________________________ Lots more at the above link! -j :>