chrome diopside


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chrome diopside

[′krōm dī′äp‚sīd]
(mineralogy)
A bright green variety of diopside containing a small amount of Cr2O3.
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The area was identified on the basis of historic sampling, by the Saskatchewan Geological Survey and the Geological Survey of Canada in the early 1990's that recovered high counts of kimberlite indicator minerals including significant concentrations of pyrope and eclogitic garnets, chrome diopside and oxides covering a large aerial extent of unglaciated terrain.
To investigate this, probe mounts containing 307 garnet grains and 25 chrome diopside grains were dispatched to the Euclid Geometrics Laboratory in Kitchener, Ontario, for microprobe analysis.
In addition to the good concentrations of pyrope garnet, chrome diopside, chromite and picroilmenite, much of the McGarry Property kimberlite mineral anomaly is composed of large grains of 'fresh' fosterite olivine which are believed to be derived from one or more local kimberlite sources.
of the pipe that were rich in chrome diopside and pyrope and contained lesser
The detailed chemical analysis of a selection of the positive grains suggests the elevated counts are from one source and confirmed the presence of G10 and G9 and G1 garnet, picroilmenite, forsteritic olivine and chrome diopside.
The initial laboratory results have confirmed pyrope, chrome diopside and sapphire.
garnets, spinel, picro-ilmenite and chrome diopside.
After splitting of these grains to a representative fraction, 40 garnet grains, 12 chrome diopside grains and 50 ilmenite grains were mounted for electron microprobe analysis:- these are marked as the RC set.
The current Phase 2 exploration program will focus on reconnaissance and follow-up stream sampling in key target areas, with a view toward locating and identifying further kimberlitic indicator minerals such as ilmenite, chromite, pyrope garnet and chrome diopside.
These trains are characterized by varying amounts of fresh (near source) grains of pyrope and eclogitic garnets, chrome diopside, picroilmenite and olivine contained within glacial deposits.
Recovery of kimberlitic garnet and chrome diopside suggests a kimberlite source maybe located within a few kilometers due to the destruction of these grains over short travel distances in the tropical environment that prevails in Liberia.