How about this NR, WOW!~
Copper Hill discovers kimberlite on Northern Labrador claims
Copper Hill Corp CUHL
Shares issued 16,647,140 Nov 4 close $0.18
Fri 5 Nov 99 News Release
Mr. Earl Benson reports
Kimberlites have been discovered on the company's claims in Northern
Labrador-Nunavut. In September, 1998, Copper Hill geologists sampled six of
eight known dykes previously mapped by government geologists as ultramafic
lamprophyres. Petrography and mineralogy both confirmed the presence of
diamond indicator minerals within at least two separate kimberlite dykes.
These results are significant, since they are the first kimberlite dykes
discovered in Northern Labrador.
Copper Hill is extremely encouraged by these findings and note that they
are located in the same vicinity as the significantly diamondiferous
kimberlite dykes very recently reported by Twin Gold Corporation just
across the provincial border in Northern Quebec.
In May, 1999, the samples, including bedrock, stream sediments and one soil
were split and sent to Kennecott Canada Exploration Inc. laboratory in
Thunder Bay, Ont. A description of the mineralogical and chemical
particulars are deferred to the underlying footnote.
Based on the petrology to date, at least two of the six dykes sampled are
kimberlites, and the remainder were classified as lamprophyres, though they
have some mineralogical features in common with the kimberlites.
Significantly, Kennecott's in-house discriminatory curves for pyroxene
separates show that the geotherm for the dykes is permissive for diamond
preservation.
Footnote
Sampling and mineralogical/chemical particulars
The initial sampling conducted by Copper Hill was of a reconnaissance
nature, designed to determine whether the dykes were kimberlitic and not to
test their diamond potential at that stage. The rock samples were less than
20 kilograms and collected from single sites within a dyke, and the stream
and soil samples were less than five kilograms. The stream sediment samples
are still being analyzed.
All the samples were processed at Kennecott for greater than 0.25 of a
millimetre diamond indicator minerals and the rock samples also underwent
petrological examination. The heavy mineral concentrates from these two
dykes confirmed that they also contained diamond indicator minerals. These
minerals included fosteritic olivine, G9 lherzolite garnet, eclogitic
garnet, megacrystic garnet, clinopyroxene, orthopyroxene, ilmenite and
chromite, a classic kimberlite suite.
The diamond indicator minerals were sent to R.L. Barnett Geological
Consultants of London, Ont., for analysis by electron microprobe, which
confirmed the presence of the above material. Kennecott also reported the
clinopyroxene and orthopyroxene chemistry, based on an in-house
geothermobarometer plot within the temperature and pressure field of
diamond. Also, Kennecott reports that the soil geochemical sample collected
over one dyke yielded significant pyrope, chrome diopside and olivine.
Kennecott recommended that Copper Hill collect more sample for caustic
fusion to check for the presence of diamonds. Copper Hill plans an
aggressive exploration and sampling program during which samples with a
minimum of 150 kilograms will be collected from each site and detailed down
ice stream, soil and till sampling will be completed.
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