To: Len Hynes  who wrote (99 ) 11/5/1999 9:47:00 AM From: jerry janko     Read Replies (1)  | Respond to    of 123  
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.