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Post by Franko10 ™ on Jan 31, 2005 14:21:06 GMT -5
Kensington Resources Ltd.: Large Diamonds Recovered From Fort A la Corne Kimberlite 140/141
VICTORIA, British Columbia--(BUSINESS WIRE)--June 17, 2003
Kensington Resources Ltd. (the "Company") is pleased to announce diamond recovery results for the 2002 minibulk program by the Fort a la Corne Joint Venture. The operator, De Beers Canada Exploration Inc., notified the Company of results arising from final diamond recovery activities at their secure facility located in Johannesburg, South Africa. Minibulk samples were acquired from the drilling phase of the 2002 advanced exploration/evaluation program on Kimberlite 140/141, one of several high-priority bodies identified in the Fort a la Corne Kimberlite Field located 65 kilometres east of Prince Albert, Saskatchewan.
Significant large stone recoveries in the 2002 macrodiamond results included recovery of five diamonds with weights of 10.23 carats, 3.61 carats, 2.595 carats, 2.57 carats, and 1.820 carats, respectively.
"These recoveries provide a major step forward for the project and will have a positive impact on planning for the 2003 evaluation program," commented David H. Stone, President of Kensington Resources. "The results strongly support the previously forecasted large stone potential of the 140/141 kimberlite by De Beers".
A total of 664 macrodiamonds (greater than 1.5 mm screen cutoff), collectively weighing 93.060 carats were recovered from close to 1,272 tonnes of excavated (actual mass as calculated from downhole caliper tool measurements) kimberlite. Of this total, approximately 53 of recovered diamonds are larger than 0.25 carats and together account for 45% of the total weight. A summary of the large stone recoveries is shown in Table 1.
Table 1: Summary of 2002 Large Diamond Recovery
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Size Range Carats Number of Stones
--------------------------------------------------------------------
Stones greater than 1.0 carat 23.030 7
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Stones between 0.75 - 0.99 carats 2.610 3
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Stones between 0.50 - 0.74 carats 4.070 7
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Stones between 0.25 - 0.49 carats (a) 12.195 36
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Total Stones greater than 0.25 carats 41.905 53
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(a) Diamond weights are provided in terms of total carats per sieve
class. The reader is cautioned that for seven interval samples
(12 metres) with multiple stone recoveries, the number of stones
in the 0.25 - 0.49 carat range was estimated by dividing total
carat weight by the number of stones in the +11 sieve class.
This caution also applies to figures quoted in the text for
number of stones greater than 0.25 carat.
Macrodiamond recoveries are grouped into four main areas of the 140/141 body. Drillhole results are shown for each of these areas in Table 2.
The three - 36 inch (914 mm) diameter reverse circulation drillholes, which include 141-30, 141-31, and 141-32 were located less than 20 metres apart and all were proximal to a large diameter reverse circulation drillhole (LDDH) 141-04 (609 mm, 24 inch diameter) drilled in 2000, an NQ corehole 141-29 drilled in 2002, and a PQ corehole also drilled in 2003. The coreholes provided an uninterrupted record of the geology of the kimberlite in this area as well as samples for microdiamond recovery utilizing caustic dissolution methods. LDDH 141-04 previously returned favourable macrodiamond recoveries (169 stones greater than 1.0 mm collectively weighing 12.84 carats). In 2002, a total of 450 macrodiamonds weighing 48.24 carats was recovered from a combined mass of 729.0 tonnes of excavated material from these three drillholes. Thirty stones larger than 0.25 carats were recovered throughout the kimberlite intersections from 130 metres downwards. The largest stone found in these holes was 1.045 carats in weight and was recovered from LDDH 141-32. The average actual sample grade for the three holes was 6.617 cpht and most stones were recovered from below 130 metres depth in fine- to coarse-grained parts of the mega-graded bed, a feature common in the 141 sector of the combined body.
LDDH 141-33 (609 mm or 24 inch diameter) intersected very fine- to coarse-grained olivine-rich pyroclastic kimberlite not previously tested by minibulk samples for macrodiamond content or modeled to determine a grade forecast. A total of 43 macrodiamonds collectively weighing 16.525 carats was recovered from 176.5 tonnes of excavated kimberlite. Recently, a 10.23 carat diamond was recovered from this drillhole and reported as a dodecahedral aggregate stone with two dimensions measuring 14 mm x 10.5 mm. This diamond is better described as a partially resorbed, complex stone showing evidence of internal twinning and local concentrations of inclusions. The stone was recovered between 178-190 metres depth. No conclusive information is available at this time concerning value of the stone or the potential impact on grade forecasts and average values for body 140/141, although the stone currently is undergoing valuation by De Beers experts. This intersection of kimberlite was comparatively homogeneous in terms of lithology and six other stones larger than 0.25 carats were recovered from various depths within the kimberlite including a 0.835 carat stone, which was recovered from between 262-274 metres depth.
Core drilling during the 2002 program indicated the presence of thick beds of coarser-grained xenolithic kimberlite breccias. Large diameter drillholes 140-29 and 140-30 (609 mm or 24 inch diameter) intersected these prospective beds among other kimberlite phases predominantly in the south and central parts of the combined body. A total of 127 macrodiamonds weighing 23.95 carats was recovered from 184.98 tonnes of excavated kimberlite from the two drillholes. Of this, 14 stones are larger than 0.25 carats including the five largest at 3.61 carats, 2.57 carats, 2.59 carats, 1.82 carats, and 1.16 carats, respectively.
VICTORIA, British Columbia--(BUSINESS WIRE)--June 17, 2003
Kensington Resources Ltd. (the "Company") is pleased to announce diamond recovery results for the 2002 minibulk program by the Fort a la Corne Joint Venture. The operator, De Beers Canada Exploration Inc., notified the Company of results arising from final diamond recovery activities at their secure facility located in Johannesburg, South Africa. Minibulk samples were acquired from the drilling phase of the 2002 advanced exploration/evaluation program on Kimberlite 140/141, one of several high-priority bodies identified in the Fort a la Corne Kimberlite Field located 65 kilometres east of Prince Albert, Saskatchewan.
Significant large stone recoveries in the 2002 macrodiamond results included recovery of five diamonds with weights of 10.23 carats, 3.61 carats, 2.595 carats, 2.57 carats, and 1.820 carats, respectively.
"These recoveries provide a major step forward for the project and will have a positive impact on planning for the 2003 evaluation program," commented David H. Stone, President of Kensington Resources. "The results strongly support the previously forecasted large stone potential of the 140/141 kimberlite by De Beers".
A total of 664 macrodiamonds (greater than 1.5 mm screen cutoff), collectively weighing 93.060 carats were recovered from close to 1,272 tonnes of excavated (actual mass as calculated from downhole caliper tool measurements) kimberlite. Of this total, approximately 53 of recovered diamonds are larger than 0.25 carats and together account for 45% of the total weight. A summary of the large stone recoveries is shown in Table 1.
Table 1: Summary of 2002 Large Diamond Recovery
--------------------------------------------------------------------
Size Range Carats Number of Stones
--------------------------------------------------------------------
Stones greater than 1.0 carat 23.030 7
--------------------------------------------------------------------
Stones between 0.75 - 0.99 carats 2.610 3
--------------------------------------------------------------------
Stones between 0.50 - 0.74 carats 4.070 7
--------------------------------------------------------------------
Stones between 0.25 - 0.49 carats (a) 12.195 36
--------------------------------------------------------------------
Total Stones greater than 0.25 carats 41.905 53
--------------------------------------------------------------------
(a) Diamond weights are provided in terms of total carats per sieve
class. The reader is cautioned that for seven interval samples
(12 metres) with multiple stone recoveries, the number of stones
in the 0.25 - 0.49 carat range was estimated by dividing total
carat weight by the number of stones in the +11 sieve class.
This caution also applies to figures quoted in the text for
number of stones greater than 0.25 carat.
Macrodiamond recoveries are grouped into four main areas of the 140/141 body. Drillhole results are shown for each of these areas in Table 2.
The three - 36 inch (914 mm) diameter reverse circulation drillholes, which include 141-30, 141-31, and 141-32 were located less than 20 metres apart and all were proximal to a large diameter reverse circulation drillhole (LDDH) 141-04 (609 mm, 24 inch diameter) drilled in 2000, an NQ corehole 141-29 drilled in 2002, and a PQ corehole also drilled in 2003. The coreholes provided an uninterrupted record of the geology of the kimberlite in this area as well as samples for microdiamond recovery utilizing caustic dissolution methods. LDDH 141-04 previously returned favourable macrodiamond recoveries (169 stones greater than 1.0 mm collectively weighing 12.84 carats). In 2002, a total of 450 macrodiamonds weighing 48.24 carats was recovered from a combined mass of 729.0 tonnes of excavated material from these three drillholes. Thirty stones larger than 0.25 carats were recovered throughout the kimberlite intersections from 130 metres downwards. The largest stone found in these holes was 1.045 carats in weight and was recovered from LDDH 141-32. The average actual sample grade for the three holes was 6.617 cpht and most stones were recovered from below 130 metres depth in fine- to coarse-grained parts of the mega-graded bed, a feature common in the 141 sector of the combined body.
LDDH 141-33 (609 mm or 24 inch diameter) intersected very fine- to coarse-grained olivine-rich pyroclastic kimberlite not previously tested by minibulk samples for macrodiamond content or modeled to determine a grade forecast. A total of 43 macrodiamonds collectively weighing 16.525 carats was recovered from 176.5 tonnes of excavated kimberlite. Recently, a 10.23 carat diamond was recovered from this drillhole and reported as a dodecahedral aggregate stone with two dimensions measuring 14 mm x 10.5 mm. This diamond is better described as a partially resorbed, complex stone showing evidence of internal twinning and local concentrations of inclusions. The stone was recovered between 178-190 metres depth. No conclusive information is available at this time concerning value of the stone or the potential impact on grade forecasts and average values for body 140/141, although the stone currently is undergoing valuation by De Beers experts. This intersection of kimberlite was comparatively homogeneous in terms of lithology and six other stones larger than 0.25 carats were recovered from various depths within the kimberlite including a 0.835 carat stone, which was recovered from between 262-274 metres depth.
Core drilling during the 2002 program indicated the presence of thick beds of coarser-grained xenolithic kimberlite breccias. Large diameter drillholes 140-29 and 140-30 (609 mm or 24 inch diameter) intersected these prospective beds among other kimberlite phases predominantly in the south and central parts of the combined body. A total of 127 macrodiamonds weighing 23.95 carats was recovered from 184.98 tonnes of excavated kimberlite from the two drillholes. Of this, 14 stones are larger than 0.25 carats including the five largest at 3.61 carats, 2.57 carats, 2.59 carats, 1.82 carats, and 1.16 carats, respectively.
