Initial Gravity Concentration Tests Yield up to 99.4 Percent Gold Recovery
Mon Jul 28, 9:02 AMVANCOUVER, July 28 /PRNewswire-FirstCall/ - Harp Sangha, President/CEO of Douglas Lake Minerals (OTC BB: DLKM / Frankfurt: D60.F) is pleased to announce the results from preliminary gravity concentration test work completed on three samples of gold bearing alluvial material from the Company's wholly owned Mbwemkuru Alluvial Gold Project located in the Lindi region in Southeastern Tanzania. The test work was completed by Met-Solve Laboratories of Vancouver, BC.
HIGHLIGHTS:
Test work completed on two samples of field concentrate and one of surface sand with a combined weight of 26.2kg using a Falcon concentrator and a two stage recovery process. The two stage recovery process consisted of running material through the Falcon concentrator and then running the tailings through as the second stage.
The calculated head grades (the g/t grade of the material before processing) of the three samples were 193.1 g/t and 61.8 g/t from the field concentrate and 1.69 g/t of surface sand.
Total gold recovery from the two stage process ranged from 94.7% to 99.4% for the three samples
ICP analysis of the samples indicated strongly anomalous contents of combined Uranium and Thorium with the highest combined U/Th value of 828 ppm associated with the field concentrate that produced a calculated head grade of 61.8 g/t.
The results of the gravity processing are as follows:
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Client: Douglas Lake Date: 05-Jun-08
Test: TE101 Project: MS1099
Sample: Falcon Sample B
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Products Weight Assay (g/tonne) Distribution
(g) (%) Au Au
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Pan Concentrate 1 7.02 0.06 268,271.0 84.6
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Pan Tail 1 107.96 0.94 181.3 0.9
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SB40 Concentrate 1 114.98 1.00 16,549.3 85.5
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Pan Concentrate 2 5.07 0.04 39,817.0 9.1
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Pan Tail 2 108.42 0.94 32.3 0.2
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SB40 Concentrate 2 113.49 0.98 1,809.6 9.2
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Total SB40
Concentrate 228.47 1.98 9,227.5 94.7
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SB40 Tails 11,303.60 98.02 10.5 5.3
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Calculated Head 11,532.07 100.00 193.1 100.0
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Client: Douglas Lake Date: 05-Jun-08
Test: TE102 Project: MS1099
Sample: Falcon Sample C
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Products Weight Assay (g/tonne) Distribution %
(g) (%) Au Au
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Pan Concentrate 1 1.90 0.04 124,086.0 78.8
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Pan Tail 1 102.90 2.12 14.4 0.5
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SB40 Concentrate 1 104.80 2.16 2,263.8 79.3
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Pan Concentrate 2 1.50 0.03 33,611.0 16.8
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Pan Tail 2 113.40 2.34 30.1 1.1
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SB40 Concentrate 2 114.90 2.37 468.5 18.0
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Total SB40
Concentrate 219.70 4.53 1,324.8 97.2
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SB40 Tails 4,627.90 95.47 1.8 2.8
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Calculated Head 4,847.60 100.00 61.8 100.0
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Client: Douglas Lake Date: 05-Jun-08
Test: TE103 Project: MS1099
Sample: Falcon Sample A
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Products Weight Assay (g/tonne) Distribution %
(g) (%) Au Au
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Pan Concentrate 1 2.94 0.03 5,307.00 93.9
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Pan Tail 1 101.90 1.03 0.63 0.4
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SB40 Concentrate 1 104.84 1.06 149.44 94.3
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Pan Concentrate 2 1.49 0.02 477.90 4.3
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Pan Tail 2 101.70 1.03 1.36 0.8
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SB40 Concentrate 2 103.19 1.05 8.24 5.1
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Total SB40
Concentrate 208.03 2.11 79.40 99.4
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SB40 Tails 9,641.20 97.89 0.01* 0.6
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Calculated Head 9,849.23 100.00 1.69 100.0
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* Below detection, 0.01 g/tonne used
The Company will continue to test material from the Mbwemkuru property and assess the best equipment to maximize gold recovery during this phase of exploration, with the intent of bringing the property into near term production.
Mbwemkuru Alluvial Gold Project has recently been acquired by Douglas Lake. The property is in the SE margin of the Karoo Basin and covers an area of 430 square kilometers. To date one of the most significant prospects is an eight by two kilometer block, with high gold concentrations within a 1.0 to 1.5 meter zone in the gravel, which is open at depth.
Exploration of the Mbwenkuru prospect is currently underway, including volumetric pit sampling at spacing of 500m by 50m on the high grade zone along the Mbwemkuru River, as well as regional pit traverses every 2-4 km along the entire 22km strike with 100m spacing. Samples for testing will be taken every meter from each pit yielding 6-10 samples per pit. An ongoing mapping program at a scale of 1:50,000 over the entire license area.
"The exploration work completed to date, as well as the results and obvious efficiency of the Falcon equipment are very encouraging and have management focusing on developing a proven resource as well as bringing the Mbwemkuru property into production as soon as possible" stated Harp Sangha President/CEO
About Douglas Lake
DLKM is an emerging mineral exploration company focused on exploring and developing gold, copper, nickel, uranium, and diamond mining opportunities in Tanzania. For more information, go to www.douglaslakeminerals.com
This release contains forward-looking statements, which involve risks and uncertainties. Complete forward-looking statement available at www.douglaslakeminerals.com/forwardlooking.html
SOURCE Douglas Lake Minerals
135.14 (1.00%)
