LSG... Lake Shore drills 108.8 m of 7.57 g/t Au at Thunder
2011-07-26 04:27 MT - News Release
Mr. Tony Makuch reports
LAKE SHORE GOLD CONTINUES TO DEFINE AND EXTEND MINERALIZATION AT THUNDER CREEK, POTENTIAL NEW ZONE DISCOVERED 500 METRES ALONG TC-144 TREND
Lake Shore Gold Corp. has released results from 29 drill holes (11,330 metres) from the Thunder Creek project with 15 holes (2,799 metres) being collared underground near the 730 level and 14 holes (8,531 metres) being collared on surface. The holes are part of a continuing drill program to increase drill hole density at the Thunder Creek deposit for the new National Instrument (NI) 43-101 estimate due later this year as well as to explore for new deposits along strike.
Highlights
- Underground drilling confirms and extends mineralization above and below 730 level, key intercepts include:
- 7.57 grams per tonne (g/t) over 108.80 metres;
- 7.01 g/t over 112.70 metres;
- 4.70 g/t over 145.70 metres;
- 5.21 g/t over 49.70 metres, including 8.11 g/t over 24.90 metres and 3.70 g/t over 12.25 metres;
- 2.30 g/t over 120.55 metres;
- 10.19 g/t over 55.00 metres, including 18.95 g/t over 20.50 metres and 4.90 g/t over 50.80 metres;
- Underground drilling near northeast tip of Porphyry zone on 730 level extends mineralization by minimum 25 metres:
- Intersections include 3.62 g/t over 40.50 metres, 7.24 g/t over 6.30 metres and 2.53 g/t over 23.90 metres;
- Infill drilling from surface confirms mineralization between 500- and 630-metre levels:
- Key intersections include 5.65 g/t over 69.90 metres, 4.17 g/t over 29.60 metres and 7.75 g/t over eight metres;
- Exploration surface drilling extends mineralization and discovers potential new zone 500 metres to the southwest:
- Drilling near southwest limit of current resource model extends zone by 25 metres, remains open, among intersections are 6.72 g/t over 8.90 metres, 11.49 g/t over five metres and 9.1 g/t over two metres;
- Wide-spaced exploration drilling 500 metres to southwest of Thunder Creek deposit intersects 8.07 g/t over 2.10 metres, demonstrates potential for new discoveries along TC-144 trend.
Tony Makuch, president and chief executive officer of Lake Shore Gold, commented: "Today's results continue to provide us with a very positive outlook on the Thunder Creek deposit and its potential. Drilling is proceeding well with infill holes extending mineralization above and below the 730 level. As well, the discovery of a potential new zone 500 metres from the Thunder Creek deposit highlights the excellent opportunity that exists for new discoveries along the TC-144 trend. We are continuing our aggressive drill program at Thunder Creek with 12 drills currently active in support of our efforts to establish an initial NI 43-101 report later this year and to pursue expansion of the Thunder Creek deposit toward 144."
Underground drilling confirms and extends mineralization above and below 730 level
Holes drilled to test above the 730 level covered up to the 650 level and provided strong confirmation of the upward continuity of previously obtained wide, high-grade intercepts in horizontal holes on the 730 level. Key intercepts include 7.75 g/t over 108.80 metres in 730-012, 4.70 g/t over 145.70 metres in 730-010, 10.19 g/t over 55.00 metres, including 18.95 g/t over 20.50 metres, and 4.90 g/t over 50.80 metres in 730-011 and 5.21 g/t over 49.70 metres, including 8.11 g/t over 24.90 metres and 3.70 g/t over 12.25 metres, in 710-001.
Results of drilling below the 730 level covered the mineralized zone to a maximum depth of 900 metres below the level and were also highly successful. Key intercepts from below the level included 7.01 g/t over 112.70 metres in 730-013, 2.30 g/t over 120.55 metres in 730-030 and 4.21 g/t over 9.10 metres and 0.90 g/t over 91.30 metres in 650-007.
Underground drilling near northeast tip of Porphyry zone on 730 level extends mineralization by minimum 25 metres
Drilling near the northeast limit of the Porphyry zone on the 730 level was designed to test for a possible extension of the zone and was also successful, extending the zone by a minimum of 25 metres. Results include 3.62 g/t over 40.50 metres in 730-014, 7.24 g/t over 6.30 metres in 730-024 and 2.53 g/t over 23.90 metres in 730-029. Including the results of these new holes the total strike length of the zone on the 730 level now stands at a minimum of 200 metres.
Infill drilling from surface confirms mineralization between 500- and 630-metre levels
Significant results from the infill drilling include 4.17 g/t over 29.60 metres in TC08-054d, 7.75 g/t over eight metres in TC08-054b and 5.65 g/t over 69.90 metres, including 10.45 g/t over 21.60 metres in TC11-112. These holes intersected mineralization approximately 200 metres above the 730 level and confirm the continuity of thick, high-grade intersections toward the 350-metre level, which is one of the next areas scheduled for development.
Exploration surface drilling extends mineralization and discovers potential new zone 500 metres to the southwest
Among significant results from drilling to the southwest were 6.72 g/t over 8.90 metres, including 26.82 g/t over 1.40 metres in TC09-69k, 11.49 g/t over five metres in TC11-111b and 9.10 g/t over two metres in TC11-111a. All three holes were drilled on a section located 25 metres southwest of the current limit for the Thunder Creek deposit where there is little to no previous testing. TC09-69k intersected the zone approximately 200 metres above the 730 level, while TC11-111a and TC11-111b intersected mineralization approximately 100 to 150 metres above the 730 level. The potential to extend the zone farther to the southwest is considered excellent.
Additional results from drilling to the southwest included 8.07 g/t over 2.01 metres in TC10-085a, which was collared approximately 500 metres to the southwest of the Thunder Creek deposit. The intersection consisted of a 20-metre alteration zone containing local porphyry dikes, quartz veining and increased sulphides similar to the Thunder Creek deposit. It is considered highly significant as it confirms the southwest extension of the TC-144 trend and its potential to host additional new deposits.
Observations to date continue to confirm the continuity and grade of the Thunder Creek deposit and indicate a broad envelope of mineralization containing multiple higher-grade lenses in both the Rusk and Porphyry zones.
The broad envelope of mineralization has been traced from surface to a vertical depth of 1,000 metres and has an average strike length of approximately 200 metres and average width which varies between five and 100 metres. The bulk of the drilling to test the mineralized envelope zone has been concentrated on a 200-metre strike length between surface and the 800 level with results indicating excellent continuity and potential for further expansion.
Drilling is continuing at the Thunder Creek property with 12 drills, including four underground drills near the 300 level, four underground drills near the 730 level and four drills on surface. The deepest holes to test the zone to date are at a vertical depth of 1,000 metres and indicate that the Rusk and Porphyry zones are open to depth and that the porphyry stock hosting the Porphyry zone is increasing in size.
Quality control
The company's qualified person (QP) for the drilling being completed on the Thunder Creek property is Dean Crick, PGeo. As QP, he has prepared or supervised the preparation of the scientific or technical information and has verified the data disclosed in this press release. Mr. Crick is an employee of Lake Shore Gold.
Lake Shore Gold has a quality control program to ensure best practices in the sampling and analysis of all drill core. Assays have been completed at ALS Chemex (TC200 series holes) which uses a standard fire assay with a 30-gram aliquot. For samples that return a gold content greater than 10.0 g/t, the sample is reanalyzed via fire assay with gravimetric finish. Select mineralized sections of the Porphyry zone are analyzed using the metallics or screen fire assay technique. Drill core is saw cut, and half the core is sampled in standard intervals. The remaining half of the core is stored in a secure location. The drill core is transported in security-sealed bags to the ALS Chemex prep lab located in Timmins, Ont. The pulps from core that is sent to the ALS Chemex prep lab are then shipped to ALS Chemex assay laboratory in Vancouver, B.C. ALS Chemex is an ISO 9001-2000-registered laboratory preparing for ISO 17025 certification.
THUNDER CREEK -- SIGNIFICANT ASSAY RESULTS Hole From To Grade Width No. m m g/t m 710-001 207.00 256.70 5.21 49.70 Including 225.60 250.50 8.11 24.90 And 272.90 285.15 3.70 12.25 650-007 334.00 343.10 4.21 9.10 Including 336.45 337.80 12.47 1.35 And 365.70 457.00 0.90 91.30 Including 397.00 417.00 1.46 20.00 730-007 0.00 55.30 1.95 55.30 Including 18.00 21.00 5.30 3.00 Including 43.00 48.00 5.81 5.00 730-010 13.70 159.40 4.70 145.70 Including 13.70 32.70 13.14 19.00 Including 117.45 159.40 9.32 41.95 730-011 9.20 60.00 4.90 50.80 Including 37.00 46.00 21.63 9.00 And 71.00 126.00 10.19 55.00 Including 88.50 109.00 18.95 20.50 Including 113.00 123.40 9.58 10.40 730-012 13.20 122.00 7.75 108.80 Including 16.20 24.00 32.22 7.80 Including 32.50 43.30 12.48 10.80 Including 61.30 65.30 14.44 4.00 Including 111.40 120.40 19.40 9.00 730-013 5.30 118.00 7.01 112.70 Including 30.50 33.50 18.68 3.00 Including 88.30 105.00 34.40 16.70 Including 92.00 95.00 186.47 3.00 730-014 15.00 55.50 3.62 40.50 Including 47.50 55.50 5.60 8.00 730-024 0.60 6.90 7.24 6.30 730-025 1.00 13.80 1.72 12.80 730-026 0.00 2.60 3.69 2.60 And 9.00 12.00 2.74 3.00 730-028 0.00 8.70 3.14 8.70 730-029 1.00 24.90 2.53 23.90 Including 10.00 11.90 5.25 1.90 And 30.20 32.80 4.49 2.60 730-030 0.00 120.55 2.30 120.55 Including 17.00 48.00 4.46 31.00 Including 75.45 80.70 4.07 5.25 Including 117.00 120.55 6.85 3.55 TC-09-69k 718.90 727.80 6.72 8.90 Including 726.40 727.80 26.82 1.40 TC-08-54a 627.20 631.40 2.07 4.20 And 640.50 672.00 1.56 31.50 Including 656.80 664.40 2.51 7.60 And 677.00 678.60 3.06 1.60 TC-08-54b 619.50 627.50 7.75 8.00 Including 620.00 621.00 20.80 1.00 TC-08-54d 600.00 601.30 8.73 1.30 And 622.60 652.20 4.17 29.60 Including 622.60 631.00 5.74 8.40 Including 640.10 652.20 5.43 12.80 TC-10-85a 739.40 741.50 8.07 2.10 TC11-111a 782.50 784.50 9.10 2.00 TC11-111b 726.50 731.50 11.49 5.00 TC11-112 668.80 738.70 5.65 69.90 Including 668.80 672.50 8.70 3.70 Including 677.90 682.80 8.84 4.90 Including 715.10 736.70 10.45 21.60 Including 715.10 719.70 16.21 4.60 Including 723.40 727.40 23.71 4.00 Notes Assays are reported uncut; true widths are not reported at this time. 650-007: abandoned at 457 metres before crossing entire porphyry. 710-002: lower-grade results at eastern extremity. TC-08-85, -85b, -85c and TC-08-54c: mainly low grade. TC-11-101, TC11-111: mainly low grade. Drill holes with alpha numeric designation represent branch holes off a pilot hole.
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