Geology and mineralisation of the Mewet Vein, Jelai Gold Project ...

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PT GMT Indonesia Mewet Vein : Jelai Gold Project the drill holes would be significant over depths of 100 metres and future drilling will require the inclusion of down hole surveying to ensure the pierce points are accurately located within the vein structures. Hole Easting (m) Northing (m) Elev. (m) Depth (m) Azimuth Inclin JCM67 497885.0 356496.0 49.7 158.3 090 -60 JCM68 497957.0 356333.0 56.7 76.00 090 -60 JCM69 497957.0 356293.0 55.0 75.45 090 -60 JCM71 497952.1 356239.2 49.8 76.55 090 -60 JCM73 497847.0 356372.0 56.0 200.00 090 -60 JCM74 497915.0 356536.0 55.0 75.40 090 -60 JCM76 497959.1 356472.7 56.0 75.70 090 -60 JCM78 497972.0 356417.0 59.0 75.65 090 -60 JCM81 497980.0 356356.1 59.0 75.60 090 -60 JCM83 497978.6 356293.0 57.0 75.75 090 -60 Total (m) 964.40 Table 4. Drill holes included in the assessment from the JCM series of diamond drill holes (JCM drilling). The drill hole locations for the first round of drilling by Ivanhoe were surveyed by tape and compass from fixed benchmarks established by Differential GPS during the Ivanhoe exploration. Some of these benchmarks still exist in the project area. The second round of drilling, conducted by JCM, used tape and compass traverses in conjunction with hand-held GPS surveys. Neither method is sufficiently accurate for surveying drill hole collar locations, with the lack of precise positioning affecting the confidence of the geological model for the Mewet Vein area. The drill hole database was supplied to GMT in a number of formats and the entire dataset was migrated into a new Access database for convenience and correlation. The final database contained the following tables: • Collar : Easting, northing and elevation of the collar in WGS84 Zone 50North projection, drill hole depth, collar azimuth and inclination of the bore hole and comments, • Assay : Detailed intervals of sampling from the project, including sample number, from and to intervals, detailed analysis data including check samples and repeat samples and average gold (taken across the results of the primary and check samples), • Survey : Recording of all down hole survey data, using collar data at the end of hole if no down hole surveys were completed, • Lithology : Detailed core logging data such as lithology, alteration, oxidation and mineralisation. A typical cross section of the Mewet Vein drilling, with lithology and assays, is shown in Figure 6. 0065 JCM/GEO/2009.04 Page 28
PT GMT Indonesia Mewet Vein : Jelai Gold Project Figure 6. Cross section 356,450N showing the general lithology, according to Table 6 (below) and Au histograms, and the grade histograms for Au. Hole From To Intercept True Width Au Ag Reported by: (metres) (metres) (metres) (metres) (g/t) (g/t) JCM JCM-68 36.65 39.10 2.45 2.12 4.45 11 JCM and 59.70 60.15 0.45 0.39 2.83 33 JCM JCM-69 22.75 28.75 6.00 5.20 15.84 81 JCM and 52.00 54.85 2.85 2.47 2.09 7 JCM JCM-73 153.95 156.40 2.45 2.12 1.02 2 JCM JCM-74 60.25 63.45 3.20 2.77 0.94 1 JCM JCM-76 18.70 21.55 2.85 2.47 9.39 27 JCM JCM-78 23.50 26.20 2.70 2.34 5.02 18 JCM JCM-81 34.30 41.20 6.90 5.98 24.70 22 JCM and 12.50 13.60 1.10 0.95 2.20 2 JCM and 57.60 59.10 1.50 1.30 5.50 5 JCM JCM-83 2.45 7.05 4.60 3.98 8.41 52 JCM JM011 26.31 28.43 2.12 1.84 6.90 16 Ivanhoe Mines JM012 57.00 58.70 1.70 1.47 11.10 10 Ivanhoe Mines JM013 38.33 40.20 1.87 1.62 7.50 13 Ivanhoe Mines JM015 67.50 69.00 1.50 1.30 7.30 14 Ivanhoe Mines and 69.27 70.77 1.50 1.30 7.40 20 Ivanhoe Mines JM018 115.00 119.51 4.51 3.91 6.40 8 Ivanhoe Mines JM019 185.10 191.20 6.10 5.28 5.70 15 Ivanhoe Mines Table 5. Significant intercepts from the Mewet Vein drilling in the area assessed. 0065 JCM/GEO/2009.04 Page 29
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