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

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Mewet Vein : Jelai Gold Project
9
9.1
DRILLING PROGRAMME
Available Data
9.1.1
Drill Hole Logs
The drill hole logs were coded and validated to remove inconsistent lithological abbreviations to
endure the database was consistent for plotting. The present lithology abbreviations used by
JCM are very similar to the old lithology coding used by Ivanhoe, therefore, the correlation was
made easily and no major coding discrepancies were noted.
The lithology logs were imported into an Access database for archiving and analysis.
9.1.2
Core Photographs
All core photographs have been collected from both phases of drilling and the JCM core
photography is complete and archived in a digital format. The old Ivanhoe core photography is
available as scanned digital photos and original 35mm film-based photographs with negatives.
9.1.3 Drill Hole Data
The current database for the Jelai Gold Project contains 115 drill holes in different areas of the
vein system. From these holes, 26 drill holes for an advance of 3,901.52 metres (JM001 to
JM026) with a further 89 drill holes, prefixed JCM###, completed in the second phase of drilling
by JCM for an advance of 8,273.03 metres. The drilling in the Mewet Vein was all oriented to
the east, with the original drilling on 50 metre sections. Hole inclinations ranged between 55-70°
but were mostly inclined at 60°.
Of these, the drill holes considered in the data assessment are outlined in Table 3 and 4.
Hole Easting (m) Northing (m) Elev. (m) Depth (m) Azimuth Inclin
JM011 497961.0 356449.0 56.0 186.00 090 -55
JM012 497931.0 356449.0 59.0 115.70 090 -60
JM013 497972.0 356386.0 59.0 117.00 093 -60
JM014 497956.0 356495.0 56.0 77.50 093 -60
JM015 497927.0 356333.0 55.0 102.00 090 -60
JM016 497927.0 356391.0 56.0 93.60 090 -60
JM017 497915.0 356496.0 55.0 102.00 090 -60
JM018 497879.0 356457.0 56.0 209.95 090 -60
JM019 497829.0 356457.0 56.0 224.00 090 -60
JM020 497801.0 356457.0 56.0 255.00 090 -62
JM021 497902.0 356347.0 55.0 153.00 090 -70
JM022 497888.0 356391.0 56.0 190.05 090 -65
Total (m) 1,825.80
Table 3. Drill holes included in the assessment from the JM series of diamond drill holes (Ivanhoe
drilling).
The early drill holes by Ivanhoe were generally surveyed down hole using a Eastman Single
Shot down hole camera. The original discs are still available from this programme and are
archived in Jakarta. The second round of drill holes were not surveyed down hole, as most of
the drill holes were short (approximately 70 metres for scout holes). However, the deeper drilling
on the Mewet Vein, particularly for smaller diameter drilling, it would be expected that the drift of
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