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

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

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PT GMT Indonesia<br />

<strong>Mewet</strong> <strong>Vein</strong> : <strong>Jelai</strong> <strong>Gold</strong> <strong>Project</strong><br />

(<strong>Mewet</strong> Creek) <strong>and</strong> <strong>the</strong> collar heights on most <strong>of</strong> <strong>the</strong> drill holes were within a few metres <strong>of</strong> each<br />

o<strong>the</strong>r in vertical collar position.<br />

There is a fur<strong>the</strong>r requirement to accurately measure <strong>the</strong> topography in <strong>the</strong> <strong>Mewet</strong> vein area<br />

<strong>and</strong> <strong>the</strong> previously established benchmarks could be utilised for this purpose.<br />

11.4.2<br />

Base <strong>of</strong> Wea<strong>the</strong>ring<br />

The base <strong>of</strong> wea<strong>the</strong>ring can be established from <strong>the</strong> oxidation data from <strong>the</strong> drill holes in <strong>the</strong><br />

area. The nature <strong>of</strong> <strong>the</strong> <strong>mineralisation</strong> does not appear to be affected by <strong>the</strong> base <strong>of</strong> oxidation,<br />

with high grade areas close to <strong>the</strong> surface on <strong>the</strong> south end <strong>of</strong> <strong>the</strong> vein structure, similar in<br />

magnitude to <strong>the</strong> higher grade intercepts on <strong>the</strong> north end <strong>of</strong> <strong>the</strong> area reviewed at depth, below<br />

<strong>the</strong> surface <strong>of</strong> oxidation.<br />

11.4.3<br />

Hangingwall <strong>and</strong> Footwall<br />

The hangingwall <strong>and</strong> footwall <strong>of</strong> <strong>the</strong> <strong>Mewet</strong> <strong>Vein</strong> was modelled on a section by section basis<br />

using <strong>the</strong> geological logging as a guide to <strong>the</strong> mineralised envelope defined. It was found that<br />

<strong>the</strong> mineralised segments anastomose within <strong>the</strong> logged vein structure, occurring near <strong>the</strong><br />

hangingwall <strong>of</strong> <strong>the</strong> vein in some areas or near <strong>the</strong> footwall in o<strong>the</strong>rs. Occasionally,<br />

<strong>mineralisation</strong> can occur both in <strong>the</strong> footwall <strong>and</strong> <strong>the</strong> hangingwall, separated by several metres<br />

<strong>of</strong> interburden. In areas, <strong>the</strong> mineralised intercepts, defined at <strong>the</strong> 0.50 g/t Au composite<br />

boundary, <strong>the</strong> two coalesce to form a single mineralised vein.<br />

A number <strong>of</strong> small mineralised sections can be found in <strong>the</strong> hangingwall <strong>of</strong> <strong>the</strong> <strong>Mewet</strong> Lode but<br />

<strong>the</strong> geological correlations were not possible at this time. It is considered that closer spaced<br />

drilling will define <strong>the</strong>se hangingwall lodes more clearly <strong>and</strong> could be included in future models.<br />

Mineralised sections in <strong>the</strong> footwall <strong>of</strong> <strong>the</strong> main lode are rare <strong>and</strong>, in <strong>the</strong> few examples where<br />

<strong>the</strong>y occur, can be explained by reviewing <strong>the</strong> core logs. For example, in JM022, a series <strong>of</strong> low<br />

–grade mineralised intercepts in <strong>the</strong> footwall can be attributed to a single narrow (

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