Will they find Mother of all Mothers (Lode that is). or not? CLUFF RESOURCES PACIFIC NL 2002-05-30 ASX-SIGNAL-G
HOMEX - Sydney
+++++++++++++++++++++++++ Nineteen carats per tonne of uncut ruby (four grains per tonne), has been obtained from Trench 11 (Section G). The largest stone obtained was 2.11 carat, flawless and of good colour. 1,554 carats of uncut ruby were recovered from 81 tonnes of gravels treated. Of these, 26 carats were of size above 4.5 mm.
The sample processed comprised 81 tonnes of gravel. The gravel thickened into the terrace towards the end of the trench, and ranged from 0.5 metres at the start to 2.4 metres at the end of the sample. Overburden averaged 1.5 metres. The trench was about three metres wide. All tracers (imitation rubies) added to the stockpile of gravels were recovered from the sample, demonstrating that the plant was working efficiently.
This sample repeated five metres of the end of the recently dug Trench 11 (Section F), and continued for an additional eight metres, aiming to confirm the initial result and assess its continuity. This sample was testing an accidentally discovered raised terrace overlying basement rocks on the southern bank of the river flats. This Upper Terrace has resource potential additional to the river flats, which carry most of the inferred resource of 14 million carats (2.3 million tonnes at 6.3 carats per tonne).
Instead of barren rottengranite, the Upper Terrace has been confirmed to contain ruby bearing gravels. These older and high level gravels were deposited possibly millions of years before the recent alluvial gravels. This Upper Terrace, when tested previously, yielded lower grades than the recent alluvial gravels and was different in nature to the recent alluvials, containing boulders of rotten granite and basalt with a clayey matrix. This trench confirms that in some places it contains far higher quantities of ruby, as well as the heavy minerals spinel and ilmenite, with lower corundum values.
Rubies in these raised gravels appear to have originated from a different source from those in the adjacent recent alluvials, as they contain a higher proportion of higher quality Red and Pink 1 and 2 stones. The location of the source of this high quality ruby is still uncertain, but prospecting activities in the 1970s found rubies in swamps about two kilometres to the south ofthese gravels.
A ground magnetic survey to determine the location of areas of the Upper Terrace with high ilmenite content, and in turn possibly high ruby content, is planned as soon as equipment is available. The trench will be continued for approximately eighty metres, after which an additional six prospecting holes will be dug, sampling about twenty tonnes from each hole to determine the extent and grade of these Upper Terrace gravels.
CFR Price at posting:
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