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CLONCURRY NORTH PROJECT (100% CYU)
The Cloncurry North Project comprises three tenements (EPMs 12205, 15084 and 15095) (Figure 1) form part of CYU’s North West Queensland Properties are located in the highly prospective Proterozoic Mount Isa Inlier of northwest Queensland.
GEM
For Gem, results to date indicate a series of intrusive centres which are mineralised. These centres have in turn been overprinted by late copper quartz veins in the same style as historically exploited in the district.
Figure 1. For the Cloncurry prospect Gem was the primary target investigated in the January 2010 Quarter.
Table 1: GEM Prospect RC and DD Drill Collar Locations
NOTE: Datum GDA94 Zone 54, Azimuth is Grid North.
Results returned to data have supported the current geological model with the mineralisation zones occurring either side of a medium-grained granitic dyke (Fgm), a sub-vertical post-mineralisation dyke which follows the same structural paths of the mineralisation, and in places over prints it. Although this dyke seemingly stopes out mineralisation in parts, it will be used as a major indicator in locating mineralisation at Gem. A 3D model of the main mineralised zone and accompanying dykes has been created using Surpac software. The 3D model clearly shows the relationship between the mineralisation and the main dyke, and future work will continue to develop the relationship between the multiple dykes in the Gem Prospect and their importance in understanding the structure constraining mineralisation.
Some of the interesting results return to date include:
| GR-003 |
38m @ 1.25% copper and 0.20g/t gold from 33m |
| GR-015 |
6m @ 1.10% copper and 0.28g/t gold from 185m |
| GR-021 |
15m @ 0.68% copper and 0.08 g/t gold from 44m |
| GR024 |
12m @ 1.08% copper, 0.58g/t gold from 16m |
| GR025 |
2m @ 0.65% copper, 1.61g/t gold from 88m |
| GR029 |
12m @ 0.51% copper , 0.68g/t gold from 58m |
| GR030 |
9m @ 1.66% copper, 0.46g/t gold from 15m
4m @ 0.88% copper, 0.14g/t gold from 88m |
| GR033 |
5m @ 0.67% copper, 0.21g/t gold from 31m |
| GR042 |
22m @ 0.45% copper, 0.25g/t gold from 108m |
Of interest is the increasing of the gold grade from previous drillholes. A geostatistical analysis of all assays results has some a 0.97 correlation co-efficient between copper and gold.
Figure 2. Gem interpretive prospect scale map
Figure 3. GR-003 cross section - Gem Prospect
Figure 4. GR-021 cross section - Gem Prospect
Plate 1. Gem surface mineralisation. Importantly copper mineralisation is not immediately evident on surface as per the iron oxide stained quartz sulphide breccia to the left of the hammer. |