Post by
diabase1 on Sep 25, 2023 7:44am
Milligan 4
In 2009, Golden Chalice put down 2 drill holes (20000000182/20000948), GCAE09-5 and 6. "Gold mineralization was returned from the quartz zones in hole GCAE09-5 : 1.52 g/t Au over 0.5m (23.4-23.9 m downhole) and 1.95 g/t Au over 0.7m (91.9-92.6 m). Hole GCAE09-6 located 300 m southeast of GCAE09-05 returned 1.85 g/t Au over 0.8 m (236.7-237.5 m) from a sulphidic quartz flooded zone".
Unfortunately, two different people logged the drill core and as they say, not all geologists think the same. And I'm no geologist, so I have to interpret what they're saying, as best as I can. Anyway, I'll try to summarize what I observed in the logs.
Hole GCAE09-5
a) most of the hole was basalt, although peridotite was mentioned. The latter is probably another form of basalt.
b) there were a couple of bands of interflow sediments (cherty argillite, wacke and mudstone).
c) extremely narrow quartz veins (jasper) recorded the best gold grades, which makes exploration tough to find these horizons.
d) all of these rocks are non-magnetic.
e) there is very little or no sulphides within the hole, making it very difficult to detect with geophysics. A tightly spaced grid of geochemical surveying may be the only choice.
Hole GCAE09-6
a) the majority of this drill hole is basalt, with the second most abundant rock being feldspar porphyry.
b) there were no interflow sediments in this hole, suggesting that this drill hole was not drilling on the same geological horizon as Hole GCAE09-5.
c) the best gold intercept was again contained in a quartz vein (jasper). It seems therefore, that none of the rocks, neither basalt, feldspar porphyry, or the interflow sediments are playing host to any gold.
d) there was trace to nil sulphides in this drill hole.
e) the majority of these rocks are non-magnetic.
When all is said and done, how does one continue to explore for the type of gold structure that exists in this area. It will be difficult. Since these fissures, shears have been found to be so narrow so far, it will be prudent to be looking for wider, bulging areas along strike from the known gold intercepts. Perhaps cross-cutting faults would be one area to look for, where there may be a trap for gold to accumulate. Also, a re-processing of the magnetic data to produce a second vertical derivative map, which would highlight the areas of most intense magnetic lows more accurately (contacts). Concentrating on the region of magnetic low on the northern half of the property (Assessment File 20000005774/20008201), a tight grid of soil sampling could be carried out, with an analysis of Au, As, Hg, Sb and Ni.
The location of the Kerrs gold zone on the western contact (basalt/peridotite) of the high intensity magnetic trend (see McLaren Resources website), makes me wonder if a similar scenario could exist just off the west claim boundary of RT Minerals property, especially if there were any east-west cross-cutting structures from the Eastford Lake gold zone. It may be worth looking at.