Below is a great link showing indepth detail about some of the best IOCGU's in australia, below this link is the initial drilling report from november 3th 2010, i can see from the Burey driling report some very distinct paralells between Balatindi and some of the best IOCGU's.
Burey?s first three drill holes on the Balatindi licence (BLDD 001, 002, 003) are located within the 600ppb gold-in-soil anomaly. All holes are HQ core holes, inclined at an angle of 10? off vertical on an azimuth of 180? (true). The planned target depths were a nominal 150m (BLDD001, 002) and 200m (BLDD003), part of a pattern designed to confirm the geometry and tenor of a gold enriched cap to an otherwise polymetallic mineralized setting, which Burey has conjectured to be evident from the recovered portions of the historic Mining Italiana drill results. Each run of drill core recovered by Burey has been oriented using a Reflex ActII RD orientation tool.
Geological Setting
The drill area is obviously an area of active erosion with the surface variously scattered with outcrop and float and saprock seen to extend for less than 4m below surface in the Burey drill holes. The initial impression of the host geological setting is that of a largely coherent ?potassic brown-red? coloured rhyodacitic lava and/or subvolcanic, predominantly medium, but varying to coarser and finer grained. Very occasional, thin (<1m), cross-cutting [at a high angle to the core axis] fine to medium grained granophyres, carrying an associated weak radiometric kick, are evident throughout. Very fine grained mafic (largely chloritized?) inclusions and/or very occasional thin mafic litho-units have also been logged.
Alteration
Alteration appears intense and polyphase. Pervasive expressions of potassic and silicic alteration are dominant throughout with the hard amorphous nature of the latter initially rendering drilling quite slow. Zones of strong chloritization, overprints of clay and banded to disseminated sulphidic (<2%) alteration are also preliminary interpretations. Interestingly, magnetite coexists and encloses much of the copper sulphide (chalcopyrite?) mineralisation. It is conjectured, assuming the Mining Italiana data to be a valid guide, that the more sulphidic zones are gold enriched., As such zones of sulphidic dissemination continued to be intersected in strength to depth, Burey?s drilling was continued until such mineralisation and alteration appeared to weaken whereupon each of the first two holes was terminated shortly thereafter. The third hole ran out of rods before mineralisation weakened. Two pervasive fabrics are dominant in the core; one is interpreted to be a primary feature (perhaps compressional layering?) the second fabric contains the chloritised, clay and sulphidic alteration. These two fabrics are somewhat orthogonal to each other in the top of the hole with the chlorite-clay-sulphide alteration appearing fairly flat and the ?primary? fabric fairly steep. Gradually they appear to converge down hole, the ?primary? fabric remaining steep, with both cut at an acute angle by the core low in the hole.
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