BCGold Corp. Discovers Evidence for Large Copper Porphyry-Type Mineralized System at Pucacorral - Seite 2

Pucacorral Phase I Exploration Program

BCGold's 2-month, Phase I Pucacorral field program has greatly exceeded Company expectations, defining what appears to be a large, porphyry system without any drilling. Exploration work included detailed mapping of tabular or elongated (vein-like) breccia bodies and selective sampling of a number of old mine workings, existing ore piles and waste rock dumps. The results of the sampling program (92 rock samples and 18 QA/QC samples) are expected within the next three to four weeks.

Porphyry Copper-Style Mineralization and Intrusive Centre Confirmed

The intrusive porphyry believed to have given rise to widespread alteration and mineralization at Pucacorral infiltrates the project area and hosts disseminated and stockwork porphyry-style mineralization. The true dimensions and shape of the porphyry are currently unknown and it is possible it may occur as apophyses or part of a much larger mineralized system nearby or at depth.

The porphyry source/host (quartz monzonite to granodiorite) was recognised in several mine adits by BCGold's geologists, most especially in those driven into the Lourdes and Sairita veins. Widespread porphyry-style hydrothermal alteration was identified in underground workings and on surface, indicating relatively close proximity to a porphyry centre.

Both porphyry and strongly silicified and locally hornfelsed mafic host rocks contain disseminated sulphides throughout variable intervals adjacent to veins and breccias. The disseminated sulphides comprise between 1% and 5% of the rock. Sulphide bearing veinlets also occur in intense stockwork zones throughout the mafic host rocks. The porphyry hosting the Lourdes vein is highly altered and brecciated where adjacent to vein, and contains sphalerite, galena, chalcopyrite, and pyrite.

Additional Underground Evidence for a Significant Mineralized Porphyry System at Pucacorral

1. A porphyritic rock type with disseminations of pyrite and minor chalcopyrite and stockwork veinlets of quartz-chalcopyrite in a quartz-sericite-pyrite matrix (Phyllic Alteration) has been identified adjacent to the Lourdes Vein along drift ribs of the two lowest levels. This has also been observed in the lower level at Sairita.

2. Multiple episodes of magmatic-hydrothermal brecciation are present in the underground workings. Thus far up to 10 different breccia types have been identified in the Property; these include eight in the Lourdes Vein and two in Sairita. These are generally found in the upper sections of copper porphyries.

3. Multiple phase intrusions of diorite to granodiorite composition are present at Pucacorral. Some breccias have sub-angular to sub-rounded broken rock fragments of granodiorite which contain disseminations and clusters of chalcopyrite. This may indicate a mineralized porphyry at depth and/or in the vicinity.

4. Several phases of stockwork type quartz veinlets, of variable orientation, are present in the porphyritic andesite host rocks. Some are coated fracture surfaces impregnated with chalcopyrite and/or pyrite. Other veinlets contain quartz with chalcopyrite; others are barren, while others contain only quartz pyrite.

5. The wall rocks near the mineralized fault breccias are strongly silicified, and within the stockwork areas contain sericite and pyrite (phyllic alteration found in porphyries).

There are at least two stages of mineralization after the emplacement of the copper porphyry type mineralization at Pucacorral. The first is the formation of quartz Zn-Pb-Cu-Ag veins along NE-SW faults and the second is the development of base metal quartz-calcite breccias along the earlier quartz veins. The early stage veins contain inclusions of sphalerite, chalcopyrite and argentiferous galena, and the second stage veins comprise base metal mineralization in a breccia of quartz and porphyry rock fragments.