Foto 1
Potassic alteration
Channelways of k-feldspar-silica is overprinted to background of secondary biotite-magnetite assemblage in andesite. Thin A-qz veins cut all association outlined above.
Foto 2
Potassic imprint
Early biotite vein characterized by mosaic-shaped fine-grained biotite crystals intergrown with chalcopyrite cutting to channelways of albite-silica-k-feldspar association on andesite unit previously biotitized.
Photo 3
Wall-rock with early alteration events
Andesite unit affected by three early sub-events: 1) relict of pervasive magnetite-secondary biotite (dark colour); 2) fine-grained k-feldspar-qz intergrowth introduced via channelways within a essentially ductile environment (white and pink colours); 3) All subevent outlined above are superimposed by A-type veinlets array.
Photo 4
Main intermineral porphyry
Multi-directional array of A-qz veinning in cuarse-grained qz-monzodiorite porphyry. This unit was uplifted, eroded and subsequently leached and all the boxworks are characterized by reddish-purple hematite (chalcocite)
Foto 5
A-qz type vein
Traslucent gray quartz veins hosting high concentration of disseminated chalcopyrite. These veins are associated to qz-diorite main intermineral porphyry.
Foto 6
Green gray sericite vein
fengite-muscovite assemblage intergrown with finely disseminated chalcopyrite. This vein appears re-used by a late-massive chalcopyrite vein
Foto 7
Late intermineral porphyry with moderate-strong sericite
Qz-monzonite porphyry affected by moderate to strong sericite imprint. Note the anfibol crystals appear completely bleached (decolored) by the hydrolisis. Meanwhile the feldspars seem partially or totally destroyed replaced by sericite. Copper and molybdenite mineralization are related to late-events
Foto 8
Reused D-vein
Sericite halo (gray colour) intergrown with small and scarce pyrite, reused by late-E-vein characterized by thin illite halo (white colour) while the suture is filled with massive pyrite.
Foto 9
Very late intermineral porphyry
Monzodiorite porphyry altered to a chlorite-silica association overimposed by illite-Py±Cpy assemblage produced by means weaked hydrothermal fluid.
Foto 10
Late hydrothermal breccia
Monzodiorite porphyry partly affected by at least fout events: early albite-silica assemblage (white color); moderate to discrete sericitic imprint (gray color); subsequently the rock it was brecciated and filled by anhydrite and finally massive chalcopyrite.
Foto 11
Late Moly in andesite
Andesite wallrock subjected to albite and minor-k-feldspar alteration subsequently partially affected to green-gray sericite-Cpy (green-gray colour) and finally late-molybdenite and at once chalcopyrite was precipitated.
Foto 12
Very late-hydrothermal breccia
Poorly sorted, subangular to angular shaped-forms, clast-supported hydrothermal breccia. Fragments of Late-intermineral porphyries, tourmaline breccia and andesite included in a rock-fluor matrix mixed with ankerite and coarse-grained chalcopyrite crystals. All the fragments are observed affected by different intensities of sericite-illite while tourmaline alteration can be or not present.
