Polymetallic deposit of massive sulphide and disseminated sulphide
Aerial View - Arizaro Project Click to enlarge map
Arizaro Zone Gold-Copper Mineralized Zones
Click to enlarge map
Arizaro is a copper-gold porphyry system located 3 kilometres southeast of the Company's Lindero deposit and 12 kilometres southeast of the Company's Rio Grande project. Mineralization and alteration at Arizaro is similar to Rio Grande with gold and copper values occurring in association with disseminated and veinlet-controlled chalcopyrite and magnetite within a zone of potassically altered sub-volcanic rocks, over dimensions of 600 metres by 800 metres. Assays from 93 grab samples within the potassic zone at Arizaro ranged from 0.05% copper to 2.7% copper (average 0.49% copper). Gold values range from anomalous to 13 grams gold (average 1.09 grams gold). Subsequent to the initial prospecting at Arizaro, geological, soil geochemical and trenching surveys were executed. Selected results from channel sampling of machine-excavated trenches are as follows:
ARIZARO - TRENCH RESULTS
Interval
Metres
Gold (ppb)
Copper (%)
Trench 00
AZ00 1053 to 1068
32
1415
0.500
AZ00 1191 to 1193
6
600
0.292
AZ00 1248 to 1276
58
416
0.275
Includes AZ00-1262 to 1269
16
555
0.440
Trench 1
AZ1 1018 to 1049
64
861
0.310
Includes (1018 to 1027)
20
1596
0.350
Trench 100 South
AZ100S 1012 to 1021
20
1086
0.364
Includes 1015 to 1020
12
1413
0.485
AZ100S 1035 to 1056
44
312
0.313
Includes 1043 to 1052
20
402
0.397
AZ100S 1075 to 1076
4
3045
0.156
AZ100S 1097 to 1100
8
507
0.251
Trench 300W
AZ300W 1011 to 1031
42
689
0.512
Includes 1021 to 1030
20
942
0.526
The following table contains highlights from Rio Tinto's 2002 drilling at Arizaro.
