Prospecting for Gold in Low Sulphidation veins and breccias.
Early stage prospect which is not yet available for JV
The Katrina Property is located in the Deseado Massif of Santa Cruz Province, approximately 70 Km East of the Cerro Vanguardia gold mine and 60 Km SW of the Cerro Moro Silver Mine. This property can be reached in about 60 minutes on approximately 55 km of largely unpaved road from the Tres Cerros Hotel to the NW of the project.
Magna Terra Minerals
Magna Terra Minerals has 100% control of the Katrina Cateo which constitutes 10,000 Hectares of exploration rights, much of which is covered in post mineral stratigraphy but with small erosional windows into the prospective Jurassic stratigraphy.
Geology: The stratigraphy of seen on the Katrina Cateo is as follows:
i) Tertiary or younger – rounded float (“rodados patagonigicos”)
ii) Cretaceous – volcanic ash deposits
iii) Cretaceous – Marine sediments with pectin and bivalves
iv) Jurassic – Course red sandstone and conglomerate
v) Jurassic – Andesitic volcanics
Units (i – iii) are post mineral. The red sandstones of unit iv tend to be preserved in areas where the underlying units are silicified or have veins. The Jurassic Andesitic volcanics outcrop sparsely but have produced some significant gold, silver anomalies.
There are three areas in which sampling has been undertaken:
The North West Area is characterized by pyroclastic rhyolite with opaline space filling silica. There were 13 samples taken in this area, not all of which are within the Cateo and none of which reported precious metals or significant trace elements. We note however that the NW striking structures are on strike for similar structures in Area 3, to which it may be structurally related.
The Eastern Area is characterized by silicification and veining in multiple parallel rhyolitic ribs, all of which are at a high angle with dips between 80 East and 80 degrees West. The area is also characterized by zones of argillic alteration. Of the 8 samples taken in this area only four have Au above detection and these samples range from 10 to 28 ppb with the latter also reporting 1ppm Ag. This area of minor precious metal anomalies is however accompanied by an average As grade of 231 ppm. We interpret this area to represent the top of a horst controlled hydrothermal system.
The Central Area constitutes a 2.5 km North-South and 2 km East-West corridor with evidence of a range of alteration and mineralization with variable structural and stratigraphic control. Of the 15 samples taken in this area, 7 were below detection in Au and 11 below detection in Ag, however the average Au is 0.276 ppm with an average Ag of 1.5 ppm. This is accompanied by average As and Pb of 79 ppm and 22 ppm respectively.
Whilst work is at a very early stage we note that initial prospecting at Katrina provided significant evidence of hydrothermal activity and mineralization. We are currently planning further campaigns in the area to advance prospection and mapping and to define the mineralized footprint.