La Pantera Concession (Title 0-561) covers an area of 1,734.10 hectares located at about 10 km south of the small, (population: 18,000) town of San Martin De Loba. San Martin is, across of the Magdalena River, close to the town of El Banco (population: 55,000). It is of easy access by roads all year round. Manpower and all infrastructural facilities are of no problem. Origin owns a 50% participation of the property and has control of management. It can acquire the other 50% at any time, pursuant to a successful negotiation.
La Pantera gold district is very active with hundreds of artisan miners operating within the granodiorite host rock. Production rates are only a few tons per day at best but production is widespread and continuous and miners are constantly developing new pits and tunnels indicating that gold is being extracted in sufficient quantity to justify the effort and investment. (Pierre O’Dowd, NI 43-101 report, July 5, 2018, page 7).
According to Pierre O’Dowd, the main targets at La Pantera are:
I – To investigate the mining potential of the saprolite for large scale open pit operations.
II – To explore the potential stock work mineralization under the saprolite open pit operations (one of them being from 400m to 800m in width and 3.4Km in length.
III – To explore the known high grade gold bearing vein type mineralization (Minas Bulla, Torrecillas, Los Matos and others).
Mining Potential of the shallow saprolite
There is intensive and extensive surface exploitation, for gold content, of the saprolite at La Pantera. Artisanal miners lease the services of a mechanical shovel to dig about 1.0 meter on the saprolite and make a small mound of the material. They then wash the material on a sluice box and recover some free gold. Two samples taken by Origin in June 2018 gave respectively 0.336 g/t Au in the Los Matos mine area and 1.282 g/t Au at Mina Bulla, (M01 M02 location the 2018 map). (Information: P. O’Dowd 43-101 report, July 2018 page 45).
Also, one sample taken by O’Dowd in July 2018 gave 1.0 g/t Au in the saprolite before treatment at Mina Bulla. Another sample taken at the Los Matos gave 0.534 g/t Au.
“The explanation for the presence of area with low gold grade in saprolite is not straight forward. Some areas of saprolite open pit mining are spatially adjacent to known gold bearing veins (Los Matos, Mina Bulla) while others are not. It can be interpreted that the saprolite probably locally hosts a network of small mineralized gold bearing quartz veinlets since no major veins or strong oxide staining are being apparently observed when digging the saprolite. Nothing is known about the fresh bedrock under these pits. It would therefore be educational to carry out some drilling under the areas of saprolite exploitation”. (O’Dowd, July 2018).
The mineralized saprolite represents a challenge in terms of volume. On a Pandora map dated 2012, the surface mining activities cover an areas whose tonnage, once cumulated, is at 4.3 Million tonnes per vertical meter. A recent map obtained in July 2018 shows a total volume of more than 8.0 Million tonnes per vertical meter and growing. How much of it is of economic value? This is what has to be determinated.
Potential for economical stockwork gold mineralization
As reported by O’Dowd in section 1.1 of his 43-101 report, it would be educational to find the source of the gold mineralization under the areas of saprolite exploitation. This could be easily investigated by drilling since the saprolite cover is not that thick. Quite a potential! The N-S long artisanal exploitation zone on the 2018 map is from 400 to 800m in width by 3.8Km in length. There is a tremendous mining potential in that zone alone.
High Grade gold bearing veins
Those are usually narrow (less than 1.0m) high grade (15 g/t Au to more than 100 g/t Au) gold bearing quartz veins mined by rudimental underground methods. There are several active and inactive small mines within the La Pantera property. Sometimes you do have presence of a wide (1.5 to 4.0m) shear zone showing the main vein and a stockwork of thinner gold bearing veinlets. Their exploration could lead to the discovery of an economical gold deposit.