Miner Lake Project, Ontario
The Miner Lake gold property is located approximately 45 km northeast of the Town of Beardmore and year-round access to the property can be gained by Trans-Canada Highway 11 and then by Secondary Provincial Highway 801. The property is owned 100% by Alto Ventures and consists of 25 claims covering 3,328 hectares. The southeast end of the Miner Lake property adjoins Alto's Greenoaks property.
Results from Alto's Exploration Programs
The Company completed a glacial till sampling program in 2015. Gold grains were recovered from 36 till samples and twenty one of these samples contain one or more grains described as" pristine". Pristine grains are delicate pieces of free gold that are generally interpreted to have been derived from sources close to the sampling sites. Five samples contain over 100 gold grains each including numerous pristine grains; one sample contains 578 gold grains of which 471 of the gold grains are described as pristine.
The surface exploration at Miner Lake identified widespread hydrothermal breccia zones that contain anomalous gold mineralization within an intermediate intrusive body. The size potential of the mineralized breccia zones is not yet known but the gold-bearing intrusion has surface dimensions of approximately 2.5 km by 1.5 km and there are still large areas of the intrusion that have not been prospected and sampled. Gold values up to 4.31 g/t gold were obtained in the breccia zones from the 2011 surface sampling. The breccia zones occur mainly as east striking bands up to tens of metres in width throughout the intrusion. The intrusion is also sheared and pervasive sulphide mineralization with anomalous gold and copper occurs associated with the sheared areas.
Diamond drilling in 2011 consisted of 1,732 m in nine holes testing some of the breccia zones that were located during the 2010 and 2011 surface programs. Significant gold anomalies were intersected in most of the drill holes including a wide zone in MIN11-06 which intersected 39.2 m averaging 0.6 g/t gold (see Table 1). The gold-bearing breccia zones that were tested are open along strike and to depth. There are also numerous other targets that require drilling.
Table 1 Gold Mineralized Sections from the 2011 Miner Lake Drill Program
Surface Channel Sample Highlights
Sample 099138 - 2796 ppb Au, 149 ppm Cu over 1.0 m (Broken Arrow)
Sample 099140 - 1055 ppb Au, 406 ppm Cu over 1.0 m (Broken Arrow)
Sample 099377 - 1809 ppb Au, 284 pm Cu over 1.0 m (Artois Trench)
Sample 099330 - 1285 ppb Au, 198 ppm Cu over 1.0 m (Roadside Trench)
Sample 099315 - 1153 ppb Au, 420 ppm Cu over 1.0 m (Roadside Trench)
Sample 099226 - 1259 ppb Au, 2020 ppm Cu over 1.0 m (Musketeer Trench)
Sample 099083 - 1550 ppb Au, 619 ppm Cu over 1.0 m (Trench 37)
Sample 098807 - 1141 ppb Au, 202 ppm Cu over 1.0 m (Trench 41)
Sample 099497 - 1140 ppb Au, 279 ppm Cu over 1.0 m (Trench 41)
Sample 099409 - 1977 ppb Au, 340 ppm Cu over 1.0 m (Trench 42)
Sample 099410 - 1025 ppb Au, 16415 ppm Cu over 1.0 m (Trench 42)
Results obtained in 2010 and 2009 include highly anomalous gold values, in both grab and channel samples. Results from Alto's 2009 surface saw-cut channel sampling of the shear hosted mineralization returned significant gold at the Whaleback Trench averaging 1.78 g/t gold and 0.11 % copper across 19 m and includes one section of 3.36 g/t gold and 0.24% copper across 5.0 m and another section of 6.29 g/t gold and 0.08% copper across 2.0m. These higher grade sections are contained within a wide sulphide-rich envelope that is almost 50 m wide.
The Miner Lake Property had been subject to sporadic exploration prior to work completed by Alto. One historical hole (CM08-04) was drilled 100 m west of Alto hole MIN11-04 and it intersected 36.7 m averaging 0.25 g/t gold further confirming the widespread gold system.
Geology and Mineralization
The Miner Lake gold property lies in the Onaman-Toshota Domain, just north of the Beardmore-Geraldton greenstone belt. A diorite plug intrudes a sequence of felsic to mafic fragmental volcanic rocks near the centre of the property. Regional shear zones, trending northeast and east cut the property near the areas of mineralization and strong biotite-silica alteration is associated with major shear zones traversing the intrusive plug.
Numerous zones of hydrothermal breccia occur within the diorite plug and the areas of breccia in diorite are chlorite altered and carry gold (0.6 g/t Au / 39.2 m). Locally, extensive sulphide mineralization including pyrrhotite, pyrite and chalcopyrite occurs associated with the breccia zones, particularly where the northeast trending shear zones cut the diorite. Some of these sulphide areas are up to 60 m wide.