2000: Mineralization at the La Frontera property was initially discovered and staked by Mansfield’s exploration team in March 2000. There was no evidence of previous exploration in the area.
2005-2007: Under a 2005 joint venture agreement with Mansfield, Apex Silver Mines Ltd completed 1,960 m of trenches (Table 1), sampling, 17 km of electromagnetic geophysical survey in 9 lines, and built approximately 160 km of access road to the project. In 2006, a drilling program of 2,149 m in 12 drill holes was completed. This limited drilling encountered mineralization at depth (Table 2), but favorable structures and zones were not likely properly tested. There is potential for mineralized corridors with multiple orientations and strike-lengths in excess of 1 km. Apex dropped the property in 2007.
2008: The La Frontera property was transferred to Pachamama as part of a restructuring of Mansfield.
2012: The property was transferred to Regulus as part of the merger with Pachamama.
2018: The La Frontera project, together with Rio Grande, Aguas Calientes and other early stage Argentina projects, was spun out into Aldebaran.
|North Trench||6.2 m||0.60||2344.0||71.00|
|Trench II||38.0 m|
incl. 10.0 m
|Trench VIb||24.0 m||0.60||18.0||6.30|
|Trench V1a||6.0 m|
and 2.0 m
|Breccia Sur||14.0 m|
incl. 2.0 m
Table 1: Highlights of 2005 La Frontera Property Trenching Results
|Hole ||From (m)||To (m)||Width (m)||Au ppm||Ag ppm|
Table 2. Significant results from the 2006 drilling campaign