The 2,583.2 hectare Azulcocha West property is located immediately west of the Azulcocha mine concessions. The property was staked by Forrester in 2006 to cover 30 known polymetallic showings including skarn, manto and vein deposits in the area. In 2007, Forrester signed an option/ joint venture agreement with Empresa Los Quenales (Glencore) to explore the property. The program consisted of detailed mapping, geophysics, trenching, rock sampling and diamond drilling.
Both the Jurassic limestones of the hanging wall and the Cretaceous sandstones of the footwall of the Conchas – Gran Bretana Fault have been intruded by Neogene Granodioritic calc-alkaline laccoliths. The largest of these is the granodioritic Chuquipite intrusive that is approximately 4 km in diameter and is in contact with the Condorsinga limestone. The smaller San Pablo Intrusive, classified as dacite porphyry, is approximately 700 metres x 200 metres in size and intrudes the northern limb of the limestone. The two intrusive bodies are approximately 1.5 kilometres from each other.
The juxtaposition of the two metal rich intrusions with reactive limestone wall rocks in the presence of the western extension of the Conchas – Gran Bretana Fault (a major regional ore host) has been responsible for the proliferation of mineralization. Drilling indicates that the two most important structures are the 2.5 kilometre long northern contact of the Chuquipite intrusive (Maria Fe and Valeria skarn/replacement showings) and the approximately 500 metre long Recuperada vein. There is a marked contrast between the mineralogy of the two structures: the Maria Fe is zinc rich metasomatic with abundant skarn minerals in the gangue; whereas the Recuperada is silver rich with a silica gangue that appears to be epithermal. There is also a contrast in depth of oxidation with the Recuperada sulfides having been much less affected by supergene processes. Due to the differences in strike and dip of the two structures there is a convergence of the two mineralized systems near the eastern end of the Maria Fe showing.
The best intersection at Maria Fe is 23.9 metres of 12.2% zinc in the transition zone (mixed oxide/ sulphide) at a vertical depth of about 140 metres. The trenching/ drilling at the Recuperada structure indicates that there are two approximately 140 metre long zones of mineralized vein: the northeast zone - width 0.48 metres at 279.8 g/t Ag, 1.2% Pb, 0.79% Zn; and the southwest zone – width 1.40 metres at 73 g/t Ag, o.51% Pb, 0.76% Zn.