Previous work on the Lobo project has outlined 5 to 7 km of northeast-trending
epithermal vein/breccia trends. Mineralization along these trends occurs as both lowsulphidation
(gold) and high-sulphidation (copper-silver) ore shoots. Extensive areas of
silica cap have been mapped. These might represent the un-eroded tops of epithermal or
porphyry mineralization and have high potential for mineralization beneath.
The magnetic data is a useful mapping tool, outlining both lithological and structural
trends. A previous aeromagnetic survey (1996) outlined a cluster of seven anomalies at
Lobo which were interpreted as possible intrusives. The recent ground survey has
detailed the area, confirming the airborne results and detailing several magnetic bodies
that might be associated with buried porphyry systems. The overall fabric of the magnetic
responses reflect the easterly to northeasterly strike of the epithermal trends. In addition,
there are magnetic indications of a major, northerly trending structural break through the
centre of the property and several smaller, subparallel breaks.
The IP survey was configured to search for large, buried porphyry targets. Two large
anomalies consisting of a horizontal, near surface high resistivity layer (silica cap)
overlying high chargeability zones (disseminated sulphides) were mapped across multiple
survey lines and are considered high priority targets. Several isolated anomalies
exhibiting similar characteristics were also detected that warrant further investigation.
While the IP survey was not configured to map the epithermal, vein/breccia,
oreshoot targets, the response over these trends conforms to the geological models. The
IP data suggests these oreshoots occur within a steep, northwesterly dipping layer of low
resistivity and low chargeability material.