Los Cerros Limited (ASX: LCL) has used 3D geochemical modelling reveals that the Guayacanes and Corporacion porphyry targets at its Chuscal project in Colombia form part of a substantial porphyry target below and untested by recent drilling.
The company and its technical advisor Dr Steve Garwin recently engaged Fathom Geophysics to apply a sophisticated 3-D multi-element geochemical modelling technique to the Chuscal geochemical data set.
Los Cerros Managing Director, Jason Stirbinskis, saidDr Garwin has successfully used this technique previously to fine tune porphyry targets such as SolGold’s Tier One Alpala discovery in Ecuador.
The technique compares 11 selected porphyry pathfinder elements from Chuscal surface samples and drill core assays to the distribution of the same pathfinders at the Yerington porphyry – an internationally studied Cu-Mo-Au porphyry deposit in Nevada.
The Fathom simulation considers the element profile of a Chuscal data point and places that data point in the context of the vertical dispersion of the Yerington geochemical profile.
Mr Stirbinskis said the exercise generated a compelling ‘high quality target’, the ‘Fathom’ target, incorporating the previously identified Guayacanes and Corporacion porphyry targets, at a depth of approximately 500m, some 50-100m below the four holes drilled in the 2019 drilling program.
The Fathom target core lies midway between the Guayacanes and Corporacion targets and extending to the northeast of previous drilling.
Logged sericite and potassic alteration near the end of LCL drill holes support proximity to a porphyry.
Fathom’s work is based on the provision of raw geochemical data only,” Mr.Stirbinskis said.
“It is a credit to our technical team that the Fathom work supports the existing Corporacion and Guayacanes porphyry targets generated from the entire geological and geophysical database including porphyry alteration signatures, veining styles and magnetics and adds a third target of higher probability that lies between these two targets.
“Our Colombian geological team continues to tweak both epithermal and porphyry targets ahead of our planned resumption of drilling in H2 2020.”
