Orla’s Caballito Cu-Au zone is a new mineral discovery in a topographic low situated 1.5 kilometres SE from the Quemita deposit adjacent Idaida and 4.8 kilometres ESE from the La Pava deposit. Caballito is a high-grade, copper-dominant, high-sulfidation style epithermal system hosted in Upper Cretaceous submarine dacitic volcanic rocks and may have been localized along permeable beds of dacitic hyaloclastites. Mineralization consists predominately of shallow Cu-Au sulphide from depths of ~40-200 meters below unaltered dacite and a thin veneer of lateritic soils. It is a blind discovery in steep jungle terrain guided by IP-EM geophysics and scout drilling (discovery holes include CQDH17-089, 104 and 116). Average copper grades range from 0.5 to >1.8% with gold from 0.2 to 0.4 g/t.
The Cu-Au zone developed as a stratiform hydrothermal breccia within a zone of quartz-rich rocks defined by a central core of vuggy silica that is progressively enveloped by quartz – dickite alunite to quartz – kaolinite ± dickite (advanced argillic), illite – smectite – pyrite (intermediate argillic), chlorite – illite – smectite – calcite (propylitic) to unaltered dacitic volcanic rocks. The breccia features sulfides with high-sulfidation states (pyrite-enargite-covellite) together with sulfides of intermediate sulfidation states (bornite-chalcocite) and contains fragments of vuggy silica with euhedral pyrite – enargite ± chalcopyrite (high temperature, low pH) cemented with quartz, colloform-textured granular and spheroidal pyrite (low temperature, increased pH), bornite and chalcocite. Preliminary ore microscopy at Caballito indicates that bornite replaced chalcopyrite, chalcocite replaced bornite, and covellite replaced rims of chalcocite. Adjacent the stratiform breccia, at the Idaida prospect, the hydrothermal breccia plunges sub-vertical and may represent a feeder zone for Caballito. Hypogene covellite replaced enargite in the Idaida breccia enhancing copper grades and reducing arsenic concentrations. Numerous dikes of quartz diorite, diorite and basaltic-andesite, variable altered to illite – smectite, intruded both the Idaida and Caballito breccia.
Orla is exploring a 6 kilometre WNW-ESE trend for high-grade Cu-Au sulphide from the Quemita Au-deposit through Caballito to Pelona, as well as, potential zones for Cu-Au sulfide in a quartz diorite intrusion to the south at La Prieta. No reserve or mineral resources have been calculated as the zone is currently in exploration mode.