Andina Copper Corporation (TSX-V: ANDC | FSE: FIR | OTCQB: PMMCF) has reported an outstanding drill intercept from hole CDH005 at its Cobrasco Project in Choco, Colombia. The hole was designed to test southern extensions of the Cobrasco system to a depth of 700m, in a large step-out over an area with limited geological data and no prior drilling. Results confirm a large-scale southerly extension of Cu-Mo-Ag mineralization, demonstrating a multi-phase porphyry system with consistently mineralized intermediate intrusive phases over broad intervals.
The company has completed step-out drillholes CDH006 and CDH007 with assays pending, and a new drillhole CDH008 is underway targeting the northern extension. Systematic drilling is ongoing, with Cu-Mo mineralization defined over a mostly near-surface zone within a 2500m x 1000m target area. Drilling to date has tested an area of approximately 1000m x 750m, less than half the potential footprint.
President and CEO Joseph van den Elsen commented: "Ongoing drilling at Cobrasco continues to demonstrate the large-scale and relatively shallow nature of Cobrasco Central, with results from hole CDH005 significantly extending the mineralized envelope to the south. With broad spaced holes having tested less than half the target area to-date, we see the potential for a globally significant copper deposit(s) at Cobrasco. To accelerate exploration and evaluation, a second drill will be mobilized to systematically explore and define the lateral extents of the Cu-Mo system and to add volume to the higher-grade copper shells intersected in drilling to date."
Hole CDH005 was collared from the same platform as holes CDH002, CDH003, and CDH004, oriented due south at a dip of -50°. It tested approximately 600m of lateral extent and 700m of vertical extent, terminating at 934m downhole. Unlike earlier holes that intersected felsic lithologies, CDH005 is characterized by mineralized diorite to dacite-andesite porphyries, generally manifesting as magnetic intrusive sequences transitioning to a magnetic low at depth. The intermediate units are intruded by narrow quartz-rich felsic rhyolite subvolcanic intrusions.
The hole collared within dark-colored diorite porphyry units to approximately 170m, then intersected fine-grained dacite–andesite units with visually significant chalcopyrite-dominant sulphide mineralization and weak to moderate sericite alteration. These units extend to about 630m, where a younger intermineral rhyolite porphyry continues to end of hole at 934m. The lower sections display epidote–chlorite alteration consistent with a propylitic assemblage, interpreted as outer or lower zones of the hydrothermal system. The mineralization remains open to the south.
Drillhole CDH005 differs from previous south-west trending holes as no phreatomagmatic breccias were observed at depth. These breccias have defined the SW limits to the Cobrasco Central mineralization system. The continuity of intrusive phases, alteration styles, and sulphide mineralization is supported by wide intercepts of moderate to high grade copper mineralization associated with the waning stages of potassic alteration transitioning into early sericitic alteration.
The large, coincident copper-molybdenum surface geochemical anomaly being tested extends approximately 2.5 km north–south and 900 m east–west. A systematic environmental baseline program has commenced, and the company's corporate presentation is available at Andina Copper Corporate Presentation. Interested parties can subscribe to the mailing list and follow social media channels: Mailing List, Andina Copper LinkedIn.
Francisco Montes, a consultant and qualified person under NI 43-101, has verified the scientific and technical information. Drilling procedures followed standard QAQC protocols, with core samples sent to ALS laboratories for analysis.
