Andina Copper Corporation (TSX-V: ANDC | FSE: FIR | OTCQB: PMMCF) has reported a significant drill intercept from hole CDH005 at its Cobrasco Project in Choco, Colombia. The hole was designed to test the southern extensions of the Cobrasco system to a depth of 700 meters in a large step-out over an area with limited geological data and no prior drilling. The results confirm a large-scale southerly extension of copper-molybdenum-silver mineralization, demonstrating the potential for a globally significant copper deposit at Cobrasco.
CDH005 was collared from the same platform as holes CDH002, CDH003, and CDH004, oriented due south (Az: 180°, Dip: -50°). It tested approximately 600 meters of lateral extent and 700 meters of vertical extent, terminating at a downhole depth of 934 meters. The hole intersected mineralized diorite to dacite-andesite porphyries, differing from earlier holes that encountered quartz-rich rhyolitic to dacitic subvolcanic domes. The intermediate dacite-andesite units are intruded by narrow quartz-rich felsic rhyolite subvolcanic intrusions, interpreted to inter-finger with the earlier intermediate porphyry phase.
The mineralization at Cobrasco Central is characterized by a large multi-phase porphyry system, with broad intervals of consistent copper-molybdenum mineralization. Drilling to date has tested an area of approximately 1000 meters by 750 meters, less than half the potential footprint of a 2500-meter by 1000-meter target area. The company has completed step-out drillholes CDH006 and CDH007 (assays pending) and has commenced hole CDH008 targeting the northern extension of mineralization.
Andina Copper’s 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.”
The continuity of intrusive phases, alteration styles, and sulfide mineralization throughout CDH005 is supported by wide intercepts of moderate to high-grade copper mineralization, interpreted to be associated with the waning stages of potassic alteration transitioning into early sericitic alteration. The lower sections of the hole display epidote–chlorite alteration consistent with a propylitic assemblage, interpreted to represent the outer or lower zones of the hydrothermal system. The mineralization remains open to the south.
The large, strongly coincident copper-molybdenum surface geochemical anomaly currently being tested by drilling extends approximately 2.5 kilometers north–south and 900 meters east–west. A systematic environmental baseline program has commenced across the project area and will be followed by detailed geological mapping and further surface sampling to support ongoing drill targeting.
Details of the significant drill intercepts and drill collar parameters can be found in the company’s news release. Interested parties can access the company’s corporate presentation and subscribe to its mailing list for updates via the links provided.
