Pampa Metals Intersects Wide Interval of Copper Mineralization with Bornite Rich Core in Second Drillhole at Piuquenes, San Juan Province, Argentina

VANCOUVER, BC / ACCESSWIRE / March 26, 2024 / Pampa Metals Corp. ("Pampa Metals" or the "Company") (CSE:PM)(FSE:FIRA)(OTCQB:PMMCF) is pleased to report that diamond drillhole PIU-02 (refer figure 1) was completed to a downhole depth of 870m. The hole was orientated along an east-west section, proximate to historical drillholes P4 and P2 and designed to test the lateral extension of the mineralized body, primarily along the western edge of the Piuquenes Central porphyry.

Geology and Mineralization - Diamond Drillhole PIU-02

Moderate intensity porphyry A type quartz veinlets were intersected from 120 m downhole, with copper oxides evident between 218-232 m, partially coincident with a zone of moderate supergene copper enrichment from 226 to 380 m. Copper sulphide (chalcopyrite) mineralization is evident in quartz veining from 270 m.

Foto: Accesswire

Image 1: Porphyry A type quartz stockwork veining with potassic (K-Spar) altered vein halos, supergene Cu enrichment and Cu oxides overprinting potassic altered quartz-diorite porphyry (218m)

A significant increase in quartz veining is observed from 364m downhole, coincident with an increase in intermineral potassic alteration (Kfeldspar-quartz), higher magnetite content, lower presence of early biotite and the appearance of bornite and chalcopyrite mineralization. Bornite mineralization remains evident down to 610m, often more abundant than chalcopyrite, and coincident with an increased intensity of porphyry A type quartz veining and pulses of intermineral granodiorite porphyry. Bornite is disseminated in quartz veinlets, frequently intergrown with chalcopyrite. The bornite mineralized core remains open to depth.

Foto: Accesswire

Image 2: Intense porphyry A type quartz vein stockwork with disseminated chalcopyrite and bornite, overprinting early potassic altered diorite porphyry

From 610 m downhole the frequency of quartz veinlets, intermineral potassic alteration, magnetite content, and the presence of bornite decreases. Chalcopyrite-bornite mineralization remains present in the quartz veinlets, which frequently show thin Kfeldspar haloes. The outer periphery of the Piuquenes porphyry system can be observed from 690 m, with a predominance of early biotite over mafics along with disseminated magnetite, sporadic and thin quartz veinlets with a halo of potassium Kfeldspar and disseminated chalcopyrite and bornite overprinting diorite porphyry. From 690 m a late intermediate argillic event with chlorite is evident, along with veinlets and dissemination of pyrite/chalcopyrite-pyrite and specular magnetic hematite, grading to phyllic with selective chlorite-sericite and pervasive sericite veinlets, with fine dissemination of pyrite from 850 m to 870m (End of Hole).