Sandfire Resources Ltd. advised that recent underground drilling at its MATSA Copper Operations in south-western Spain has delineated a new zone of volcanic massive sulphide (VMS) copper-zinc-silver mineralisation adjacent to the Aguas Teñidas Mine. The newly identified San Pedro Zone is strategically located less than 100m from, and is likely connected, to the Aguas Teñidas Deposit. The mineralisation is defined by a series of highly encouraging VMS, copper-zinc-silver assay results which have been received from recent and ongoing drilling, with significant assays including: DAF-92: 6.9m @ 0.4% Cu, 3.8% Zn, 1.1% Pb and 33.9ppm Ag from 90.2m; DAF-93: 7.7m @ 0.5%Cu, 4.1% Zn, 1.2% Pb and 46.9ppm Ag from 90.2m; DAF-98: 4.2m @ 0.6% Cu, 7.2% Zn, 5.5% Pb and 95.7ppm Ag from 87.4m; DAF-109: 7.1m @ 1.8% Cu, 1.8% Zn, 0.5% Pb and 23.9ppm Ag from 33.4m; DAF-168: 15.9m @ 2.2% Cu, 1.7% Zn, 0.5% Pb and 27.4ppm Ag from 177.3m; & 8.4m @ 1.1% Cu, 4.0% Zn, 1.5% Pb and 53.6ppm Ag from 202.2m; DAF-151: 13.4m @ 1.5% Cu, 4.1% Zn, 2.2% Pb and 81.5ppm Ag from 126.6m. Drilling to date has confirmed that the newly delineated VMS mineralisation within the San Pedro Zone extends over a strike of at least 400m, with closer spaced drilling on a 20m x 20m pattern completed over a 300m strike extent. The mineralisation is located immediately south of the current Aguas Teñidas Mine and lies within a newly identified VMS mineralised horizon which the Sandfire exploration team identified as part of an ongoing structural geological review. The close proximity of the San Pedro Zone to existing underground mine infrastructure at Aguas Teñidas will allow for expeditious access and potential development, further elevating its importance as a near-mine exploration opportunity. The San Pedro Zone is interpreted to be hosted within the same geological horizon as the Aguas
Teñidas Mine, suggesting that it is likely part of the same deposit. The geological horizon consists of rhyodacite, tuffs and shales. The identification of the new zone represents one of the most significant initial outcomes of ongoing geological re-interpretation work being conducted by the Sandfire geology team. This re-interpretation work commenced in the December Quarter of FY2023 and aims to build a geologically sound common litho-structural framework integrating all current operations and exploration projects at MATSA. This work is continuing and has the potential to identify additional extensions and other discoveries along the prospective horizon along strike from the Aguas Teñidas Mine. The mineralisation at San Pedro has so far been defined over a strike length of 400m, with the potential to be extended further as it remains open to the west. The Zone can be described as zinc-dominated with drilling returning significant zinc, copper and silver assay results. The San Pedro Zone is interpreted as typical VMS mineralisation of the Iberian Pyrite Belt. Current activities include step-out drilling to test the strike extent of the San Pedro Zone, in
conjunction with down-hole electromagnetic (DHEM) surveys to help refine drill targeting and identify accumulations of massive sulphide mineralisation. Hole DAF-171 is currently being drilled to test 250m along-strike from the DAF-168 intersection. Based on its new geological understanding, Sandfire has outlined a 2km strike length of untested prospective horizon.