Dateline Returns Widespread REE Mineralisation at Music Valley

About this update from Dateline Resources Limited

Rock chip samples up to 7.1% TREO over wide area SAN BERNARDINO, CA / ACCESS Newswire / July 15, 2026 / Dateline Resources Limited (ASX:DTR)(OTCQB:DTREF)(FSE:YE1) (Dateline or the Company) is pleased to announce field mapping and sampling updates for the Music Valley Heavy Rare Earth Project ( Music Valley ), located in Riverside and San Bernardino Counties, California, USA. The Company's HREE and structural consultants, Tony Mariano Jr and Russell Mason, identified outcropping zones of the targeted Pinto Gneiss unit in all three of the target areas, correlating with the Thorium anomaly identified in the geophysical surveys. Importantly, all 33 samples returned anomalous rare earth results. In the Southern target area, the Pinto Gneiss outcrops and widespread samples returned assays of 7.13% TREO, 2.32% TREO and 1.07% TREO from samples 650-800 metres apart. In the NW target area, a cluster of samples over an approximate 200m strike length were highly anomalous in rare earths and associated minerals. Eleven samples were collected that ranged from 1.09% TREO in the northern end to 0.68% TREO. The Central target area returned a broad range of anomalous rare earth assays up to 0.66% TREO. All of the samples over a wide area were anomalous and require follow up. Dateline's Managing Director, Stephen Baghdadi, commented: "These results are a very encouraging first step in Dateline's exploration program at Music Valley. The sampling has confirmed the presence of rare earths at surface across the entire sampled areas, with the NW Target being the biggest and most consistent of the target zones. "The presence of Y-HREE responses is a lead indicator of heavy rare earths within the broader district. Our next task is to determine whether these signatures reflect zonation within a broader system or separate mineralizing events. Either outcome supports the need for systematic follow-up work across the project." Field Mapping and Sampling Program Dateline has completed initial mapping and sampling of the Music Valley HREE target areas, as defined by the recent high resolution magnetic and radiometric surveys. The Company's REE and structural specialists have visited all three of the priority targets, focusing on the areas mapped by the USGS as Pinto Gneiss and containing anomalous radiometric signatures. Figure 1: Music Valley Project sampling locations Rock Chip Assay Results The highest TREO[1] results from the current sampling program are shown below. TREO values are reported as oxide-equivalent ppm and percentage, calculated from the individual rare earth oxide assays. Magnet REO[2] refers to the percentage of the assay result that comes from rare earths used in permanent magnets.

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