Bayan Mining and Minerals Maiden Drill Program Confirms REE Mineralisation at Desert Star, California

Anjali Anand

10 November 2026 03:01 PM AEDT

Bayan Mining and Minerals Maiden Drill Program Confirms REE Mineralisation at Desert Star, California

Image Source: Krish Capital Pty Ltd

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Bayan Mining and Minerals (ASX:BMM) has reported assay results from its maiden reverse circulation drilling program at the 100% owned Desert Star Rare Earth Project in San Bernardino County, California, with five of six holes returning intercepts above 1,000 ppm total rare earth oxides (TREO).

Key Points

Six RC holes totalling 856 m were completed at four locations within the 6.29 km² Desert Star claim block
DS-001 returned 12.2 m at 2,263 ppm TREO from 16.8 m, including 3.0 m at 3,497 ppm TREO from 18.3 m
DS-002 returned three intercepts within a 41.1 m interval from 64.0 m depth, with the hole ending in mineralisation
Neodymium and praseodymium oxides (NdPr) account for 20% to 24% of TREO across all intercepts
Bayan has staked and filed an additional five claims proximal to known geochemical and geophysical REE anomalies

Maiden Drilling Program at Desert Star

The program was designed to validate the company's geological interpretation and test the subsurface continuity of priority REE targets defined through surface sampling, detailed ground geophysics surveys, and a district-calibrated 3D geophysical interpretation. Holes were drilled vertically or inclined at -45° to -60°, with depths ranging from 61 m to 198 m downhole. All holes were surveyed with a SlimGyro multishot tool at 20 ft intervals. RC chips were sampled at 5 ft intervals from surface to end of hole, with 562 samples and 56 quality control samples submitted to ALS in Reno, Nevada, and analysed at ALS Vancouver, Canada.

Significant Drilling Intercepts and Mineralisation Styles

The drilling identified two styles of mineralisation: REE associated with apatite in shonkinite dykes, and with monazite and allanite in gneiss and felsic intrusive rocks, subject to further mineralogical confirmation. DS-006 intercepted 13.7 m at 1,717 ppm TREO from 12.2 m and 3.0 m at 2,184 ppm TREO from 38.1 m. DS-002 returned three intercepts within a 41.1 m interval from 64.0 m: 4.6 m at 2,027 ppm TREO, 10.7 m at 1,607 ppm TREO, and 9.1 m at 1,032 ppm TREO, with the hole ending in mineralisation at 1.5 m at 1,146 ppm TREO in the last sample. All reported widths are downhole lengths; true widths are not known.

Assay Methodology and Follow-Up Exploration

REE and multi-elements were analysed by sodium peroxide fusion with ICP-MS finish using ALS method ME-MS89L. A separate re-analysis of 50 samples using lithium borate fusion returned 17% more TREO in aggregate, predominantly within gneiss and granite. All results reported are based on the original ME-MS89L assays and are described as conservative in the filing. The shonkinite dykes remain open and the deeper part of the modelled geophysical anomaly remains untested. The company said its immediate focus is to integrate new drilling data, complete the fusion re-assay program, and systematically rank remaining targets for follow-up drilling.

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