Gravity Survey At The Basin Clay Project

Gravity Survey At The Basin Clay Project

BRITISH VIRGIN ISLANDS – Bradda Head Lithium Ltd. reported on the gravity survey conducted at its Basin clay project in Arizona. The gravity survey was completed in late 2023 and post-processing has revealed a significant gravity low over the Basin North area, interpreted as a deep, depositional centre for sedimentary rocks and a deep basement rock geological setting.

Results and location of gravity low (deep blue) have been interpreted to represent thicker clay beds, in both the Upper and Lower Clay sequences – potentially substantially thicker than the previous reported lithium-in-clay intersections from our current 43-101 compliant Resource. Gravity results also led to the reconnaissance on ground 1.6km to the north but contiguous to our existing Basin licences where new clay and distinct marker bed silica nodules were discovered, indicating the entire clay sequence sits in a shallow setting below post-mineral tuffs and basalt layers.

The results of the gravity survey and field reconnaissance prompted the staking of 2.8km2 of new lode and placer claims to the north on open BLM land, expanding the clay potential significantly. Excellent opportunity to grow the clay deposit to the north and especially to the west where Bradda has over 11km2 of property to explore, and adds confidence to our intent to reach a new resource of +2.5mt of Lithium Carbonate Equivalent (LCE) at the end of the upcoming drilling campaign.

The survey was the first-ever gravity geophysical survey of this kind conducted at Basin and covers the entire property, having collected 130 points across approximately a 32km2 area. Sample stations were collected into basement rock, which consists of Precambrian granites and granodiorite, and then across the center of the Basin property which consists largely of clays, tuffs, and basalt layers. Most importantly, the gravity low corresponds to the thickening of the Upper Clay horizon and potentially the Lower Clay horizon, providing encouragement that the Upper Clay continuing with similar thickness to the north for another 2.7km from the last drill hole (BES23-14) in 2023.

An additional 39 lode claims (2.6km2) were added further to the north, in order to secure opportunities across Basin North. These cover potentially thick clay sequences and, in the process, discovered clay outcrops in the northeastern portion of the newly added claims. The clays have similar attributes to what is visually seen at Basin East and Basin West with silica nodules giving us confidence that the Upper and possibly Lower Clays continue uninterrupted under tuffs, basalts, and fluvial conglomerates.

The gravity survey also covers Basin West, showing gravity lows corresponding to lithium anomalous, >1,000ppm Li in clay outcrops, providing confidence of extensive clay extent throughout the property to the west and northwest.