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Highest grade assays confirm significant resource expansion potential likely at Bradda Head’s basin project in Arizona

Published by , Editorial Assistant
Global Mining Review,

Bradda Head Lithium, the North America-focused lithium development group, has announce the assay results from the first five drill holes of the Basin East Extension (BEE) 2023 drill programme; delivering the highest-grade assays in all four drill programmes to date and confirming that lithium bearing clay continues and thickens to the west, northwest and north into its BEE lease. These significant indicators are expected to lead to significant resource expansion for the Company in 2H23.


  • The first assays received back from the 2023 drill programme at Basin are very encouraging, with the highest grade and thickest high-grade upper clay unit sections seen to date, including 63.12 m @ 954 ppm Li in BES-23-03, 66.92 m @ 1077 ppm Li in BES-23-04, and 63.71 m @ 944 ppm Li in BES-23-05.
  • Notable high-grade intervals are: 24.32 m @ 1327 ppm Li in BES-23-03, 18.30 m @ 1602 ppm Li in BES-23-04, and 32.93 m @ 1029 ppm Li in BES-23-05. The highest-grade assay received to date of 2676 ppm Li over 1.8 m was recorded in hole BES-23-05 at a depth of 109.32 m.
  • Drilling commenced in March at BEE, and of the 25 holes planned, the first six drill holes have now been completed and hole 7 is midway through.
  • The first four holes (south of the creek) located in BEE and Basin East (BE) have continued to demonstrate that the upper clay unit, is significantly higher grade that the lower clay unit, and thickens to the North and North-west direction into BEE.
  • Holes 05, 06 and 07 (the first on the north side of the Creek) confirm this, have a similar upper clay thickness to holes 03 and 04, and also demonstrate the upper clay thickens to the north, northwest, and west as well towards Basin West.
  • Hole 07, on the western border of BEE and BW confirms the upper clay unit continues to thicken to the west, which is very positive for resource expansion potential into BW. Hole 07 is not complete but so far has the thickest upper clay unit encountered to date and is still in upper clay.
  • The total upper clay unit is 78 m, 67 m, 69 m, and 79 m, thick for an average of 73 m, in holes 03, 04, 05, and 06 respectively. To put that in context the average thickness of the upper clay unit is 34 m in all the previous 34 holes that intercepted upper clay in the last three drill programmes (2018, 2021, and 2022).
  • BHL expects to drill up to a further 18 holes at BEE, BE and BN - BEE is adjacent to BE, and BN joins with BEE’s northern border. Prior to this programme, c. 1.4 km2 of the area has been drilled, leading to a Mineral Resource of 371 kt of LCE.
  • During this programme the company will continue to focus on ensuring work is carried out with as little disturbance as possible.
  • The company expects to provide the geological results of the remaining drill holes and assays when received and a revised resource estimate will follow after all assays are received.

Charles FitzRoy, CEO of Bradda Head, commented: “These assay results are very encouraging and are showing higher grade and greater upper clay zone thickness than previously encountered at Basin; We expect a significant resource upgrade from this programme in H2 of this year. The analysis of holes 5, 6 and 7 which are the first holes Bradda has ever drilled to the north of the creek, is particularly exciting as it indicates the presence of a completely intact clay sequence which has been preserved by a basalt layer; meaning that the lithium bearing clays at Basin East extend across the creek and open up significant resource expansion potential. The assays for hole 5 support our blue-sky model for what we forecast at BEE and on to Basin West. These assays further strengthen our thesis at Basin and we believe our 2023 drill programme will generate material catalysts for the Company which will lead to a further significant resource upgrade in H2 of this year. We look forward to providing further updates as the results from our drilling programme become available.”

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