Octava Minerals Ltd (ASX:OCT) has commenced a maiden lithium exploration drill programme at the Pinnacle Well lithium prospect at the Talga Lithium Project in Western Australia.
Pinnacle Well is located 10km to the north of the Archer Lithium Deposit (18Mt @1.0% Li2O) held by Global Lithium Resources.
The RC drilling programme will test the large anomalous lithium halo at Pinnacle Well previously identified through mapping, soil and rock chip sampling. Multiple pegmatites have been identified at Pinnacle Well, including a large 1.5km pegmatite, containing visible lithium minerals. Pinnacle Well is one of a number of lithium targets identified within the highly prospective Talga Project.
“We are really pleased to have the drill rig onsite to test the first lithium prospect at Talga. We look forward to the progress of this initial drill campaign which will be followed by additional drill programs throughout the year,” Managing Director, Bevan Wakelam, said.
Nimerry Prospect
Fieldwork undertaken by Octava Minerals on the recently identified Nimerry Lithium prospect during January and February 2023 has identified multiple outcropping pegmatites up to 30m wide and 60m long, occurring as swarms, hosted within greenstones close to the granite greenstone contact, which is an important target geology used in the discovery of lithium mineralized pegmatites in the Pilbara.
177 broad spaced rock chip samples were collected from weathered outcropping pegmatites, in an area extending east of the soil sampling programme completed in late 2022 with the potential for additional concealed pegmatites to exist beneath colluvium and alluvium identified in other areas of the prospect. Samples were submitted for analysis by 4-acid digest with an ICP-MS finish.
Rock chip assays show the presence of peak lithium values up to 716ppm within pegmatite, however in rockchips, lithium values in excess of 50ppm are considered encouraging and warrant follow up work, continuing the same systematic approach to exploration as has been conducted at Pinnacle Well.
In addition, key indicators of pegmatite fertility include K/Rb ratio < 150, Nb/Ta ratio < 5 and Zr/Hf ratio < 18, with a significant number of samples collected across the Nimerry Prospect exhibiting these positive characteristics, indicating a higher degree of fractionation moving away from the Mt Edgar Batholith within pegmatites intruded into foliated mafic greenstones.
Further exploration is being undertaken in and around the Nimerry Prospect area to define further targets for drilling.
For further information please visit: https://octavaminerals.com/
