Riversgold Limited (ASX: RGL) has confirmed multiple lithium-bearing pegmatite dykes grading up to 2% Li from all rock chip samples collected at its new Tambourah Project in Western Australia’s Pilbara region.
Rock chip samples collected at the project returned assays up to 2.0% Li2O with values ranging between 1.5% Li2O and 2.0% Li2O. The samples also returned high Rb (up to 2017ppm) and Ta (357ppm) and Cs (785ppm), confirming highly-fractionated pegmatite with the right LCT chemistry.
Commenting on the update, Riversgold CEO, Julian Ford, said: “These initial rock chip results from Tambourah are highly encouraging and are only from a 200m section of what is potentially a 26km-long mineralised corridor within the tenement.
“These initial rock chip results from Tambourah are highly encouraging”
We are fortunate to have access to a substantial database of modern geophysical data for the Tambourah Project and our strategy is to fast-track exploration by leveraging this knowledge base and the easy access afforded by the gazetted Marble Bar road.”
Four rock chip samples were collected by Riversgold during an initial reconnaissance site visit to Tambourah in January 2022, as part of the due diligence process prior to the acquisition of EV Minerals Pty Ltd.
The samples were taken from two pegmatite outcrops approximately 20m apart and mapped over a strike length of 200m, which is open to north and south.
Assays results received from the samples collected by Riversgold ranged from 1.47% Li2O to 1.97% Li2O and up to 785 ppm caesium.
Mineralised pegmatite sample from TambourahThe company said that the consistency of grade over the long strike length confirms the project’s potential to host a large lithium-caesium-tantalum system, similar to the nearby Pilgangoora (309Mt @ 1.14% Li2O)2 and Wodgina (259Mt @ 1.17% Li2O) deposits.
The main Tambourah tenement (E45/5721) is approximately 25km from top to bottom and 6km wide. Based on the LCT lithium exploration model, the source of the lithium is thought to be the Split Rock Supergroup Granite.
Moving forward, a follow up reconnaissance trip is due to commence commence in the coming week, targeting along-strike extensions and additional priority target areas.
Further work will consist of field mapping and additional surface soil and rock sampling, with drilling to follow.
Images: Riversgold Limited
