ProjectsWest Australian Lithium
Pilbara Projects – Western Australia
Western Australia is a premium lithium province with high-grade lithium deposits associated with rare metal pegmatites.
Sayona’s Pilbara leases cover some 1,806 sq km and are centred in the world-class Pilgangoora lithium district, being prospective for hard rock spodumene pegmatite mineralisation (refer map below). The Company’s Pilbara tenure has seen little or no past exploration for lithium.
In August 2019, Sayona agreed to an earn-in with lithium producer, Altura Mining to jointly develop the Company’s Western Australia lithium portfolio. Under the agreement, Altura will spend $1.5 million on exploration across the project portfolio over a three-year period to earn a 51% interest, with Sayona retaining the right to contribute to project evaluation and development.
Welcoming the agreement, Sayona’s Managing Director, Brett Lynch said Altura was the perfect partner to crystallise value for shareholders from the Company’s Australian lithium assets.
“Altura has a highly experienced in-house team that successfully led the financing, construction and commissioning of its spodumene mine at Pilgangoora,” he said.
“It is this expertise that will ensure we derive maximum value from our exploration assets in WA.”
The Mallina project is the most advanced of Sayona’s Pilbara portfolio. Multiple zones of spodumene pegmatites have been identified within a 25 sq km zone.
The pegmatites occur in three main swarms; the western Discovery prospect, the central Area C prospect and the Eastern Group pegmatites. Surface sampling has been encouraging, with rock results up to 4.6% Li2O returned from spodumene pegmatite at surface. Mapping has confirmed the pegmatites can be extensive, with the Eastern No.2 pegmatite being over 1,300m in strike extent and up to 20m in thickness.
Two drill programs of 48 RC drill holes have been completed for total of 3,568m. Selected intercepts are displayed below.
The identification at the Area C prospect of spodumene pegmatite in drilling, from surface and of good intensity (to a maximum 3.18% Li2O), has provided encouraging evidence that the project can host economic grades of lithium mineralisation. The intercept, firstname.lastname@example.org% Li2O, from surface in drill hole SMRC040, remains open at depth and to the east, south and north, where the pegmatite is masked by thin cover.
At the Eastern No.2 Pegmatite drill results include near surface mineralisation extending to some 50m depth. Structural studies indicate the spodumene pegmatites have a moderate plunge and this extension at depth remains untested.
The best result in the area was a down dip drillhole, SMRC042, which was completed to test for grade variations and possible weathering effects, which returned email@example.com% Li2O from 4m, and firstname.lastname@example.org% Li2O from 28m.
The Tabba Tabba project is located in an area of historic tin and tantalum mining. It comprises six tenements covering 588 sq km, located 40km to the north of the Pilgangoora lithium mining area.
The main Tabba Tabba tenement, E45/2364, is centred in an area of historic tin and tantalum mining. Spodumene pegmatite has been identified in adjacent tenure and the Tabba Tabba project provides exposure to the area’s emerging lithium prospectivity.
Within E45/2364, where the Company has the rights to 100% of the pegmatite minerals, exploration has identified three areas of fractionated rare metal pegmatites, as well as seven soil anomalies of LCT type pegmatite geochemistry. None of the prospect areas have been drilled. Geochemistry and target areas are shown in the figure below.
Additional exploration over the broader tenement holding has included rock sampling to identify fractionated granites and pegmatites for a more detailed assessment.
Moolyella and other Pilbara project areas
The Moolyella project is located to the east of Marble Bar. The area hosts a number of lithium, tin and tantalum occurrences, including the historic Moolyella tin field, where explorers have identified spodumene pegmatite associated with the intrusion of the Moolyella monzogranite.
Within the Company’s tenure (three tenements covering 334 sq km a number of lithium-cesium-tantalum albite pegmatites have been identified.
Within the northern portion of E45/4700 rock sampling of mica rich pegmatite has returned up to 1.40% Li2O. Further exploration is required to follow up these encouraging results and to test more broadly the prospective margins of the source intrusions.
Other project areas, including Cooglegong and Wodgina West are grassroots in nature, but each has areas displaying pegmatite fractionation which warrants follow up.
Deep Well Project
The Deep Well tenement covers an area of 119 sq km near Port Hedland. It was pegged to secure an area of interpreted granites prospective for lithium pegmatite and has subsequently been considered prospective for the conglomerate hosted style of gold mineralisation.
The tenement has poor exposure of bedrock but areas of Fortescue aged Mt Roe Basalt crop out in the in the western tenement region, margined by younger Mallina Formation sediments. Elsewhere in the Pilbara, the contact between these units is prospective for gold mineralisation.
At Deep Well, the Upper Mallina succession are also a target, comprising basin margin, high energy sediments, close in age to the Central Rand Group, which hosts the majority of the gold in the Witwatersrand.
Geochemical sampling of oxidised pyrite cubes (metamorphosed authigenic pyrite) has returned elevated gold (to 120ppb Au) as well as anomalous bismuth, molybdenum, antimony, nickel, tellurium, uranium and other pathfinder elements.
Mt Edon Lithium Project
Located in the South Murchison, the Mt Edon Lithium Project covers the southern portion of the Paynes Find greenstone belt and hosts an extensive swarm of pegmatites.
The pegmatites have not previously been assessed for their lithium potential, but have been variably prospected and mined for tantalum, feldspar and beryl.
Reconnaissance exploration has identified lepidolite (lithium mica) bearing pegmatite with a peak assay of 1.57% Li2O. Geochemical results indicate that the pegmatite suite becomes increasingly fractionated towards the west.
Soil Geochemical sampling – Tabba Tabba Project
Pegmatite In Drill Sample – Mallina Project
Mallina Project RC Drilling, Dan O’Neill and Matt Thomas
Geophysical readings – Deep Well Project
Logging Drill Cuttings – Mallina Project
Preparing for RC Drilling, Area C Prospect – Mallina Project
Eastern No.2 Pegmatite Prospect – Mallina Project
Geological Logging – Mallina Project
Marking up Drill Bags – Mallina Project
3.44% Li2O Sample, Spodumene Pegmatite – Mallina Project
Area C Prospect – Mallina Project
Pegmatite Search – Pilbara
Spodumene Pegmatite – Mallina Project