The Bynoe Project comprises exploration licenses covering a total area of 90km2 and is located ~40km SSW of Darwin, Northern Territory. The Project area has numerous locational advantages over other spodumene projects including:
Figure 1: Bynoe Project – Location Plan
Multiple phases of prospecting, exploration and mining have been undertaken in the Bynoe area since the 1880s, with more than 60 pegmatites identified within the project area (see Figure 2).
All previous exploration and mining have targeted tin and tantalum mineralisation, either hosted in alluvial deposits or within the strongly weathered, upper 10-20m of the bedrock profile where mining would be free-digging.
The Project area is the largest historical producer of tantalum minerals in Northern Territory until the mines closed in the late 1990s. Like the former tantalum mining areas of Greenbushes and Wodgina, the areas lithium potential has largely been ignored until recently.
In July 2016, Liontown confirmed the presence of spodumene-bearing pegmatites of attractive grade and thickness in the Bynoe project area (see ASX release dated 26th July 2016).
In September 2016, Core Exploration Ltd. announced the discoveries of lithium mineralisation within the same pegmatite field.
Figure 2: Prospects within the Bynoe Project
The Project lies in the western part of the early Proterozoic Pine Creek Geosyncline, where it comprises a sequence of greenschist metamorphic grade sandstones and siltstones with occasional lenses of conglomerate.
More than 60 pegmatites, many containing tin and tantalum, have been identified. The pegmatites range in size from narrow fracture fillings to massive bodies >50m thick and >200m long.
In July 2016, Liontown announced the discovery of a spodumene-bearing pegmatites including the Sandras and BP33 pegmatites. Best results, which included intercepts of 42m @ 1.0% Li2O from 93m and 24m @ 1.1% Li2O from 70m, were returned from the Sandras’ prospect (Figure 3) where a pegmatite up to 40m thick and at least 300m long has been defined from surface with strike extensions obscured by transported cover.
In September 2016, Core Exploration Ltd. announced it had intersected lithium mineralisation at BP33, directly along-strike to Liontown’s BP33 pegmatite intercept. This announcement was soon followed by the announcement of high-grade lithium intercepts at the Grant’s prospect, further underlining the district-scale lithium mineralization occurring at Bynoe.
In November 2016, Liontown announced the completion of the Phase 2 drilling program at Bynoe. Better results from drilling at Sandras included 27m @ 1.1% Li2O from 94m, including 3m @ 1.5% Li2O and 2m @ 1.8% Li2O; and 28m @ 1.0% Li2O, including 2m @ 1.6% Li2O, and 3m @ 1.5% Li2O and 3m @ 1.5% Li2O.
Figure 3: Pegmatite of the Sandras prospect with drilling from Liontown’s 2016 drill program.
In 2016, Liontown and Core Exploration confirmed the project’s prospectivity with the discovery of lithium spodumene-bearing pegmatites of attractive thickness and grades exceeding 1% Li2O. More than 50 pegmatites remain untested in Liontown’s properties within the Bynoe Project area, suggesting Bynoe could represent a significant new lithium district located near to existing port infrastructure.
Further soil sampling by Liontown has defined wide anomalies of lithium-in-soils, including along strike to Core Exploration’s Grant’s discovery and include soil anomalies greater than those seen at Sandras (see ASX release dated 6th December 2016, and Figure 4 below). These anomalies remain untested by drilling.
Figure 4: Bynoe project – EL30015 soil sampling
Since acquiring the Project in February 2016, Liontown has completed two programs of drilling:
More than 50 pegmatites remain to be tested at Bynoe (Figure 2), including many with co-incident lithium soil anomalies. A jointly-funded aeromagnetic survey is scheduled to commence in December 2016 and further drilling is scheduled for the June quarter of 2017.
The Bynoe Project comprises 3 separate, granted exploration licences (EL29699, EL30012 and EL30015) and 2 smaller tenements (MLN16 and EMP28651) which are located within EL30015. The combined tenement package covers a total area of ~90km2 area and is located 20-50km SSW of Darwin in the Northern Territory.
EL30012 and 30015 are subject to an Option Agreement with private company Orema Pty Ltd. Liontown may earn 100% equity in the tenements by:
MLN16 and EMP28651 were purchased from A & SF Maddalozzo Pty Ltd for $75,000 cash plus transaction costs.
EL29699 was purchased from Au Exploration Pty Ltd for $5,000 cash plus transaction costs.