Gascoyne Lithium Project, Western Australia
Segue controls over 1,100km2 of exploration licences (granted and applications) in the Gascoyne Region of Western Australia. Segue owns a 100% interest in five tenement applications (covering 890km2), with one tenement (E09/1618) subject to an earn-in joint venture (Mortimer Hills JV). The Project is being explored for lithium-caesium-tantalum (LCT) pegmatites.
In June 2016, Segue completed a maiden fieldwork programme, aimed at assessing the fertility of intrusive granitic suites within the Project area to host LCT deposits. Three granite suites were extensively rock chipped and assayed, with the Thirty Three Supersuite demonstrating fertile fractionation trends (Mg/Li and Nb/Ta ratios). Segue has secured the majority of the "target zone" which is within 10km of the Thirty Three Supersuite.
The Project has a well-developed drainage network suitable to first pass surface geochemical exploration. As a result, Segue undertook a project-wide stream sediment sampling programme with the aim of identifying prospects with LCT pathfinder anomalism. The highest priority target area was Reid Well, where a 10km2 multipoint anomaly was defined in sediments within 3km of a granite of the Thirty Three Supersuite.
Figure 1 - Reid Well stream sediment sampling anomaly
Reid Well LCT Prospect
In March 2017, Segue announced it had discovered significant lithium and tantalum mineralisation at the Reid Well Prospect. Assays from an initial batch of rock chips confirmed the existence of a complex zoned pegmatite with assays up to 1.02% Li2O and 530ppm Ta2O5.
The rock chips were collected from the outcropping outer margin of a pegmatite covering 1km x 250m within Segue's 100% owned tenement application E09/2169. A total of 12 samples returned lithium results above 0.3% Li2O and over 40 samples contained tantalum grades over 100ppm Ta2O5.
Further results from rock chips, soil samples and petrographic studies are expected to be announced in April 2017.