They haven't mentioned Lepidolite or Mica just that its showing...

They haven't mentioned Lepidolite or Mica just that its showing characteristics prospective for Lithium mineralisation.

They have mentioned 'muscovite'. The below excerpt is from geoconvemtion.com and in a nutshell explains its potentialities. Still early days but very promising given still 70% of the project yet to be traversed and sampled....let alone drilled.

Conclusions
Muscovite is an effective indicator mineral for identifying prospective Li-bearing pegmatites. However, multiple muscovite samples are required with both field and laboratory techniques as there is an overlap of Li concentrations between prospective and non-prospective dikes. Muscovite is also useful for identifying dikes with potential for rare metals Nb and Ta. This is very useful as columbite group minerals are typically very fine-grained and difficult to identify in the field.