MinRex has the lithium scent at Sisters as drilling uncovers pegmatites

MinRex’s lithium exploration appears to be on the right track with most of the 15 first pass RC drillholes at the Sisters project in WA intersecting extensive thick stack sheeted pegmatites.

Notable results are 21m of pegmatite from a down-hole depth of 134m (MBRC001) and multiple intervals of 4m from 12m, 4m from 26m, 14m from 65m, 8m from 167m and 7m from 199m in hole MBRC014.

Adding further interest for MinRex Resources’ (ASX:MRR), ground reconnaissance and rock chip sampling over the Southern Zone has identified two extensive lithium and previously unknown bearing pegmatites within the Apex Basalt Greenstone.

Strongly anomalous samples

Three strongly anomalous rock chip samples assayed between 0.21% Li2O and 0.29% Li2O while anomalous rubidium assays from 121 to 776 ppm are key indicators for potential lithium mineralisation in weathered environments.

“We are delighted in the very early stage of drilling to have intersected stacked pegmatites sheets that have extensions at depth from the outcropping high-grade lithium samples delineated earlier in the year,” managing director George Karageorge said.

“This has confirmed the geological model which supports the stacked sheeted pegmatites are continuing at depth from surface.”

He added that the company will move to imminently test the new pegmatite zones as they lie beneath alluvial floodplains that may conceal further stacked sheeted pegmatites to test extensions in all direction.

“Further mapping and sampling programs are ongoing at generating targets along strike over the north-west of the Sister’s [project as the historical elevated lithium soil samples will be mapped over all outcropping pegmatites over the project area,” he added.

Sisters project

The Sisters project, which was granted in early August, is just 1.75km east of and within the same greenstone belt as Global Lithium’s Archer deposit which has a defined resource of 10.5Mt at 1% Li2O.

Extensive pegmatites were delineated within granite-greenstone “goldilocks zone” that are typical of all major lithium deposits in the Pilbara region.

Two zones of spodumene rich pegmatites – stretching a combined 500m in length and 250m in width – were located in the southern zone of E45/5871 striking in a north-south direction with the greenstone lithology.

Initial drilling has focused on areas where early rock chip sampling had returned high-grade results.

This article was developed in collaboration with MinRex Resources, a Stockhead advertiser at the time of publishing.

This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.