Summit is picking up the pace at its Windfall antimony project near Kempsey, New South Wales, after completing a first pass field program with rock chip and soil sampling.

A total of 26 samples – divided evenly between rock chip and soil samples – were taken by the program, which identified several outcrops of quartz breccia up to 350m long and 3m wide.

Summit Minerals (ASX:SUM) notes that the observed sulphide mineralisation occurs as quartz + stibnite (antimony sulphide) and calcite breccia-fill.

Additionally, some identified east-west trending veins could represent new discoveries that extend mineralised trends to the east while lidar has indicated that historical mines are confined to elevated areas, leaving extensions to mineralisation in lower areas poorly considered and tested.

This is intriguing given antimony’s use as a hardening agent in lead for lead-acid batteries, semiconductors and as a fire retardant among other things

Windfall project

The 240km2 Windfall project includes multiple historical antimony mines within the Munga Creek Group, which was last operational in 1974 and produced over 1100t of antimony metal.

Notably, this was produced at grades to 63% antimony, the highest grade ever recorded in Australia, and included gold grades to 6 grams per tonne.

Summit has now expanded its landholder engagement process to the Pinnacles and Tooroka Groups and anticipates completing similar first-pass exploration in those areas soon.

It has also started UltraFine+ multi-element soil sampling at Munga Creek to test the identified locally mineralised veins and their extensions beneath recent cover.




This article was developed in collaboration with Summit Minerals (ASX:SUM), 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.