Measured and indicated resources total 60,000 tonnes of lithium carbonate equivalent, and 270,000t of potash equivalent, with an additional 6000t and 26,000t respectively in the inferred category.
The resource was estimated from a 2.5 sq.km area, and followed 210m of diamond core drilling - comprising two holes bored 80m and 130m respectively.
PepinNini told the market the estimate "forms the basis for subsequent resource estimates from our other projects to allow us to continue to advance to the next level of development for lithium production".
Last month PepinNini secured an investment agreement for up to A$2 million from a New York-based institution, of which $400,000 was paid upfront.
PepinNini said the investment would be used to fund the drilling of a pumping well able to be converted into a production well.
Shares in PepinNini were up 10% to 5.1c in morning trade, capitalising the company at $11 million.
The stock was at similar levels last October before spiking to over 9c around the turn of the year.
