The survey is targeting areas that have been identified as the most prospective for Northparkes and Cowal style gold-copper deposits.
The immediate focus is the Southern Ordovician area complements recently completed mapping and sampling programs.
The survey is expected to commence the second week of September with results available early October.
Rimfire’s CEO John Kaminsky said: “This gravity survey is a logical next step to further leverage the invaluable mapping and sampling work to date in this highly prospective and emerging Southern Ordovician Volcanics area, which was previously unrecognised.
“The gravity survey will provide an important extra layer of data to help guide our subsequent drilling in the gravity surveyed areas.
“Close space gravity previously used by the company provided an excellent correlation to the spatial position of the Sorpresa gold and silver discovery.
"On a larger district scale, anomalous gravity lows coincident with magnetic highs have been representative geophysical signatures of deposits at Cowal and Northparkes.
“Variations on these deposit themes are possible at Fifield, given the geological and geochemistry setting, with gravity providing further insights.”
Fieldwork results from July 2018 in the Southern area of its Fifield Project has highlighted the potential for large-scale gold mineralisation.