Image processing and 3D modelling of detailed gravity survey data -acquired across three regional target areas of the Tarcoola Gold Project in South Australia – has revealed multiple prospective structural targets.

Several of these targets were first identified by Barton Gold Holdings (ASX:BGD) through reprocessing of existing seismic data and new magnetic and ground penetrating radar (GPR) surveys during 2020 and 2021.

Gravity surveys have also identified a new, previously unrecognised large-scale anomaly beneath Mining Lease 6455, which hosts the Perseverance open pit mine and prospects immediately to the west and east.

BGD says the prospective structures correspond with structures clearly observable in the gravity data and provide confidence in the targeting methodology.

A strong density anomaly that crosscuts the geological strike has also been identified immediately to the northwest of the School prospect.

Rapidly building new geological model  

BGD managing director Alexander Scanlon said Barton is rapidly building a new geological model for Tarcoola by combining traditional and innovative technologies.

“These exciting results cross-validate our prior interpretations of multiple historical and new data sets, reinforcing the significant geological prospectivity for multiple regional discoveries at Tarcoola.

“Significant growth of Tarcoola’s mineralised footprint will be a high priority for Barton during 2022.”

Ealbara prospect

Ealbara is in the northern part of the Tarcoola project area on the Lake Labyrinth Shear Zone (LLSZ) and will be a priority target in Barton’s upcoming regional drilling program.

The LLSZ is a major fault zone known to host significant gold mineralisation at Indiana Resources Limited’s nearby Minos and Ariadne prospects where drilling has intersected broad, high-grade gold mineralisation.

Inversion modelling of gravity data supports a strong correlation of density bodies within the interpreted position of the LLSZ, further validating the prospectivity of this target.

Tarcoola western targets

A major gravity-high signature around the eastern margin of a significant gravity-low, which is interpreted from Barton’s high resolution aeromagnetic data has also been spotted.

BGD believes density-high may represent alteration along this margin and the setting is considered highly prospective for gold mineralisation.

The Dark Hill prospect is along the trend of the gravity high on the contact with mapped Paxton Granite and is a priority target for drill testing.

The gravity data has also highlighted the northern contact of the Paxton Granite and the major east-west structural trend through the Warburton prospect, which has previously been identified as a priority target for drill testing.

Looking ahead

Barton plans to further integrate the targets within existing geological, geochemical, and geophysical data sets to refine and prioritise targets for upcoming drill testing.




This article was developed in collaboration with Barton Gold, 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.