Dreadnought Resources Limited (ASX: DNO) has identified a number of follow-up targets after receiving the results of 3D inversion of the detailed magnetic and gravity surveys at the Fuso and Paul’s Find Cu-Au targets in the West Kimberley region of WA.
Managing Director, Dean Tuck, said the 3D inversion at the Fuso Cu-Au target has refined and confirmed an intense south-east dipping magnetic anomaly with a central gravity anomaly associated with demagnetisation.
He said this geophysical signature is typical of Proterozoic Cu-Au deposits such as those seen in Tennant Creek and Mt Isa and that with ~1.7km of strike on the magnetic anomaly and ~500m of strike on the gravity anomaly, the target has significant scale.
Dreadnought is excited about the results of these surveys which highlight the scale and attractiveness of our targets in an area which seen no exploration since 1978,” Mr Tuck said.
Fuso and Paul’s Find are large and intense coincident magnetic-gravity targets completely undercover with an abundance of Cu-Au-Bi-Sb smoke.”
In 2019, Dreadnought undertook a detailed airborne magnetics survey which highlighted several magnetic anomalies. Most of the anomalies are located undercover with no outcrop. To prioritize these anomalies and to define a target for drill testing, a 200m x 50m ground gravity survey was also undertaken. These surveys resulted in defining two coincident magnetic and gravity anomalies at Fuso and Paul’s Find.
As both targets are undercover, the magnetics and gravity data were then used to create a 3D Inversion model to better constrain the geometry of the anomalies and to define drill targets.
At Fuso, there is an intense magnetic high surrounding the northern extent of a strong density anomaly. Inversion modelling suggests a south to south-easterly dip with the top of the anomaly at 50-100m depth. The ~500m x 400m ovoid gravity feature is cupped on the northern side of the ~1,700m x 700m magnetic anomaly. The magnetic anomaly is interpreted to be related to intense iron rich alteration, either as magnetite or pyrrhotite and the gravity signature conceptually represents the mineralised lode.
At Paul’s Find, there is an intense, isolated, reversely/permanently magnetised anomaly with a coincident density anomaly. Inversion modelling suggests that the isolated feature is located near surface with dimension of ~300m x 200m. The magnetic low is interpreted to be remnant magnetisation associated with a mineralised lode.
Both Fuso and Paul’s Find are located in close proximity to a high-K felsic intrusion and a splay in crustal scale structures, both of which have known outcropping Cu-Au mineralisation.
RC drilling at Fuso will be designed to test the contacts of the magnetic and gravity anomalies as well as the centre of the gravity anomaly. At Paul’s Find, RC drilling will be designed to test the coincident magnetic and gravity anomaly.