Four Nines Gold (CSE:FNAU) has commenced a geophysical survey at its Hayden Hill Gold Project in northern California, US, ahead of a fully funded maiden drill program this summer.
The company engaged Zonge International to complete the program through its Reno office.
The survey aims to map subsurface physical properties and provide insight into potential extensions of mineralised veins, feeder structures, faults, and breccia zones beneath and around historically mined areas.
3D geological modelling indicates potential for structurally controlled gold mineralisation beneath and peripheral to historically mined areas that have not been systematically explored for nearly three decades.
Historical operators mined approximately 480,000 ounces of gold and 1.3 million ounces of silver from the property, primarily using a shallow disseminated mineralisation model.
The company’s technical team believes modern structural interpretation indicates additional high-priority targets beneath and adjacent to the historical pits.
The program includes induced polarisation and resistivity surveying across the property, complemented by a controlled-source audio-magnetotelluric line to enhance deeper structural imaging.
“Every dataset we collect continues to reinforce the quality and scale of the opportunity we see at the Hayden Hill Gold Project,” President Charles Ross says.
Four Nines has a right to acquire 100% of the Hayden Hill Gold Project from a subsidiary of Kinross Gold (TSX:K). The project was explored by Amax Gold through 99,862m of drilling in 742 holes, with no systematic exploration since the mine closed in 1997.
The company has received drill permits from Lassen County, with 10 approved drill locations and field activities underway as of June 2026.
Four Nines Gold is advancing the Hayden Hill gold-silver project in California, with a fully funded maiden drill program scheduled for summer 2026.
Write to JC Villarba at Mining.com.au
Images: Four Nines Gold
