Mineralization is present in quartz veins and stockwork or breccia with disseminated pyrite.

Source: https://investingnews.com/freegold-appoints-maurice-tagami-to-board-of-directors/

The Tropico breccia is hosted within finely bedded siltstones and dirty limestones, interpreted to be part of the Proaño group which hosts the major Fresnillo deposits.

Source: https://theclarion.ca/media-release/radius-gold-discovers-gold-mineralized-hotspring-type-sinter-and-breccia-pipe-target-in-fresnillo-district-zacatecas/?utm_source=rss&utm_medium=rss&utm_campaign=radius-gold-discovers-gold-mineralized-hotspring-type-sint

The upper zone of copper mineralization encountered within ST23-03 is a 48.6m thick interval of strong breccia and vein-style copper sulfides grading 3% Cu, with broad zones of semi-massive to massive sulfide from 34.4m downhole.

Source: https://investingnews.com/lumina-gold-to-present-at-the-metals-and-mining-virtual-investor-conference-october-4th/