Mineralization styles and ore-forming conditions of the quartz-fragment-rich breccia (QBX) at the Didipio alkalic porphyry Cu-Au deposit, Nueva Vizcaya, Philippines

•The QBX at the Didipio Cu-Au porphyry copper deposit exhibits two gold mineralization styles.•Early porphyry-style mineralization is associated with low grade breccia.•Late epithermal-style is associated with moderate-high grade breccia.•Native gold has a close relationship with Te-, Bi-, Se- minerals.