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Location: 54 Km NW from Pagadian, Philippines
Brgy. Depore, Bayog, Zamboanga del SurPhilippines7011
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The Balabag gold-silver mineralization is interpreted as a low-sulphidation epithermal vein system hosted in andesitic lava flows and pyroclastics. Multiple-stage massive to crustiform banded fracture-fill and breccia cement assemblages mostly comprising of chalcedonic to mosaic quartz, in paragenetic association with less abundant adularia, chlorite, illite and carbonate enclosing and dispersed with only minor amounts of sulphide, define a lowsulphidation epithermal environment of precious metal mineralization. The hydrothermal fluid flow and resulting mineralization have taken place at around 220 to 240°C. Three major quartz vein systems identified in the Balabag Hill area are the Tinago-Unao-UnaoYoyon veins to the north, Miswi veins in the east and Lalab veins to the south. The veins exhibit various epithermal quartz vein textures such as colloform, crustiform, massive, drusy, vuggy, comb and cockade textures. Multiphase brecciation textures are also dominant probably because of several pulses of rising hydrothermal fluids. Quartz stringers and quartz stockworks also occur adjacent to most quartz veins ranging from hairline to centimeter sizes. The geometry of the veins and the associated stockworks is generally subhorizontal at the Tinago and Miswi areas while a sub-vertical attitude of veins is exhibited in the Lalab area.The known mineralization zones at Balabag Hill area either have an east-north-east (Tinago and Unao-Unao), northeast (Miswi) or north-northeast (Lalab) trend. The east-northeast striking mineralization zones have gentler dips (37-50°) to the north or northwest while north-northeast and northeast trending vein zones are moderately to steeply dipping (50-80°) to the northwest. The east-northeast to east-west trending and gently to moderately dipping vein zones occur as tension fractures or gashes while the northeast and north-northeast trending ones are the extension fractures which were filled with silica-quartz-sulfide veins.Reconnaissance geological and geochemical surveys were conducted covering the whole Balabag MPSA tenement. Principal mineralization and/or deposit types that have been recognized and delineated because of the reconnaissance survey include the following:- Epithermal Au – Ag mineralization in Balabag;- Epithermal Au prospect in Malagak and Depore – Genaro Rivers;- Porphyry Cu – Mo style of mineralization at Legumbong;- Cu skarn style of mineralization at San Pedro – Dipili;- Base metal mineralization in Upper Dipili.The most prominent mineralization is the high-grade epithermal Au-Ag mineralization at Balabag Hill. Follow-up mapping and sampling, detailed geological surveys and resource drilling have been implemented at the Balabag Hill area. The Balabag Project hosts quartz-gold-silver mineralization associated with a low-sulphidation epithermal vein system characterized by quartz veining, brecciation, stockworks and silica replacement. High gold and silver grades are associated with quartz veins and breccias having multiple and overprinting epithermal quartz textures and hydrothermal brecciation.
