At the Marudi Property, important gold mineralization discovered to date is associated with the medial metachert unit of the Marudi Mountain Formation. Gold occurs within the magnetite- hematite rich quartzite and in the magnetite-silicate iron formation (referred to as BIF or banded iron formation). The association of gold with BIF horizons was recognized at least as early as 1990. Quartz veinlet arrays are commonly associated with these stratigraphic intervals. At outcrop scale, depositional sites were likely controlled by rheological contrasts, delamination along bedding planes, and at permeability boundaries. Diamond drill hole data suggest gold occurs in stratiform zones and is concentrated at primary and secondary fold axes and parasitic folds. However, the extent of the stratabound gold bearing sequences away from fold axes is undetermined at present. Gold mineralization at Mazoa Hill and Marudi Mountain may occur within one or more stratigraphic horizons of metachert that have been folded and re-folded. In a number of high-grade zones sulfide is present (pyrite, pyhrrotite, and ossasional arsenopyrite). Quartz veining is also present in these zones, but by itself is not a strong indication of mineralization. Elsewhere sulfides are scantly disseminated in the core, apparently replacing the primary Fe-oxides.