Specimen Number28-4-039Alternate NumberBJT-149Commentsfrom Crowe research collection; B. Tracy MS thesis materials.In Teaching CollectionNoMineral(s)epidotemagnetitepyritequartzField Notespropylitized granodioriteRock Namealtered granodioriteDistrictBristol BayMinePebbleExternal LinkMindatGeo-LocationDDH105 315ft.Deposit TypePorphyry CopperGeo-Coords[1] Reference MaterialACL-156: Berg, H.C. and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska; U.S. Geol. Surv. Bull. 1246, Washington, D.C., 254 p.
Schrader, C.M., 2001, Geochronology and Geology of the Pebble Cu-Au-Mo Porphyry and the Sill Au-Ag Epithermal Deposits, Southwest Alaska; University of Georgia MS thesis, 109 p.
Tracy, B.J., 2001, Geology and Ore Fluid Geochemistry of the Pebble Cu-Au Porphyry Deposit, Southwest Alaska; University of Georgia MS thesis, 148 p.
28-4-039: altered granodiorite - Bristol Bay District - Pebble Mine. Franklin College Collections, accessed 11/11/2025, https://digitalcollections.franklin.uga.edu/nodes/view/35779