21-6-040: latite - Bristol Bay District - Sill Mine

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Specimen Number21-6-040Comments Crowe research collection, C. Schrader MS thesis.Long piece of core, shows an almost gradational relationship between the porphyritic and equigranular latite phases, hard to say if one crosscuts the other or if it's some sort of magma mixing phenomena.In Teaching CollectionNoMineral(s)quartzk-sparplagioclasehornblendeRock NamelatiteDistrictBristol BayMineSillExternal LinkMindatGeo-LocationDDH 19, 324.5'Deposit TypeEpithermal Low SulfidationGeo-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.

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21-6-040: latite - Bristol Bay District - Sill Mine

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21-6-040: latite - Bristol Bay District - Sill Mine