| The Murray deposit is a Carlin-type gold deposit located in the Jerritt Canyon district, Elko County, Nevada. Unit 3 of Silurian-Devonian Hanson Creek Formation is the primary host for Au mineralization and is locally decarbonatized, silicified and dolomitized. Dikes in the deposit are argillized, sulfidized, silicified, and contain hydrothermal apatite. Apatite from one of the dikes yielded a date of 36.3 ± 8.2 Ma.; The New Deep fault acted as the primary fluid flow pathway for Au and associated pathfinder elements. Ore-related fluids also were moved along apparent randomly oriented structures. Later, northeast-trending structures developed, resulting in the left-lateral offset of the New Deep fault.; δ13C and δ18O transect data indicate that these isotopes can be used to identify favorable fluid flow paths, but the lack of correlation with Au for both δ13C and δ18O suggests that isotopes reflect rock volumes which reacted to fluids that were not necessarily contemporaneous with gold introduction. |
