VECTORS TO PORPHYRY CU-AU MINERALIZATION IN CARBONATE WALLROCKS AROUND THE BINGHAM DEPOSIT, UTAH, USA
Bingham Canyon comprises a multi-phase sequence of Eocene-aged igneous rocks emplaced within a folded and thrusted Paleozoic carbonate and siliciclastic sequence , producing proximal Cu-Mo-Au porphyry-style mineralization and adjacent Cu-Au skarn deposits in carbonate host rocks, mainly in the Jordan and Commercial beds. Outboard from the porphyry-skarn zones (~0.5-2.5km) there are Pb-Zn-Ag vein and carbonate replacement orebodies, and even more distal (~7-9km) sediment-hosted Au deposits.
A series of vein and wall rock samples were collected beginning at the Bingham Canyon open pit and extending 17km to the W-SW along a transect terminating at the sub-economic Stockton porphyry system. LA-ICP-MS analysis was completed on vein and wall rock calcite. Preliminary analysis reveals a decreasing trend in Fe, Mg, Ba, and several REEs from the Bingham Mine outboard to a distance of ~3-5km, while Mn and Zn display an increase to about 2km distance before dropping off to background levels ~4km outboard. These initial findings are based on 12 samples which we will corroborate through further LA-ICP-MS analysis of additional samples along the transect to produce a robust spatial dataset.
 Piurkowsky, S.E., Chang, Z., and Brunetto, P., 2020, Distal signatures of, and vectors to, hydrothermal ores in carbonates in the Candelaria-Punta del Cobre district, Chile: Geological Society of America Abstracts with Programs, v. 52, No. 6. doi: 10.1130/abs/2020AM-359289
 Porter, J.P., Schroeder, K., and Austin, G., 2012, Geology of the Bingham Canyon porphyry Cu-Mo-Au Deposit, Utah, Society of Economic Geologists, Special Publication 16, p. 127-146