4D twin · seismic-tied
Safford
Freeport-McMoRan · Graham County, AZ · site LTH-SAFFORD-AZ
Loading twin…
1111 m NAVD88 · Vp low —— high
Ore–seismic crosswalk
Each shell is tied to the survey that would image it. Desk compilation from published USGS / industry methods — not the operator’s confidential cube. Not a reserve.
| Ore shell | Survey | Method | Year | Tie | Vp m/s |
|---|
PhD geological read
User-initiated. Grounded in MCS 2026, the mapped ore shells, and the seismic crosswalk. Not a reserve.
Lone Star and Dos Pobres leach-only porphyries. Chalcocite blanket, no mill.
Capacity
Workforce800
Nameplate90,000 tpy
Utilization80%
Effective72,000 tpy
t / person-year113
Landform is site-typed: porphyry pit, block cave, underground vein/reef, Carlin, gravel, quarry. Seismic fences are Vp-banded.