4D twin · seismic-tied
Mesabi Range (cluster)
Cleveland-Cliffs / U.S. Steel · St. Louis / Itasca County, MN · site LTH-MESABI-MN
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438 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.
Biwabik Iron Formation. Magnetite taconite, pelletizing plants along the range.
Capacity
Workforce3,800
Nameplate40,000,000 tpy
Utilization78%
Effective31,200,000 tpy
t / person-year10,526
Landform is site-typed: porphyry pit, block cave, underground vein/reef, Carlin, gravel, quarry. Seismic fences are Vp-banded.