| Lat / long: | 38.12506, -91.04179 |
| Primary: | Iron |
| Secondary: | Phosphorus-Phosphates |
| Ore: | Apatite, Hematite, Magnetite |
| Gangue: | Barite, Calcite, Fluorite, Pyrite, Quartz |
| Orebody form: | CRET-SHAPED TABULAR MASS, LENTICULAR MASSES |
| Discovery year: | 1954 |
| Operation type: | Unknown |
| Production size: | Large |
| Development status: | Producer |
| First production started: | 1964 |
| Host type: | Rhyolite |
| Associated type: | Diorite,Rhyolite |
| Structure: | A Major Fault Striking N 80 Deg W And Dipping 45 Deg Ne, 2 Sets Of Magic Dikes, One Striking N 60 Deg E And The Other N 85 Deg E, Aplitic Dikes N 25 Deg W |
| Tectonic: | Ozark Uplift |
| Alteration processes: | Sericite, When Found, Occupies The Position Normally Occupied By Quartz. It Appears That Late-Stage Hydrothermal Activity With Excess Available Oxygen Could Explain The Genesis Of The Massive Hematite. |
| MRDS | D008175 |
| DEP | 10090126 |
| Reference | {Deposit:: HAYES, W.C. AND GUILD P.W., 1967, IRON, MINERAL AND WATER RESOURCES OF MISSOURI, VOL XLIII, SECOND SERIES, P. 74-87}{Deposit:: MINERALS IN THE ECONOMY OF MISSOURI, 1979, BUREAU OF MINES, U.S. DEPARTMENT OF THE INTERIOR, P. 5-6}{Deposit:: WHARTON, H.M. AND OTHERS, DEC 1969, MISSOURI MINERALS, MISSOURI GEOLOGICAL SURVEY AND WATER RESOURCES, ROLLA, MISSOURI P. 51-57 AND P. 223-226.}{Deposit:: MERAMAC IRON ORE PROJECT STARTS PRODUCTION AT PEA RIDGE, ENGINEERING AND MINING JOURNAL, APRIL 1964 P. 93-108}{Deposit:: EMERY, J.A., GEOLOGY OF THE PEA RIDGE IRON ORE BODY, ORE DEPOSITS OF THE U.S., 1933-1967, VOL 1, P. 359-369.}{Production:: STATISTICAL REPORT, MISSOURI DEPARTMENT, DIVISION OF STANDARD INSPECTION LABOR MINES} |
| Reporter | Dulin, Lise, A. (Orris, Greta J.) |