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Pea Ridge, Caldera
Missouri, USA
Main commodities: Fe REE Au




The most recent source geological information used to prepare this description was dated: 2024.     Record last updated: 19/04/2025
This description is a summary from published sources, the chief of which are listed below.
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    Selected References
Aleinikoff, J.N., Selby, D., Slack, J.F., Day, W.C., Pillers, R.M., Cosca, M.A., Seeger, C.M., Fanning, C.M. and Samson, I.M.,  2016 - U-Pb, Re-Os, and Ar/Ar Geochronology of Rare Earth Element (REE)-Rich Breccia Pipes and Associated Host Rocks from the Mesoproterozoic Pea Ridge Fe-REE-Au Deposit, St. Francois Mountains, Missouri: in    Econ. Geol.   v.111, pp. 1883-1914.
Ayuso, R.A., Slack, J.F., Day, W.C. and McCafferty, A.E.,  2016 - Geochemistry, Nd-Pb Isotopes, and Pb-Pb Ages of the Mesoproterozoic Pea Ridge Iron Oxide-Apatite–Rare Earth Element Deposit, Southeast Missouri: in    Econ. Geol.   v.111, pp. 1935-1962.
Childress, T.M., Simon, A.C., Day, W.C., Lundstrom, C.C. and Bindeman, I.N.,  2016 - Iron Oxygen Isotope Signatures of the Pea Ridge and Pilot Knob Magnetite-Apatite Deposits, Southeast Missouri, USA: in    Econ. Geol.   v.111, pp. 2033-2044.
Harlov, D.E., Meighan, C.J., Kerr, I.D. and Samson, I.M.,  2016 - Mineralogy, Chemistry, and Fluid-Aided Evolution of the Pea Ridge Fe Oxide-(Y + REE) Deposit, Southeast Missouri, USA: in    Econ. Geol.   v.111, pp. 1963-1984.
Hofstra, A.H., Meighan, C.J., Song X.-Y., Samson, I., Marsh, E.E., Lowers, H.A., Emsbo, P. and Hunt, A.G.,  2016 - Mineral Thermometry and Fluid Inclusion Studies of the Pea Ridge Iron Oxide-Apatite–Rare Earth Element Deposit, Mesoproterozoic St. Francois Mountains Terrane, Southeast Missouri, USA: in    Econ. Geol.   v.111, pp. 1985-2016
Johnson, C.A., Day, W.C. and Rye, R.O.,  2016 - Oxygen, Hydrogen, Sulfur, and Carbon Isotopes in the Pea Ridge Magnetite-Apatite Deposit, Southeast Missouri, and Sulfur Isotope Comparisons to Other Iron Deposits in the Region: in    Econ. Geol.   v.111, pp. 2017-2032.
Mercer, C.N., Watts, K.E. and Gross, J.,  2020 - Apatite trace element geochemistry and cathodoluminescent textures - A comparison between regional magmatism and the Pea Ridge IOAREE and Boss IOCG deposits, southeastern Missouri iron metallogenic province, USA: in    Ore Geology Reviews   v.116, 22p. doi.org/10.1016/j.oregeorev.2019.103129
Neymark, L.A., Holm-Denoma, C.S., Pietruszka, A.J.,Aleinikoff, J.N., Fanning, C.M., Pillers, R.M. and Moscati, R.J.,  2016 - High Spatial Resolution U-Pb Geochronology and Pb Isotope Geochemistry of Magnetite-Apatite Ore from the Pea Ridge Iron Oxide-Apatite Deposit, St. Francois Mountains, Southeast Missouri, USA: in    Econ. Geol.   v.111, pp. 1915-1933.
Nold, J.L., Dudley, M.A. and Davidson, P.,  2014 - The Southeast Missouri (USA) Proterozoic iron metallogenic province - Types of deposits and genetic relationships to magnetite-apatite and iron oxide-copper-gold deposits: in    Ore Geology Reviews   v.57, pp. 154-171.
Nuelle L M, Day C M, Sidder G B  1991 - Rare earth element- and gold-bearing breccia pipes of the Pea Ridge iron ore mine, Washington County Missouri: in    Soc of Mining, Metallurgy & Exploration, Denver Colorado   Preprint  pp 91-109


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