One of the most important ores for REE mineralization are iron oxide–apatite (IOA) deposits. The Posht-e-Badam Block (PBB) is a part of the Central Iranian geostructural zone which is the host of most important Fe deposits of Iran. Exploration studies of the IOA deposits within the PBB (e.g. Esphordi, Gazestan, Zarigan, Lak-e-Siah, Sechahoun, Chahgaz, Mishdovan, Cheshmeh Firouzi and Shekarab) demonstrate that these deposits contain high contents of REE. Concentrations of ΣREE in the most important IOA deposits of the PBB include the following: the Esphordi deposit varies between 1.2 and 1.88%, the Gazestan deposit between 0.17 and 1.57%, the Zarigan deposit between 0.5 and 1.2% and the Lak-e-Siah deposit varies between 0.45 and 1.36%. Concentrations of ΣREE within the apatite crystals present within the IOA ores in the Esphordi, Lak-e-Siah and Homeijan deposits have ranges between 1.9–2.54%, 1.9–2.16% and of 2.55%, respectively. These elements are mainly concentrated in apatite crystals, but other minerals such as monazite, xenotime, bastnasite, urtite, alanite, thorite, parisite–synchysite and britholite have been recognized as hosts of REEs, as small inclusions within the apatite crystals, and in subsequent carbonate, hematite–carbonate and quartz veins and veinlets. Given the extent of this block and the presence of several IOA deposits within this block, and also the high grades of REEs within these deposits, one can reasonably state that it is obvious that there are significant resources of REEs in this part of Iran.
Abedian, N. 1983: Detailed exploration on Esphordi phosphate deposit. – Geological Survey of Iran, Tehran, 68 p. (in Persian)
Alavi, M. 1991: Tectonic map of the Middle East. – Geological Survey of Iran, Tehran.
Berberian, M., G.C.P. King 1981: Towards a paleogeography and tectonic evolution of Iran. – Canadian Journal of Earth Science, 18, pp. 210–265.
Bumeri, M. 2013: Rare earth minerals in Esphordi magnetite-apatite ore deposit, Bafq district. – Scientific Quarterly Journal, Geosciences, 22/85, pp. 71–82. (in Persian)
Daliran, F. 1990: The magnetite-apatite deposit of Mishdovan, east central Iran. An alkali rhyolite hosted Kiruna-type occurrence in the infra Cambrian Bafq metallotect. – PhD thesis, Univ. of Heidelberg, Geowiss. Abhandl., 37, 248 p.
Daliran, F. 1999: REE geochemistry of Bafq apatites: Implication for the genesis of Kiruna-type iron ores. – In: Stanley, C.J. et al. (Eds): Mineral Deposits: Processes to Processing. Balkema, Rotterdam, pp. 631–634.
Daliran, F. 2002: Kiruna-type iron oxide-apatite ores and apatitites of Bafq district, Iran, with an emphasis on the REE geochemistry of their apatites. – In: Porter, T.M. (Ed): Hydrothermal Iron Oxide Copper-Gold and Related Deposits. PGC Publishing, Linden Park, pp. 303–320.
Daliran, F., H.G. Stosch, P. Williams 2009: A review of the Early Cambrian Magmatic and Metasomatic events and their bearing on the genesis of the Fe oxide-REE-apatite deposits (IOA) of the Bafq District, Iran. – In: William, P.J. et al. (Eds): Smart Science for Exploration and Mining: Proceedings of the 10th Biennial SGA Meeting, Townsville, pp. 623–625.
Daliran, F., H.G. Stosch, P. Williams, H. Jamali, M.B. Dorri 2010: Early Cambrian Iron Oxide-Apatite- REE (U) Deposits of the Bafq District, East-Central Iran. – In: Corriveau, L., H. Mumin (Eds): Exploring for Iron Oxide Copper-Gold Deposits: Canada and Global Analogues. Geol. Assoc. Canada, Short Course Notes, 20, pp. 143–155.
Darvish Zadeh, A. 1983: Investigation of the phosphate in Bafq (Esphordi). – Journal of Science, University of Tehran, 28/1, pp. 2–24. (in Persian)
Forster, H.A., Jafar Zadeh 1994: The Bafq mining district in central Iran – a high mineralized infra Cambrian volcanic field. – Economic Geology, 89/8, pp. 1697–1721.
Frietsch, R., J.A. Perdahl 1995: Rare earth elements in apatite and magnetite in Kiruna-type iron ores and some other iron ore types. – Ore Geology, 9, pp. 489–510.
Haghipour, A. 1975: Etude geologique de la region de Biabanak–Bafq (Iran central): petrography et tectonique du scale Precambrian et de sa couverture. – PhD thesis, Grenoble University, 403 p.
Harlov, D.E., H.J. Forster, T.G. Nijland 2002: Fluid-induced nucleation of (Y+REE)-phosphate minerals within apatite: Nature and experiment. Part 1: Chlorapatite. – American Mineralogist, 87, pp. 245–261.
Jami, M. 2005: Geology, geochemistry and evolution of the Esphordi phosphate-iron deposit, Bafq area, Central Iran. – Unpublished PhD thesis, 403 p.
Kerr, I.D. 1998: Mineralogy, chemistry and hydrothermal evolution of the Pea Ridge Fe-oxide-REE deposit, Missouri, USA. – Unpublished MSc thesis, University Windsor, Ontario, 112 p.
Kryvdik, S., V. Mykhaylov 2001: The potential of the rare earth mineralization of Islamic republic Iran. – National Academy of Science of Ukraine, Kiev, 48 p.
Long, K.R., B.S. Van Gosen, N.K. Foley, D. Cordier 2010: The Principal Rare Earth Elements Deposits of the United States; A Summary of Domestic Deposits and a Global Perspective: USGS. Scientific Investigations Report, 2010–5220. – http://pubs.usgs.gov/sir/2010/5220, 96 p.
Mohamadi, F. 2014: Geochemistry of Azim-Abad granitoid (SW of Bahabad) and its probable role in iron-apatite mineralization. – Unpublished MSc thesis, University of Zanjan. (in Persian).
Mokhtari, M.A.A., M.H. Emami, Sh. Rahmani 2003: REE mineralization in the Bafq-Posht-e-Badam region. – 22th Geoscience Symposium, Geological Survey of Iran. (in Persian)
Mokhtari, M.A.A., M.H. Emami 2008: REE pattern and REE mineralization in apatite–magnetite deposits of Bafq-Saghand district (Central Iran). – Geosciences, Scientific Quarterly Journal, Special Issue, 17/1, pp. 162–169.
Mokhtari, M.A.A., Gh. Hossein Zadeh, M.H. Emami 2013: Genesis of iron-apatite ores in Posht-e- Badam Block (Central Iran) using REE geochemistry. – Journal of Earth System Sciences, 122/3, pp. 795–807.
NISCO 1980: Result of search and valuation works at magnetic anomalies of the Bafq iron ore region during 1976–1979. – Unpublished Report, National Iranian Steel Corporation, 260 p. (in Persian)
Parak, T. 1975: Kiruna iron ores are not intrusive magmatic ores of the Kiruna-type. – Economic Geology, 70, pp. 1242–1258.
Piccoli, P.M., P.A. Candela 2002: Apatite in igneous systems. – In: Kohn, M.J., J. Rakovan, J.M. Hughes (Eds): Phosphates (Reviews in Mineralogy and Geochemistry). Mineralogical Society of America and Geochemical Society, Washington, 48, pp. 255–292.
Rahmani, Sh., M.A.A. Mokhtari 2002: Exploration of metallic rare elements. – Geological Survey of Iran, Tehran, 365 p. (in Persian)
Ramazani, J., R.D. Tucker 2003: The Saghand region, Central Iran: U-Pb geochronology, petrogenesis and implications for Gondwana tectonics. – American Journal Science, 303, pp. 622–665.
Samani, B. 1993: Saghand formation, a riftogenic unit of upper Precambrian in central Iran. – Geosciences, Geological Survey of Iran, 6, pp. 32–45. (in Persian)
Samani, B. 1998: Precambrian metallogeny in Central Iran. – Scientific Bulletin of the Atomic Energy Organization of Iran, 17, pp. 1–16. (in Persian)
Samani, B. 1999: Rare earth element mineralization in Precambrian of Central Iran. – Scientific Bulletin of the Atomic Energy Organization of Iran, 20, pp. 15–31. (in Persian)
Samani, B., A. Babakhani 1990: Geological evolution of the Bafq-Saghand region and metallogenic model for the iron-apatite and radioactive deposits. – 9th Symposium on Geosciences, pp. 24–25. (in Persian)
Stosch, H.G., R.L. Romer, F. Daliran, D. Rhede 2011: Uranium-lead ages apatite from iron oxide ores of the Bafq District, East-Central Iran. – Mineralium Deposita, 46, pp. 9–21.
Stöcklin, J. 1968: Structural history and tectonics of Iran: A review. – American Association of Petrology and Geology Bulletin, 52, pp. 1229–1258.
Taghizadeh, N. 1976: The iron ore deposits of Iran. – In: Zitzmann, A. (Ed): The Iron Ore Deposit of Europe and Adjacent Areas; Explanatory Notes to the International Map of the Ion Ore Deposits of Europe. Bundesanstalt fur Geowissenschaften und Rohstoffe, Hannover, pp. 199–202.
Torab, F.M. 2010: Geochemistry and radio-isotope studies on the iron-apatite ores in Bafq metallogenic zone for determination of apatite origin. – Iranian Journal of Crystallography and Mineralogy, 18/3, pp. 409–418. (in Persian)
Torab F.M. , B. Lehmann 2008: Magnetite-apatite deposits of the Bafq district, Central Iran: apatite geochemistry and monazite geochronology. – Mineralogical Magazine, 71, pp. 347–363.