Geochemistry and genesis of rare earth minerals in the Tange Pirzal karstic bauxite deposit, Zagros Folded Belt, SW (Iran)

Document Type : Original Article

Authors

Abstract

The present study focuses on the geochemistry and genesis of REE minerals in the Tang-e Pirzal karst bauxite deposit. The deposit is located about 45 km east of Dehdasht city in the central part of the Zagros Fold Belt. The ore bodies comprise a series of contiguous lenses that occur as infills of deep karst cavities, depressions, and fractures within the upper neritic carbonates of the Cenomanian–Turonian Sarvak Formation and are structurally controlled by strike-slip fault systems. The most frequent authigenic REE minerals are fluorocarbonates of bastnäsite group that form a solid solution series between end members parisite (CaCe2(CO3)3F2) and bastnasite (CeCO3F). The formation of bastnasite-Ce and parisite-Ce suggests that cerium as fluoride and/or carbonate–fluoride complexes were simply leached by acidic downward solutions and finally precipitated on the geochemical barrier of the carbonate bedrock under alkaline and reducing conditions. Cerianite (CeO2) occurs mainly as fine grains in the porous aggregates of the cryptocrystalline matrix. Cerianite precipitation may occur due to the predominance of acidic/oxide conditions in the upper parts of the bauxite profile. Examination of the vertical distribution of the ∑REE, (La/Yb)N, Ce/Ce*, and Eu/Eu* indexes indicates progressive enrichment of the REE and slight LREE/HREE fractionation toward the lower parts of the bauxite profile. Cerium behaves differently from the other REEs and shows fluctuating behavior throughout the Tang-e Pirzal profile, which can be related to periodical fluctuations of the groundwater table in response to environmental changes.
 

Keywords

References

[1] Mongelli G., Boni M., Buccione R., Sinisi R., "Geochemistry of the Apulian karst bauxites (southern Italy): chemical fractionation and parental affinities", Ore Geology Reviews 63 (2014) 9–21.

[2] Abedini A., Calagari A.A., Hadjalilu B., "Geological-mineralogical characteristics and trace elements geochemistry in Aghadjari bauxite deposit, south of Shahindezh, NW of Iran (in Persian)", Iranian Journal of Crystallography and Mineralogy 16 (2008) 327-341.

[3] Ahmadnejad A., Zamanian H., Taghipour B., Zarasvandi A., Buccione R., Salamab Ellahi S., "Mineralogical and geochemical evolution of the Bidgol bauxite deposit, Zagros Mountain belt, Iran: Implication for ore genesis, rare earth elements fractionation and parental affinity", Ore Geology reviews 86 (2017) 755-783.

[4] Liu X., Wanga Q., Zhang Q., Zhanga Y., Li Y., "Genesis of REEminerals in the karstic bauxite in western Guangxi, China, and its constraints on the deposit formation conditions", Ore Geology Reviews 75 (2016) 100–115.

[5] Radusinović S., Jelenković R., Pačevski A., Simić V., Božović D., Holclajtner-Antunović I., Životić D., "Content and mode of occurrences of rare earth elements in the Zagrad karstic bauxite deposit (Nikšić area, Montenegro)". Ore Geology Reviews 80 (2017) 406–428.

[6] Abedini A., Mongelli G., Khosravi M., Sinisi R., "Geochemistry and secular trends in the middle–late Permian karst bauxite deposits, northwestern Iran", Ore Geology Reviews 124 (2020) 103660.

[7] Bardossy G., Panto G., Varhegyi G., "Rare metals of Hungarian bauxites and conditions of their utilization", Travaux, ICSOBA 13 (1976) 221–231.

[8] Horbe A.M.C., da Costa M.L., "Geochemical evolution of a lateritic Sn–Zr–Th–Nb–Y– REE-bearing ore body derived fromapogranite: the case of Pitinga, Amazonas-Brazil", Journal of Geochemical Exploration 66 (1999) 339–351.

[9] Li Z.H., Din J., Xu J.S., Liao C.G., Yin F.G., Lu T., Cheng L., Li J.M., "Discovery of the REE minerals in the Wulong-Nanchuan bauxite deposits, Chongqing, China: insights on conditions of formation and processes", Journal of Geochemical Exploration 133 (2013) 88–102.

[10] Reinhardt N., Proenza J.A., Villanova-de-Benavent C., Aiglsperger T., Bover-Arnal T., Torro T., Salas R., Dziggel A., "Geochemistry and mineralogy of rare earth elements (REE) in bauxitic ores of the Catalan Coastal Range, NE Spain", Minerals 8 (2018) 562.

[11] Zamanian H., Ahmadnejad F., Zarasvandi A., "Mineralogical and geochemical investigations of the Mombi bauxite deposit, Zagros Mountains, Iran", Chemie der Erde / Geochemistry 76 (2016) 13–37.

[12] Zarasvandi A., Carranza E.J.M., Ellahi S.S., "Geological, geochemical, and mineralogical characteristics of the Mandan and Deh-now bauxite deposits, Zagros Fold Belt, Iran", Ore Geology Reviews 48 (2012) 125–138.

[13] Ahmadnejad F., Zamanian H., Zarasvandi A., Shahkarami P., Sameti M., " Geochemistry and Mass Changes at the Mombi Bauxite Deposit, SW Iran (in Persian)", Iranian Journal of Crystallography and Mineralogy 25 (2017) 49-66.

[14] Alavi M., "Structures of the Zagros fold-thrust belt in Iran", American Journal of Science 307 (2007) 1064–1095.

[15] Yang Sh., Huang Y., Wang Q., Deng J., Liu X., Wang J., "Mineralogical and geochemical features of karst bauxites from Poci (western Henan, China), implications for parental affinity and bauxitization", Ore Geology Reviews 105(2019) 295–309.

[16] Kiaeshkevarian M., Calagari A.A., Abedini A., Shamanian G., "Geochemical and mineralogical features of karst bauxite deposits from the Alborz zone (Northern Iran): Implications for conditions of formation, behavior of trace and rare earth elements and parental affinity", Ore Geology Reviews 125 (2020) 103691.

[17] Mameli P., Mongelli G., Oggiano G., Dinelli E., "Geological, geochemical and mineralogical features of some bauxite deposits from Nurra (Western Sardinia, Italy): insights on conditions of formation and parental affinity", International Journal of Earth Sciences 96 (2007) 887–902.

[18] Mongelli G., Buccione R., Sinisi R., "Genesis of autochthonous and allochthonous Apulian karst bauxites (Southern Italy): climate constraints", Sedimentary Geology 325 (2015) 168–176.

[19] Mongelli G., "Ce-anomalies in the textura components of Upper Cretaceous karst bauxites from the Apulian carbonate platform (southern Italy)", Chemical Geology14 (1997) 69–79.

[20] Putzolu F., Piccolo Papa A., Mondillo N., Boni M., Balassone G., Mormone A., "Geochemical characterization of bauxite deposits from the Abruzzi Mining District (Italy)", Minerals 8 (2018) 298.

[21] Wang Q.F., Deng J., Liu X.F., Zhang Q.Z., Sun S.L., Jiang C.Z., Zhou F., "Discovery of the REE minerals and its geological significance in the Quyang bauxite deposit, West Guangxi, China", Journal of Asian Earth Sciences 39 (2010) 701–712.

[22] Ozturk H., Hein J.R., Hanilci N., "Genesis of the Dogankuzu and Mortas- Bauxite deposits, Taurides, Turkey: separation of Al, Fe, and Mn and implications for passive margin metallogeny" Economic Geology 97 (2002) 1063–1077.

[23] Sanematsu K., Moriyama T., Sotouky L., Watanabe Y., "Mobility of the rare earth elements in basalt-derived laterite at the Bolaven Plateau, Southern Laos", Resource Geology 61 (2011) 140–158.

[24] Williams-Jones A.E., Wood S.A., "A preliminary petrogenetic grid for REE fluorocarbonates and associated minerals", Geochimica et Cosmochimica Acta 56 (1992) 725–738.

[25] Karadağ M.M., Kupeli S., Aryk F., Ayhan A., Zedef V., Doyen A., "Rare earth element (REE) geochemistry and genetic implications of the Mortas bauxite deposit (Seydisehir/Konya-Southern Turkey)", Chemie der Erde / Geochemistry 69 (2009) 143–159.

[26] Deng J., Wang Q.F., Yang S.J., Liu X.F., Zhang Q.Z., Yang L.Q., Yang Y.H., "Genetic relationship between the Emeishan plume and the bauxite deposits in Western Guangxi, China: constraints from U–Pb and Lu–Hf isotopes of the detrital zircons in bauxite ores", Journal of Asian Earth Sciences 37 (2010) 412–424

[27] Braun J.J., Pagel M., Muller J.P., Bilong P., Michard A., Guillet B., "Cerium anomalies in lateritic profiles", Geochimica et Cosmochimica Acta 54 (1990) 781–795.

[28] Boynton W.V., "Cosmochemistry of the rare earth elements: meteorite studies. In: Henderson, P. (Ed.), Rare earth Element Geochemistry", Developments in Geochemistry, 2. Elsevier, Amsterdam, pp. 63–114.
Iranian Journal of Crystallography and Mineralogy
Volume 30, Issue 3 - Serial Number 87
September 2022
Pages 397-414

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History

  • Receive Date: 23 October 2021
  • Revise Date: 04 January 2022
  • Accept Date: 18 January 2022

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