Studies of normative mineralogy and rare earth elements geochemistry of the Gazanjeh bauxite deposit, southeast of Mahabad, NW Iran

Authors

Abstract

The Gazanjeh bauxite deposit (SE Mahabad, West-Azarbaidjan province) is a typical residual sedimentary deposit with dolomitic limestone host rock of Permian age in northwestern Iran. Calculations of normative values of minerals using obtained results from XRD and XRF analyses in a selected profile indicate that diaspore, hematite, and pyrophyllite were major mineralogical phases of this deposit and include 71.73 to 94.66 % of mineralogical composition of ores, approximately. Based on normative values of minerals, this deposit was formed from two-type ores, (1) clayey bauxite and (2) iron-rich bauxite. Based upon chemical analyses, REE values vary in the ores from 30.14 to 379.55 ppm. Values of La/Y, Eu/Eu*, and Ce/Ce* in the ores are within the ranges of 0.33-3.16, 0.57-1.36, and 0.87-7.05, respectively.  Combination of the obtained results from investigation of trend of lanthanides changes and elemental ratios in the selected profile suggest that factors such as change in physico-chemical conditions of depositional environment (pH and Eh), fluctuations in level of groundwaters table, degree of complexation with carbonatic lighands, difference in the stability of lanthanides-bearing minerals, and mineral control have played the important role in distribution and mobilization of REEs during formation and development of the studied bauxitic ores.   

Keywords


[1] Voicu G., Bardoux M., Voicu D., "Mineralogical norm calculations applied to tropical weathering profiles", Mineralogical Magazine 61 (1997) 185-196.

[2] Nyobe J. B., "Application of normative calculations in quantitative comparative mineralogical studies of bauxite", Ore Geology Reviews 6 (1991) 45-50.

[3] Bardossy G. Y., Aleva G. Y. Y., "Lateritic bauxites", Akademia, Kiado Budapest (1990) 1-646.

[4] Butt C. R. M., Zeegers H., "Regolith exploration geochemistry in tropical and subtropical terrains", Handbook of Exploration Geochemistry, Elsevier, Amsterdam (1992) 1-607.

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

[6] Abedini A., Calagari A. A.,"REE geochemical characteristics of titanium-rich bauxites: the Permian Kanigorgeh horizon, NW Iran", Turkish Journal of Earth Sciences 23 (2014) 513-532.

[7] Liu X., Wang Q., Zhang Q., Zhang Y., Li Y., "Genesis of REE minerals in the karstic bauxite in western Guangxi, China, and its constraints on the deposit formation conditions", Ore Geology Reviews 75 (2016) 100-115.

[8] 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.

[9] Wang X., Jiao Y., Du Y., Ling W., Wu L., Cui T., Zhou Q., Jin Z., Lei Z., Weng S., "REE mobility and Ce anomaly in bauxite deposit of WZD area, Northern Guizhou, China", Journal of Geochemical Exploration 133 (2013) 103-117.

[10] Abedini A., Calagari A. A.," Mobilization and redistribution of major and trace elements in a lateritic profile: the Sheikh-Marut deposit, NW Iran", Arabian Journal of Geosciences 8 (2015) 10871-10882.

[11] Abedini A., Calagari A. A.,"Petrography, and mineralogical and geochemical control on distribution of major, minor, and trace elements in bauxitic-lateritic deposit of the NE Malekan, East-Azarbaidjan province, NW Iran", Iranian Journal of Crystallography and Mineralogy 20 (2013) 89-100.

[12] Abedini A., Calagari A. A.,"The mineralogy and geochemistry of Permian lateritic ores in east of Shahindezh, West-Azarbaidjan province", Iranian Journal of Crystallography and Mineralogy 20 (2012) 59-72.

]13[ نبوی م.ح.،" دیباچه‌ای بر زمین‌شناسی ایران"، انتشارات سازمان زمین‌شناسی و اکتشافات معدنی کشور، (1355) ص 1-109.

]14[ افتخارنژاد ج.، " نقشه زمین‌شناسی 1:250000 مهاباد"، انتشارات سازمان زمین‌شناسی و اکتشافات معدنی کشور (1355).

[15] Taylor Y., McLennan S. M., "The continental crust: Its composition and evolution", 1st ed. Oxford, UK: Blackwell.

[16] Braun J. J., Viers J., Dupre M., Ndam J., Muller J. J., "Solid liquid REE fractionation in the lateritic system of Goyoum, East Cameroon: The implication for the present dynamics of the soil covers of the humid tropical regions", Geochimica et Cosmochimica Acta 62 (1998) 273-299.

[17] Rudnick R. L., Gao S., "Composition of the continental crust", In: Holland H, Turekian K, editors. Treatise on Geochemistry. 2nd ed. Amsterdam, the Netherlands: Elsevier (2004) 1-64.

[18] Beyala V. K. K., Onana V. L., Priso E. N. E., Parisot J., Ekodeck G. E., "Behaviour of REE and mass balance calculations in a lateritic profile over chlorite schists in South Cameroon", Chemie der Erde-Geochemistry 69 (2009) 61-73.

[19] Crinci J., Jurkowic I., "Rare earth elements in Triassic bauxites of Croatia Yugoslavia", Travaux 19 (1990) 239-248.

[20] Cantrell K. J., Byrne R. H., "Rare earth element complexation by carbonate and oxalate ions", Geochimica et Cosmochimica Acta 51 (1987) 597-605.