Document Type : Original Research Paper

Authors

School of Geology, College of Science, University of Tehran, Tehran, Iran

Abstract

       Study of source rock materials in Jajarm bauxite deposit is the main subject of this study to show its origin. From bottom to top, this deposit consists of lower argillaceous layer, argillaceous bauxite, hard bauxite and upper kaolinite units. Correlation coefficients and scatter diagrams of immobile elements in these four layers, demonstrate an early homogenous origin at the beginning of the bauxite formation. Accordingly, source materials were separated slowly due to the different conditions dominated in different parts of the deposit. Difference in drainage conditions and leaching of some elements from upper part and their re-deposition in lower parts of the deposit are the main reasons for hard bauxite separation from argillaceous one. Formation of the lower argillaceous layer, located between argillaceous bauxite and carbonate footwall is due to the direct contact of the argillaceous bauxite and carbonate footwall and also difference in drainage rate in contact area of the two layers. Geochemical evidence also depicts that upper kaolinite formation is the result of the silica leaching from upper horizons and its re-deposition in hard bauxites. Compositional comparison of studied samples with chondrite and upper continental crust demonstrates the effect of both of the basic and sedimentary rocks in evolution of the Jajarm bauxite. Formation of this deposit can be considered as a result of the alteration of the primitive laterite in an area close to the current location of the deposit. During alteration and transportation bauxite is deposited on the karstic topography and then some continental sediment was added to it.
 

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References
Balasubramaniam, K.S., Surendra, M. & Ravikumar, T.V., 1986- Genesis of certain bauxite profiles from India. Chemical Geology. 60, 227-235.
Bardossy, G., 1982- Karst Bauxites: Bauxite Deposits on Carbonate Rocks. Developments in Economic Geology, Elsevier. Vol. 14.
Bardossy, G., 1984 - European bauxite deposits. In: Leonard Jacob Jr (ed), Bauxite, Proc 1984 Bauxite Symposium, Los Angeles, California. Society of Mining Engineers, New York, pp 411± 435
Bardossy, G., Aleva, G.J.J., 1990- Lateritic Bauxite. ELSEVIER, 623p
Boynton, w.v., 1984 - Geochemistry of the rare earth elements: meteorite studies. In: Henderson P.(ed.), Rare earth element geochemistry Elsevier, 63-114.
Comer, J.B., 1974 - Genesis of Jamaica bauxite, Economic Geology. 69, 1251-1264.
Cullers, R.L., Berendsen, P., 1998- The provenance and chemical variation of sandstones associated with the Mid-continent Rift System, USA. Eur. J. Mineral. 10, 987–1002.
Cullers, R.L., Chaudhuri, S., Kilbane, N., Koch, R., 1979- Rare earths in size fractions and sedimentary rocks of Pennsylvanian-Permian age from the mid-continent of the USA. Geochim. Cosmochim. Acta 43, 1285– 1301.
Cullers, R.L., Basu, A., Suttner, L., 1988- Geochemical signature of provenance in sand-size material in soils and stream sediments near the Tobacco Root batholite, Montana, USA. Chem. Geol. 70, 335– 348.
Cullers, R.L., Graf, J., 1983- Rare earth elements in igneous rocks of the continental crust: intermediate and silicic rocks, ore petrogenesis. In: Henderson, P. (Ed.), Rare-Earth Geochemistry. Elsevier, Amsterdam. 275– 312.
Dana, J.D., 1999- Manual of mineralogy. Revised 21th edition. John Wiley and sons, 1NC.
Eliopoulos, D.G., Economou-Eliopoulos, M., 2000. Geochemical and mineralogical characteristics of Fe-Ni- and bauxitic-laterite deposits of Greece. Ore Geology Reviews 16, 41-58.
Feng, R., Kerrich, R., 1990- Geochemistry of fine-grained clastis sediments in the Archean Abititi greenstones belt, Canada: implications for provenance and tectonic setting. Geochim. Cosmochim. Acta 54, 1061– 1081.
Goldschmidt, V.M., 1937- The principles of distribution of chemical elements in minerals and rocks. J.chem. Soc. 139, 655-675.
González López, J.M., Bauluz, B., Fernandez-Nieto, C., Olite, A.Y., 2005- Factors controlling the trace element distribution in fine grained rocks: the Albian kaolinite- rich deposites of the OlieteBasin (NE Spain). Chemical geology, 214, 1-19.
Gow NN., Lozej GP., 1993- Bauxite. Geosci Can 20: 9±16 Lyew-Ayee PA (1986) A case for the volcanic origin of Jamaican bauxites. Proc Bauxite Symposium VI, 1986. J Geol Soc Jamaica 9±39.
Haskin, M.A. & Haskin L.A., 1966- Rare earths in European shales: a redetermination. Science. 154, 507-509.
Lyew-Ayee, PA., 1986- A case for the volcanic origin of Jamaican bauxites. Proc Bauxite Symposium VI, 1986. J Geol Soc Jamaica 9±39.
MacLean, W.H., Bonavia, F.F., Sanna, G., 1997- Argillite debris converted to bauxite during karst weathering: evidence from immobile element geochemistry at the Olmedo Deposit, Sardinia. Mineralium Deposita 32, 607±616.
McLennan, S.M., Nancy, W.B., Taylor, R., 1980- Rare earth element-thorium correlations in sedimentary rocks, and the composition of the continental crust. Geochim. Cosmochim. Acta 44, 1833– 1839.
McLennan, S.M., Hemming, S.R., McDaniel, D.K., Hanson, G.N., 1993- Geochemical approaches to sedimentation, provenance, and tectonics. In: Johnsson, M.J., Basu, A. (Eds.), Processes Controlling the Composition of Clastic Sediments, Spec. Pap. - Geol. Soc. Am., vol. 284, pp. 21–40.
Maksimovicَ a and Pantób, 1990- Contribution to the geochemistry of the rare earth elements in the karst-bauxite deposits of Yugoslavia and Greece. Geoderma. 51, 93-109.
Rollinson, H.R., 1993- Using geochemical data: Evaluation, Presentation, Interpretation. Longman, p. 352.
Ronov, A.B., Balashov, Y.A., Girin, Y.P., Bratishko, R.K., Kazakov, G.A., 1972- Trends in rare-earth distribution in the sedimentary shell in the earth’s crust. Geochem. Int. 9, 987–1016.
Ronov, A.B., Balashov, Y.A., Girin, Y.P., Bratishko, R.K., Kazakov, G.A., 1974 - Regularities of rare earth distribution in the sedimentary shell and in the crust of the earth. Sedimentology 21, 171– 193.
Schroll, E., Sauer D., 1964 - Ein Beitrag zur Geochemie der seltenen Elemente in Bauxiten. Symp. Bauxites, Oxydes, Hydroxides d Aluminium, 1963 Zagreb. I 201-225.
Schroll, E., Sauer, D., 1968- Beitrag zur Geochemie von Titan, Chrom, Nickel, Cobalt, Vanadium und Molibdan in bauxitischen Gesteinen und das problem der stofflichen Herkunft des Aluminiums, Travaux de l ICSOBA,Zagreb. 5, 83-96.
Taylor, G., Eggleton, T., 2004 - THE ORIGIN OF THE WEIPA BAUXITE. Regolith. 350-354.
Taylor, G.R. & Hughes, G., 1975- Biogenesis of the Rennell bauxite, Economic Geology. 70, 542-546.
Taylor, S.R., McLennan, S.M., 1981- The composition and evolution of the continental crust: rare earth element evidence from sedimentary rocks. Phil. Trans. R. Soc., A301, 381-399.
Taylor, S.R., McLennan, S.M., 1985- The Continental Crust: Its Composition and Evolution. Blackwell, Oxford. p. 312.
Valeton, I., 1966- Sur la genese des gisements de bauxite du sud-est de la France, Bulletin Societe Geologique deFrance. 7, 685-701.
Valeton, I., 1974 -Resilification at the top of the foreland bauxite in Suriname and Guyana. Miner. Deposita. 9, 169-173.
Wildeman, T.R., Condie, K.C., 1973- Rare-earths in Archean greywackes from Wyoming and from Fig Tree Group, South Africa. Geochim. Cosmochim. Acta. 37, 439– 453.
Yariv, S., Cross, H., 1979- Geochemistry of Colloidd systems. Springer Verlag, Berlin, 255 pp.