Document Type : Original Research Paper


1 Department of Geology, Bu-Ali Sina University, Hamedan, Iran

2 International Center of Sciences, High Technology and Environmental Sciences, Kerman, Iran


Mineralogy of clay deposits named Gel-E-Sarshour, mainly mined in CentralProvince, Tafresh area, has been studied. This material is mined from Oligocene Lower Red Formation in wells up to 30 m depth. Clay layers have different thicknesses from 1 cm to 2 m in different parts. It comes in olive green and has a soapy touch. The clay will change to paste if mixed with water and used mainly as shampoo as well as treatment for some of the skin diseases. Grain size analysis has shown that  92.3% of the material is <2μ. XRD, IR and chemical analysis have established that the main constituents of < 2μ fractions of Gel-E-Sarshour are: 91 % high layer charge, dioctahedral mixed-layered illite/smectite and 9 % kaolinite.


Adriano, D. C. ,1986 - Trace Elements in the Terrestrial Environment. Springer-Verlag, New York.
Bergaya, F., Vayer, M.,1997- CEC of clays: measurement by adsorption of a copper ethylenediamine complex, Applied Clay Science, 12, 275-280.
Geological Survey of Iran, Geological Map of the Tafresh area, Iran ,1977.
Jackson, M. L., 1979- Soil Chemical Analysis-Advanced course (2nd edn), Published by author.
Mahjoory, R. A.,1996-Occurrence and mineralogy of a deposit of shampoo-clay in southern Iran,Applied Clay Science,11,      69-76.
Moore, D. M., Reynolds, R. C., 1989- X-Ray Diffraction and the Identification and Analysis of Clay Minerals, OxfordUniversity Press, New York.
Ross, C. S., Hendricks, S. B., 1945- Minerals of the montmorillonite group,U.S. Geol. Survey Professional Paper, 205-B, 23-79.
Russell, J. D. & Fraser, A. R., Infrared method. In: Wilson , M. J. (Ed.), 1994 - Clay Mineralogy: Spectroscopic and Chemical Determinative Methods, Chapman & Hall, London.
Środoń, J., 1980- Precise identification of illite/smectiti interstratifications by X-ray powder diffraction, Clay and Clay Minerals, 28,401-411.
Weir, A. H., Ormerod, E. C. and E1-Mansey, M. I. ,1975- Clay mineralogy of sediments of the western Nile Delta, Clay Miner., 10 , 369-386.