Abstract
A common practice in archaeomagnetic studies in many laboratories is the impregnation of the material with water glass (siliceous gel) in order to achieve better consolidation before cutting. The purpose of this study is to establish if and how the presence of water glass in the burnt clay material affects its magnetic properties during heating. We describe experiments designed to monitor the alterations in isothermal remanence and magnetic susceptibility for two sets of specimens - non-impregnated and impregnated with water glass. Our results show that water glass can cause considerable changes in magnetic susceptibility, but the remanent magnetization is not influenced significantly.
References
Barbetti M. and McElhinny M., 1996. The Lake Mungo geomagnetic excursion. Philos. Trans. R.S. London, A. Math. And Phys. Sci., 281, 515-542.
Dekkers M., 1990. Magnetic properties of natural goethite-III. Magnetic behavior and properties of minerals originating from goethite dehydration during thermal demagnetization. Geophys. J. Int., 103, 233-250.
Jordanova N., Petrovský E. and Kovacheva M., 1997. Preliminary rock-magnetic study of archaeomagnetic samples from Bulgarian prehistoric sites. J. Geomag. Geoelectr., 49, 543-566.
Kovacheva M. and Toshkov A., 1994. Geomagnetic field variations as determined from Bulgarian archaeomagnetic data. Part I: the last 2000 years AD. Surv. Geophys., 19, 413-460.
Kovacheva M. and Jordanova N., 2001. Bulgarian archaeomagnetic studies: a review of methodological progress and applications in archaeology. J. Radioanalyt. Nucl. Chem., 247, 685-696.
Murad E. and Wagner U., 1998. Clays and clay minerals: the firing process. Hyperfine Interact., 117, 337-356.
Wagner U., Gebhard R., Grosse G., Hutzelmann T., Murad E., Riederer J., Shimada I. and Wagner F.E., 1998. Clay: An important raw material for prehistoric man. Hyperfine Interact., 117, 323-335.
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Kostadinova, M., Jordanova, N., Jordanova, D. et al. Preliminary Study on the Effect of Water Glass Impregnation on the Rock-Magnetic Properties of Baked Clay. Studia Geophysica et Geodaetica 48, 637–646 (2004). https://doi.org/10.1023/B:SGEG.0000037475.67953.9b
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DOI: https://doi.org/10.1023/B:SGEG.0000037475.67953.9b