MINERALOGICAL DIFFERENCES BETWEEN ANCIENT SHERDS AND EXPERIMENTAL CERAMICS: INDICES FOR FIRING CONDITIONS AND POST- BURIAL ALTERATION


Published: Jan 1, 2010
Keywords:
ancient ceramics gehlenite post-burial alteration short firing cycle
C. Rathossi
Y. Pontikes
P. Tsolis-Katagas
Abstract
Results are reported regarding laboratory-scale experimental work aiming to reproduce ceramic specimens with macro and micro characteristics similar to ancient sherds. Small differences in mineralogical composition between ancient sherds and experimental ceramics elucidated the effect of the firing conditions and the degree of post-burial alteration of ancient ceramics. Scarsity of gehlenite (Ca2Al2SiO7) in sherds for which firing temperature has been estimated between 800 to 950°C, led to higher Fs/Gh (fassaite/gehlenite) ratio in respect to that recorded for the ceramic specimens. This fact is attributed to the dissolution of gehlenite during the post-burial alteration, the ancient ceramics were subjected to, but also due to the short sintering duration (i.e. higher heating rate and/or low soaking time) applied by the potters in some cases.
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References
Bauluz, B., Mayayo, M.J., Yuste, A., Fernandez-Nieto, C., Gonzalez Lopez, J. M. 2004. TEM study of mineral
transformations in fired carbonated clays: relevance to brick making.Clay Minerals, 39, PP. 333-344.
Buxeda i Garrigós, J., Mommsen, H., Tsolakidou, A. 2002. Alterations of Na, K and Rb concentrations in
Mycenaean pottery and a proposed explanation using X-Ray Diffracrion. Archaeometry, 44, pp. 187-198.
Cultrone, G., Rodriguez-Navarro, C., Sebastian, E., Cazalla, O., De La Torre, M. J. 2001. Carbonate and
silicate phase reactions during ceramic firing. European Journal of Mineralogy, 13, (3), pp. 621-634.
Deer, W.A., Howie, R.A., Zussman, J. 1986. Rock-forming minerals, (2nd edition), v. 1B,
Disilicates and Ring Silicates. Publish by the Geological Society, pp. 285-334.
Dondi, M., Ercolani, G., Fabbri B., Marsigli, M. 1999. Chemical composition of Melilite formed during
the firing of Carbonate-rich and Iron-containing ceramic bodies. Journal of the American Ceramic Society,
, (2), pp. 465-468.
Dondi, M., Ercolani, G., Fabbri, B., Marsigli, M. 1998. An approach to the chemistry of pyroxenes formed
during the firing of Ca-rich silicate ceramics. Clay Minerals, 33, (2-3), pp. 443-452.
Doutsos, T., Kontopoulos, N., Poulimenos, G. 1988. The Corinth-Patras rift as the initial stage of continental
fragmentation behind an active island arc (Greece). Basin Research, 1, pp. 177-190.
Freidin, C., Meir, I.A. 2005. Byzantine mortars of the Negev Desert. Construction and Building Materials,
, pp. 19–23.
González-García, F., Romero-Acosta, V., García-Ramos, G., González-Rodríguez, M. 1990. Firing transformations
of mixtures of clays containing illite, kaolinite and calcium carbonate used by ornamental
tile industries. Applied Clay Science, 5, 4, pp. 361-375.
Heimann, R. B., Maggetti, M. 1981.Experiments on simulated burial of calcareous Terra Sigillata (mineralogical
change). Preliminary results, in Scientific studies in ancient ceramics (ed. M. J. Hughes),
pp. 163–77, British Museum Occasional Paper 19, London.
Hijikata, K., Okuma, K. 1969. Phase equilibria of the system CaMgSi2O6-CaFe3+AlSiO6 in air. Japan
Assoc. Miner. Petrol. And Econ. Geolog. J., 62, pp. 209-217.
Kemp, R.A. 1985. Soil Micromorphology and the Quaternary. Quartenary Research Association Technical
Guide, No 2, Cambridge.
Loftus, D.L., Tsoflias, P. 1971.Geological map of Greece, Nafpaktos sheet scale 1:50.000. Institute of
Geology and Mineral Exploration, Athens.
Maggetti, M., 1981. Composition of Roman pottery from Lousonna (Switzerland). In: Hughes, M.J. (Ed.),
Scientific Studies in Ancient Ceramic. British Museum Occasional Papers, v19, pp. 33– 49.
Maniatis, Y., Tite, M.S. 1981. Technological examination of Neolithic - Bronze Age pottery from central
and southeast Europe and from the Near East, Journal of archaeological Science, 8, pp. 59-76.
Morimoto, N. 1988. Nomenclature of pyroxenes. American Mineralogist, 73, pp. 1123-1133.
Moroni, B., Conti, C. 2006. Technological features of Renaissance pottery from Deruta (Umbria, Italy):
An experimental study. Applied Clay Science, 33, (3-4), pp. 230-246.
Noll, W. 1978. Mineralogie and Technik der bemalten Keramiken Altägyptens. Neues Jahrbuch fürMineralogie,
Abhandlungen, 133, 3, pp. 227-290.
Nomura, K., Miyamoto, M. 1995. Hydrothermal Experiments on Refractory Minerals Related to CAIs:
Implications for Aqueous Alteration in Parent Bodies. Meteoritics, 30, no 5, pp. 558.
XLIII, No 2 – 864
Nomura, K., Miyamoto, M. 1998. Hydrothermal experiments on alteration of Ca-Al-rich inclusions
(CAIs) in carbonaceous chondrites: Implication for aqueous alteration in parent asteroids. Geochimica
et Cosmochimica Acta, 62, 21/22, pp. 3575–3588.
Oba, T., Onuma, K. 1978. Preliminary report of the join CaMgSi2O6-CaFe3+AlSiO6 at low oxygen fugacity.
Journal of the Faculty of Science, Hokkaido University, 18, pp. 433-444.
Onuma, K. 1983 Effect of oxygen fugacity on fassaitic pyroxene. Journal of the Faculty of Science,
Hokkaido University, IV, (20), pp. 185-194.
Onuma, K., Akasaka, M. Yagi, K. 1981.The bearing of the system CaMgSi2O6-CaAl2SiO6-CaFeAlSiO6
on fassaitic pyroxene. LITHOS, 14, (3), pp. 173-182.
Onuma K., Yagi, K. 1975. The join CaMgSi2O6-CaAl2SiO2O6-CaFe3+AlSiO6 in air and its bearing on
fassaitic pyroxene. Journal of the Faculty of Science, Hokkaido University, IV, (16), pp. 343-356.
Owen, V., Day, T.E. 1996. Assessing and Correcting the Effects of the Chemical Weathering of Potsherds:
A Case Study Using Soft-Paste Porcelain Wasters from the Longton Hall (Staffordshire) Factory Site.
Geoarchaeology, 13, 3, pp. 265–286.
Peters, T.J., Jenny, J.P. 1973. Mineralogical study of the firing characteristics of brick clays. Beitr. Geol.
Schweitz Geotechen. 50, pp. 59, Switzerland.
Peters, T., Iberg, R. 1978. Mineralogical changes during firing of calcium-rich brick clays. Ceramic Bulletin,
, pp. 503–509.
Petropoulos, M. 1999. Roman Lamp Workshops at Patras and the Lychnomanteion. Archaeological Bulletin,
vol. 70. Ministry of Cultural Heritage, Athens, Greece.
Rathossi, C., Katagas, C., Tsolis-Katagas, P., 2003. Major and trace element characterization of Archaic
and Roman pottery from Achaia, Greece. In: Isabel Prudêncio, M., Isabel Dias, M. and Waerenborgh,
J. C., (Eds), Understanding people through their pottery, 7th European Meeting on Ancient Ceramic
(EMAC’03), pp. 217-228.
Rathossi, C., Tsolis-Katagas P., C. Katagas, C., 2004. Technology and composition of Roman pottery in
northwestern Peloponnese, Greece. Applied Clay Science, 24, (3-4), pp.313-326.
Rathossi, C., 2005. Ancient ceramics from NW Peloponnese and the provenance of their raw materials: a
petrographic, mineralogical, geochemical and archaeometric approach. PhD thesis, University of Patras.
Rathossi, C., Pontikes, Y. 2010a. Effect of firing temperature and atmosphere on ceramics made of NW
Peloponnese clay sediments. Part I: reaction paths, crystalline phases, microstructure and colour.
Journal of the European Ceramic Society (in press)
Rathossi, C., Pontikes, Y. 2010b. Effect of firing temperature and atmosphere on ceramics made of NW
Peloponnese clay sediments. Part II: chemistry of pyrometamorphic minerals and comparison with
ancient ceramics. Journal of the European Ceramic Society (in press)
Riccardi, M.P., Messiga, B., Duminuco, P. 1999. An approach to the dynamics of clay firing. Applied
Clay Science 15, pp. 393–409.
Traoré, K., Kabré, T.S., Blanchart, P. 2000. Low temperature sintering of a pottery clay from Burkina
Faso. Applied Clay Science 17, pp. 279–292.
Veniale, F. 1990. Modern techniques of analysis applied to ancient ceramics. In: Veniale, F., Zerra, U.
(Eds.), Proc. ICOMOS-CE Workshop, Advanced Workshop: Analytical Methodologies for the Investigation
of Damaged Stones, Pavia, Italy, pp. 1 –45.
Wang, J., Becker, U. 2009. Structure and carbonate orientation of vaterite (CaCO3). American Mineralogist,
, pp. 380–386.
Zelilidis, A., Koukouvelas, I., Doutsos, T. 1988. Neogene paleostress changes behind the forearc fold
belt in the Patraikos Gulf area, Western Greece. Neues Jahrbuch für Geologie und Paläonologie. Mh,
Stuttgar, pp. 311-325.
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