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A model for the origin of Al-rich efflorescences near fumaroles, Melos, Greece: enhanced weathering in a geothermal setting

Published online by Cambridge University Press:  05 July 2018

A. J. Hall ,
A. E. Fallick ,
V. Perdikatsis  and
E. Photos-Jones
A. J. Hall*
Affiliation:
Department of Archaeology, University of Glasgow, UK
A. E. Fallick
Affiliation:
Scottish Universities Environmental Research Centre, East Kilbride, UK
V. Perdikatsis
Affiliation:
Institute for Geological and Mining Exploration, Athens, Greece
E. Photos-Jones
Affiliation:
Department of Archaeology, University of Glasgow, UK Scottish Analytical Services for Art and Archaeology, Glasgow, UK
*
E-mail: a.hall@archaeology.arts.gla.ac.uk
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Abstract

Efflorescences in the geothermal field of SE Melos, Greece, contain significant amounts of hydrated Al sulphate, alunogen, which could represent the Melian alumen exploited in Roman times and commended by Pliny. The efflorescences at subaerial fumaroles are explained as follows: Sulphur crystallizes on oxidation of H2S emanating from depth. Weathering produces sulphuric acid enhancing groundwater alteration of volcanic rocks. The high geothermal gradient and arid climate stimulate efflorescences. Salts are recycled during wet and dry weather leading to Al-enrichment on loss of Fe(II,III) and other cations. δ34S‰ V-CDT values for sulphur in fumarole sublimates, solfatara soils and ‘veins’ range from —0.3 to 6.4‰, mean 3.8‰ (n = 8) while Al, Ca and Mg-sulphates in diverse settings range from —4.1 to 6.8‰ (n = 16). The values for sulphur indicate that the initial H2S had an igneous source and the signature is largely inherited by the sulphates.

This study aims to underpin research into the exploitation of industrial minerals in the Roman period. When searching for early alumen workings, areas with evidence of acid sulphate alteration (white rocks) and sulphurous fumarole activity should be investigated.

Keywords

MelosMilosalumenPlinyfumarolealunogenefflorescencesulphur isotopes.
Type
Research Article
Information
Mineralogical Magazine , Volume 67 , Issue 2 , April 2003 , pp. 363 - 379
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2003

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References

Bailey, K.C. (1932) The elder Pliny's chapters on chemical subjects. Part II. London.Google Scholar
Bethke, C.M. (1996) Geochemical Reaction Modeling: Concepts and Applications. Oxford University Press. New York.CrossRefGoogle Scholar
Botz, R., Stuben, D., Winckler, G., Bayer, R., Schmitt, M. and Faber, E. (1996) Hydrothermal gases offshore Milos Island, Greece. Chemical Geology, 130. 161—173.CrossRefGoogle Scholar
Cherry, J.F. and Torrence, R. (1982) The earliest prehistory of Melos. Pp 22—34 in: An Island Polity: the Archaeology of Exploitation in Melos. (Renfrew, C. and Wagstaff, J.M., editors). Cambridge.Google Scholar
Claypool, C.E., Holser, W.T., Sakai, L.R. and Zak, I. (1980) The age curves for sulfur and oxygen isotopes in marine sulfate and their mutual interpretation. Chemical Geology, 28, 199—260.CrossRefGoogle Scholar
Coleman, M.L. and Moore, M.P. (1978) Direct reduction of sulphates to sulphur dioxide for isotopic analyses. Analytical Chemistry, 50, 1595—1595.CrossRefGoogle Scholar
Fytikas, M. (1977) Geological map of Greece: Melos Island, IGME, Athens.Google Scholar
Fytikas, M. (1989) Updating of the geological and geothermal research on Milos Island. Geothermics, 18, 485—496.CrossRefGoogle Scholar
Fytikas, M., Innocenti, F., Manetti, P., Mazzuoli, R., Peccerillo, A. and Villari, L. (1984) Tertiary to Quaternary evolution of volcanism in the Aegean region. Pp 687—699 in: The Geological Evolution of the Eastern Mediterranean. (Dixon, J.E. and Robertson, A.H.F., editors). Geological Society of London. Blackwell Scientific. London.Google Scholar
Hall, A.J., Photos-Jones, E., McNulty, A., Turner, D. and McRobb, A. (in press) Geothermal activity at the archaeological site of Aghia Kyriaki and its significance to Roman industrial mineral exploitation on Melos, Greece. Geoarchaeology.Google Scholar
Hatjilazaridou, K., Chalkiopoulou, F. and Grossou-valta, M. (1998) Greek industrial minerals: Current status and trends. Industrial Minerals , June, 45—63.Google Scholar
Hauk, M. (1983) The barite deposits on the islands of Milos (Aegean Sea), Greece. Fortschritte der Mineralogie, 61, 81—82.Google Scholar
Hein, J.R., Stamatakis, M.G. and Dowling, J.S. (2000) Trace metal-rich Quaternary hydrothermal manganese oxide and barite deposit, Milos Island, Greece. Transactions of the Institution of Mining and Metallaurgy (Section B: Applied Earth Science) , 109, B67–B76.Google Scholar
Hubberten, H.W., Nielsen, H. and Puchelt, H. (1975) The enrichment of 34S in the solfataras of the Nea Kameni volcano, Santorini archipelago, Greece. Chemical Geology, 16, 197—205.CrossRefGoogle Scholar
Kalogeropoulos, S.I. and Mitropoulos, P. (1983) Geochemistry of barites from Milos island (Aegean Sea) Greece. Neues Jahrbuch fur Mineralogie Monatshefte , H.1, 13—21.Google Scholar
Kelepertsis, A.E. (1989) Formation of sulfates at the Thiaphes area of Milos Island: possible precursors of kaolinite mineralization. The Canadian Mineralogist, 27, 241—245.Google Scholar
Kilias, S.P., Naden, J., Cheliotis, I., Shepherd, T.J., Constandinidou, H., Crossing, J. and Simos, I. (2001) Epithermal gold mineralisation in the active Aegean Volcanic arc: the Profitis Ilias deposit, Milos Island, Greece. Mineralium Deposita, 36, 32—44.CrossRefGoogle Scholar
Liakopoulos, A. and Boulegue, J. (1987) A geochemical model for the origin of geothermal fluids and the genesis of mineral deposits in Milos island. Terra Cognita, 7, 228.Google Scholar
Liakopoulos, A., Katerinopoulos, A., Markopoulos, T. and Boulegue, J. (1991) A mineralogical, petrographic and geochemical study of samples from wells in the geothermal field of Milos Island (Greece). Geothermics, 20, 237—256.CrossRefGoogle Scholar
Martin, R., Rodgers, K.A. and Browne, P.R.L. (1999) The nature and significance of sulphate-rich, aluminous efflorescences from the Te Kopia geothermal field, Taupo Volcanic Zone, New Zealand. Mineralogical Magazine, 63, 413—419.CrossRefGoogle Scholar
McNulty, A.E. (2000) Industrial Minerals in Antiquity: Melos in the Classical and Roman Periods. Unpubulished PhD thesis, Department of Archaeology and Division of Earth Sciences, University of Glasgow, UK, 344 pp.Google Scholar
Millard, A.R. (1999) Geochemistry and the early alum industry. Pp. 139—146 in: Geoarchaeology: Exploration, Environments, Resources (Pollard, A.M., editor). Special Publication 165. Geological Society, London.Google Scholar
Nordstrom, D.K. (1982) The effect of sulfate on aluminium concentrations in natural waters: some stability relations in the system Al2O3-SO3-H2O at 298°K. Geochimica et Cosmochimica Acta, 46, 681—92.CrossRefGoogle Scholar
Perdikatsis, V. & Psycharis, V. (2001) X-ray powder diffraction of mineralogical samples by X-ray Goebel Mirrors. Bulletin of the Geological Society of Greece , XXXIV/3, 883—890.CrossRefGoogle Scholar
Pharmaceutical Society of Great Britain (1979) The Pharmaceutical Codex. 11th Ed. The Pharmaceutical Press, London.Google Scholar
Photos-Jones, E., Hall, A.J., Atkinson, J.A., Tompsett, G., Cottier, A. and Sanders, G.D.R. (1999) The Aghia Kyriaki, Melos survey: Prospecting for the elusive earths in the Roman period in the Aegean. Annual of the British School at Athens, 94, 377—413.CrossRefGoogle Scholar
Pittinger, J. (1975) The mineral products of Melos in antiquity and their identification. Annual of the British School at Athens, 70, 191—197.CrossRefGoogle Scholar
Plimer, I. and Petrou, N. (2000) Milos: Geologic History. Koan, Athens, 263 pp.Google Scholar
Robertson, A.H.F. and Dixon, J.E. (1984) Introduction: aspects of the geological evolution of the Eastern Mediterranean. Pp. 1—74 in: The Geological Evolution of the Eastern Mediterranean (Dixon, J.E. and Robertson, A.H.F., editors). Geological Society of London, Blackwell Scientific.Google Scholar
Robinson, B.W. and Kusakabe, M. (1975) Quantitative preparation of sulphur dioxide for 34S/32S analyses from sulphides by combustion with cuprous oxide. Analytical Chemistry, 47, 1179—1181.CrossRefGoogle Scholar
Rodgers, K.A., Hamlin, K.A., Browne, P.R.L., Campbell, K.A. and Martin, R. (2000) The steam condensate alteration mineralogy of Ruatapu cave, Orakei Korako geothermal field, Taupo Volcanic Zone, New Zealand. Mineralogical Magazine, 64, 125—142.CrossRefGoogle Scholar
Shelford, P. (1982) The Geology of Melos. Pp. 74—81 and appendix B in: An Island Polity: the Archaeology of Exploitation in Melos (Renfrew, C. and Wagstaff, J.M., editors). Cambridge.Google Scholar
Singer, C. (1948) The Earliest Chemical Industry: An essay in the historical relations of economics & technology illustrated from the alum trade. The Folio Society, London, 337 pp.Google Scholar
So, C.-S., Yun, S.-T. and Park, M.-E. (1995) Geochemistry of a fossil hydrothermal system at Barton Peninsula, King George Island, Antarctic. Science, 7, 63—72.Google Scholar
Stamatakis, M.G., Lutat, U., Regueiro, M. and Calvo, J.P. (1996) Milos: the mineral island. Industrial Minerals , Feb., 57—61.Google Scholar
Stoiber, R.E. and Rose, W.I. (1974) Fumarole incrustations at active Central American volcanoes. Geochimica et Cosmochimica Acta, 38, 495—516.CrossRefGoogle Scholar
Thompson, M. and Walsh, J.N. (1989) Handbook of Inductively Coupled Plasma Spectrometry. 2nd edition. Blackie, London, 316 pp.CrossRefGoogle Scholar