Hall, A.J., Fallick, A.E., Perdikatsis, V. and Photos-Jones, E. (2003) A model for the origin of AI-rich efflorescences near fumaroles, Melos, Greece: enhanced weathering in a geothermal setting. Mineralogical Magazine, 67(2), pp. 363-379. (doi: 10.1180/0026461036720102)
Full text not currently available from Enlighten.
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 H S 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. delta(34)Sparts per thousand V-CDT values for sulphur in fumarole sublimates, solfatara soils and 'veins' range from -0.3 to 6.4parts per thousand, mean 3.8parts per thousand (n = 8) while Al, Ca arid Mg-sulphates in diverse settings range from -4.1 to 6.8parts per thousand (n = 16). The values for sulphur indicate that the initial H2S had an igneous source and the signature is largely inherited by the sulphates.<p></p> 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.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hall, Dr Allan and Fallick, Professor Anthony and Photos-Jones, Dr Effie |
| Authors: | Hall, A.J., Fallick, A.E., Perdikatsis, V., and Photos-Jones, E. |
| Subjects: | Q Science > QE Geology |
| College/School: | College of Science and Engineering > Scottish Universities Environmental Research Centre College of Arts & Humanities > School of Humanities > Archaeology |
| Journal Name: | Mineralogical Magazine |
| Publisher: | Mineralogical Society |
| ISSN: | 0026-461X |
| ISSN (Online): | 1471-8022 |
| Published Online: | 01 April 2003 |
University Staff: Request a correction | Enlighten Editors: Update this record
Funder and Project Information
Funder and Project Information