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Raw Material Sources for the Roman Bracarense Ceramics (NW Iberian Peninsula)

Published online by Cambridge University Press:  01 January 2024

M. Isabel Prudêncio ,
M. Amália Sequeira Braga ,
Felisbela Oliveira ,
M. Isabel Dias ,
Manuela Delgado  and
Manuela Martins
M. Isabel Prudêncio
Affiliation:
Instituto Tecnológico e Nuclear, EN 10, 2686-953 Sacavém, Portugal
M. Amália Sequeira Braga
Affiliation:
Centro de Investigação Geológica, Ordenamento e Valorização de Recursos (CIG-R), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
Felisbela Oliveira
Affiliation:
Gabinete de Arqueologia, Câmara Municipal, 4760-110 V. N. Famalicão, Portugal
M. Isabel Dias*
Affiliation:
Instituto Tecnológico e Nuclear, EN 10, 2686-953 Sacavém, Portugal
Manuela Delgado
Affiliation:
Unidade de Arqueologia, Universidade do Minho, 4700-320 Braga, Portugal
Manuela Martins
Affiliation:
Unidade de Arqueologia, Universidade do Minho, 4700-320 Braga, Portugal
*
*E-mail address of corresponding author: isadias@itn.mcies.pt
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Abstract

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The Bracarense ceramics are characterized by a fine, pale yellow paste covered with a brownish yellow slip. The name is derived from Bracara Augusta, the Roman town located in the north of Portugal, where this type of ceramic paste was first found and identified. Various forms with the same type of paste occur, such as imitations of sigillata, terra sigillata and thin walls from the Augustus-Tiberius period, and common ware. Later, similar ceramics were also found in other archeological sites, e.g. Aquis Querquennis (Galiza, Spain), which question the location of the production center of this type of ceramic paste.

Mineralogical and chemical analyses showed that the majority of the Bracarense shards studied differ from the common ware of the Braga region. Despite minor differences, the Bracarense shards collected in Aquis Querquennis have the same geochemical pattern as those found in Bracara Augusta, i.e. they appear to have been manufactured with the same clay type. The firing products found indicate a kaolin character of the source clay, and point to firing temperatures near 900°C. The Aquis Querquennis shards have greater Br contents, which can be explained by use-wear and/or post-depositional processes, as this site is located in a thermal-water region.

Keywords

Archeological CeramicsClaysINAAMineral TransformationMulliteProduction TechnologySEM-EDSSpinelTrace ElementsXRD
Type
Research Article
Information
Clays and Clay Minerals , Volume 54 , Issue 5 , October 2006 , pp. 638 - 649
Copyright
Copyright © 2006, The Clay Minerals Society

References

Alarcão, A.M. and Martins, A.N., (1976) Uma cerâmica aparentada com as ‘Paredes Finas’ de Mérida Conimbriga XV 91–109 Coimbra.CrossRefGoogle Scholar
Bates, T.F. and Gard, J.A., (1971) The kaolin minerals The Electron-Optical Investigation of Clays London Mineralogical Society 109–157.CrossRefGoogle Scholar
Baumgart, W. Dunham, A.C. and Amstutz, G.C., (1984) Process Mineralogy of Ceramic Materials Stuttgart, Germany Ferdinand Enke Publishers.Google Scholar
Brown, G., Brindley, G.W. and Brown, G., (1980) Associated Minerals Crystal Structures of Clay Minerals and their X-ray Identification London Mineralogical Society 361–410.CrossRefGoogle Scholar
Brown, G. Brindley, G.W., Brindley, G.W. and Brown, G., (1980) X-ray diffraction procedures for clay mineral identification Crystal Structures of Clay Minerals and their X-ray Identification London Mineralogical Society 305–360.CrossRefGoogle Scholar
Carty, W.M. and Senapti, U., (1998) Porcelain — raw materials, processing phase evolution, and mechanical behavior Journal of the American Ceramic Society 81 3–20 10.1111/j.1151-2916.1998.tb02290.x.CrossRefGoogle Scholar
Ferreira, N. Dias, G. Meireles, C. and Sequeira Braga, M.A., (2000) Carta Geológica de Portugal na escala 1/50 000 Notícia Explicativa da Folha 5-D, Braga 2 Lisboa IGM 68 pp.Google Scholar
Gaspar, A., (2000) Contribuição para o estudo de cerâmicas dos séc. V–VI DC de Braga Portugal Universidade do Minho 93 pp.Google Scholar
Gomes, A., (2000) Cerâmicas pintadas da época romana: tecnologia, tipologia e cronologia Portugal Universidade do Minho 93 pp.Google Scholar
Gomes, C., (1988) Argilas. O que sâo e para que servem Lisboa Fundação Calouste Gulbenkian 457 pp.Google Scholar
Gouveia, M.A. Prudêncio, M.I. Freitas, M.C. Martinho, E. and Cabral, J.M.P., (1987) Interference from uranium fission products in the determination of rare earths, zirconium and ruthenium by instrumental neutron activation analysis in rocks and minerals Journal of Radioanalytical and Nuclear Chemistry 114 309–318 10.1007/BF02039805 Articles.CrossRefGoogle Scholar
Govindaraju, K., (1994) Compilation of working values and sample description for 383 geostandards Geostandards Newsletter 18 1–7 10.1111/j.1751-908X.1994.tb00502.x.CrossRefGoogle Scholar
Hervés Raigoso, F.M., (1989) Escavacion arqueolóxica do campamento Romano de ‘Aquis Querquennis’ (Bande, Ourense) Arqueoloxía. Informes 3 Xunta de Galicia Campaña 1989 45–49.Google Scholar
ITGE, Mapa geológico de España. Escala 1:200 000 Hoja no 17/27 (1989) Madrid Ourense/Verin 284 pp.Google Scholar
Martinho, E. Gouveia, M.A. Prudêncio, M.I. Reis, M.F. and Cabral, J.M.P., (1991) Factor for correcting the ruthenium interference in instrumental neutron activation analysis of barium in uraniferous samples Applied Radiations and Isotopes 42 1067–1071 10.1016/0883-2889(91)90012-P.CrossRefGoogle ScholarPubMed
Martins, M. and Delgado, M., (1989) As necrópoles de Bracara Augusta: os achados arqueológicos Cadernos de Arqueologia II 6/7 41–186 90a.Google Scholar
Martins, M. and Delgado, M., (1989) História e Arqueologia de uma cidade em devir: Bracara Augusta Cadernos de Arqueologia II 6/7 11–38 90b.Google Scholar
Martins, M. and Delgado, M. (1995) Bracara Augusta: Uma cidade na periferia do império. Actas do Colóquio Internacional de Arqueologia ‘Los finisterres Atlânticos en la Antiguedad (época preromana y romana)’. Gijón, pp. 121–128.Google Scholar
Oliveira, F., (1997) Contribuição para o estudo da cerâmica fina de Braga. A cerâmica ‘dita Bracarense’ Portugal Universidade do Minho 93 pp.Google Scholar
Oliveira, F. Sequeira Braga, M.A. Prudêncio, M.I. Delgado, M. Gouveia, M.A., Prudêncio, M.I. Dias, M.I. and Waerenborgh, J.J., (2005) The non vitrifiable red slip ware found in Braga (Northwest Portugal). A mineralogical and chemical understanding Understanding People through their Pottery Lisboa Trabalhos de Arquelogia, Série Monográfica, IPA 80–89.Google Scholar
Prudêncio, M.I. Gouveia, M.A. and Cabral, J.M.P., (1986) Instrumental neutron activation analysis of two French geochemical reference samples — Basalt BR and Biotite Mica-Fe Geostandards Newsletter X 29–31 10.1111/j.1751-908X.1986.tb00805.x.CrossRefGoogle Scholar
Prudêncio, M.I. Gouveia, M.A. and Cabral, J.M.P., (1988) Instrumental neutron activation analysis of NBS-97a Flint Clay and NBS-98a Plastic Clay reference samples with a view to their use as standards for archeological studies and clay studies Journal of Trace and Microprobe Techniques 6 103–111.Google Scholar
Prudêncio, M.I., Cabral, J.M.P. and Tavares, A. (1989) Identification of clay sources used for Conímbriga and Santa Olaia pottery making. Proceedings of the 1986 Archaeometry Symposium (Maniatis, Y., editor), 503–514.Google Scholar
Rice, P.M., (1987) Pottery Analysis, A Sourcebook Chicago and London The University of Chicago Press 559 pp.Google Scholar
Rodriguez Colmenero, A., (1983) El campamento romanao de ‘Aquis Querquennis’ Actas del II Seminario de Arqueología del Noroeste Santiago de Compostela, Madrid Ministerio de Cultura.Google Scholar
Sequeira Braga, M.A., (1988) Arenas e depósitos associados da bacia de drenagem do rio Cávado (Portugal) — Contribuição para o estudo da arenização Portugal Universidade do Minho 325 pp.Google Scholar
Sequeira Braga, M.A. Paquet, H. and Begonha, A., (2002) Weathering of granites in a temperate climate (NW Portugal): granitic saprolites and arenization Catena 49 41–56 10.1016/S0341-8162(02)00017-6.CrossRefGoogle Scholar
Sinha, M.K. and Guha, S.K., (1992) Mineralogical studies on five plastic fire clays — DTA, TG and electron microscopy Journal of Thermal Analysis 38 1405–1413 10.1007/BF01975074.CrossRefGoogle Scholar
StatSoft, I.n.c.. (2003) () STATISTICA (data analysis software system), version 6. .Google Scholar
Velde, B. and Druc, I.C., (1999) Archaeological Ceramic Materials. Origin and utilization Berlin, Heidelberg Springer-Verlag 10.1007/978-3-642-59905-7 299 pp.CrossRefGoogle Scholar