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Luminescence and mineralogy of profiling samples from negative archaeological features

Part of : Mediterranean archaeology & archaeometry : international journal ; Vol.13, No.3, 2013, pages 37-47
Issue:
Vol.13, No.3, 2013
Pages:
37-47
Author:
Abstract:
Ditch and pit fills from four archaeological sites in the Baixo Alentejo region of Portugal were studied to explore the relationship between Luminescence Profiling (IRSL, OSL, TSL, sensitivity and sensitization) and X-ray diffraction (XRD) analyses. Series of small (ca. 10 g) samples were collected, through the different fill materials. XRD results show that the predominant mineral is calcite (40-90%), and this exhibited the strongest relationships with luminescence behaviour. In the present sites it was often related to high absorbed doses, and so to residual signals rather than low dose rates. Commonly, the calcite content and the absorbed dose value tended to increase from the top to the bottom of a section. Layers with lower calcite content and residual luminescence signals were used to stratigraphically define different phases of accumulation. The best reset luminescence signals for dating at these sites come from the layers with the lowest calcite content. In other cases similar absorbed doses through archaeological stratigraphies, independent of composition, were interpreted to indicate that signals in the different mineral fractions were well reset prior to accumulation in the structure.
Subject:
Subject (LC):
Keywords:
luminescence, archaeology, profiling, mineralogy
References (1):
  1. Abreu, M.M., Prudêncio, M.I., Marques, M.M., Gouveia, M.A., Vieira, M.C., Cabral, J.M.P. (1990).Mineralogia e genese de formações carbonatadas superficiais no Alentejo. Actas de La IIReunioin del Cuaternario Iberico, 753-756.Araújo, A., Piçarra Almeida, J., Borrego, J., Pedro, J., Oliveira, T. (2006) As regiões centrais e sul daZona Ossa-Morena. In Geologia de Portugal no contexto da Ibéria, Eds. Sociedade Geológicade Portugal and Universidade de Évora, 151-172.Barros e Carvalhosa, A., Galopim de Carvalho, A. M. (1970) Carta Geológica de Portugal na escalade 1/50000, Lisboa, Noticia exlicativa da Folha 43-B Moura.Brindley, G.W., Brown G. (1980) Crystal structures of clay minerals and their X-ray identification. London,Mineralogical Society.Burbidge, C.I., Sanderson, D.C.W., Housley, R.A., Allsworth Jones, P. (2007) Survey of Palaeolithicsites by luminescence profiling, a case study from Eastern Europe. Quaternary Geochronology,vol. 2, 296-302.Burbidge, C.I., Rodrigues, A.L., Dias, M.I., Prudêncio, M.I., Cardoso, G. (2010) Optimization ofpreparation and measurement protocols for luminescence dating of small samples from asuite of porcelains and faiences. Mediterranean Archaeology and Archaeometry, vol. 10, 53-60.Dias, M.I. (1998) Caracterização Mineralógica e Tecnológica de Argilas Especiais de Bacias Terciárias Portuguesas.Dissertação apresentada à Universidade de Lisboa para a obtenção do grau de Doutorem Geologia, na especialidade de Geologia Económica e do Ambiente. (Policopiado)Durand, N., Gunnell, Y., Curmi, P., Ahmad, S.M. (2006) Pathways of calcrete development on weatheredsilicate rocks in Tamil Nadu, India: Mineralogy, chemistry and paleoenvironmentalimplications. Sedimentary Geology, vol. 192, 1–18.Hamel, A.M.J., Huntley, D.J. (2003) A method for quickly estimating the equivalent dose in opticaldating of K-feldspar. Ancient TL, vol. 21, 93–95.Kaplan, M.Y., Eren, M., Kadir, S., Kapur, S. (2013) Mineralogical, geochemical and isotopic characteristicsof Quaternary calcretes in the Adana region, southern Turkey: Implications on theirorigin. Catena, vol. 101, 164–177.Marques, M., Vieira, M.C., Abreu, M.M., Prudêncio, M.I., Cabral, J.M.P. (1990) The caliche of Odivelas-Serpa area of Alentejo (Portugal): An approach to their palaeoenvironmental interpretation.Chemical Geology, vol. 84, 176–178.Oliveira, J.T. (1992) SGP (Serviços Geológicos de Portugal). Carta Geológica de Portugal à escala1:200 000, Lisboa, Noticia Explicativa da Folha 8.Pais, J., Cunha, P., Pereira, D., Legoinha, P., Dias, R., Moura, D., Silveira, A., Kullberg, J., Gonzales-Delgado, J.A. (2012) The Paleogene and Neogene of Western Iberia (Portugal). Springer Briefs inEarth Sciences, Springer, Heidelberg.Pimentel, N.L.V. (2002) Pedogenic and early diagenetic processes in Palaeogene alluvial fan andlacustrine deposits from the Sado Basin (S Portugal). Sedimentary Geology, vol. 148, 123–138.Prudêncio, M.I., Dias, M.I., Waerenborgh, J.C., Ruiz, F., Trindade, M.J., Abad, M., Marques, R.,Gouveia, M.A. (2011) Rare earth and other trace and major elemental distribution in a pedogeniccalcrete profile (Slimene, NE Tunisia). Catena, vol. 87, 147–156.Sanderson, D.C.W., Bishop, P., Houston, I., Boonsener, M. (2001) Luminescence characterisation ofquartz-rich cover sands from NE Thailand. Quaternary Science Reviews, vol. 20, 893–900.Roberts, H., Durcan, J.A., Duller, G.A.T. (2009) Exploring procedures for the rapid assessment ofoptically stimulated luminescence range-finder ages. Radiation Measurements, vol. 44, 582–587.Sanderson, D.C.W., Bishop, P., Stark, M.T., Spencer, J.Q. (2003) Luminescence dating of anthropogenicallyreset canal sediments from Angkor Borei, Mekong Delta, Cambodia. QuaternaryScience Reviews, vol. 22, 1111–1121.Sanderson, D.C.W., Bishop, P., Stark, M., Alexander, S., Penny, D. (2007) Luminescence dating ofcanal sediments from Angkor Borei, Mekong Delta, Southern Cambodia. QuaternaryGeochronology, vol. 2, 322–329.Schultz, L.G. (1964) Quantitative Interpretation of Mineralogical Composition X-ray and ChemicalData for the Pierre Shale. United States Geological Survey, Professional Paper, 391-C, 1-31.Spencer, J.Q., Sanderson, D.C.W., Deckers, K., Sommerville, A.A. (2003) Assessing mixed dose distributionsin young sediments identified using small aliquots and a simple two-step SARProcedure: the F-statistic as a diagnostic tool. Radiation Measurements, vol. 37, 425–43.Valera, A. C. (2010) Gestão da morte no 3° milénio AC no Porto Torrão (Ferreira do Alentejo): umprimeiro contributo para a sua espacialidade. Apontamentos de Arqueologia e Património, vol.5, 57-62.Valera, A.C., Santos, H., Figueiredo, M., Granja, R. (2010a) Contextos funerários na periferia doPorto Torrão: Cardim 6 e Carrascal 2, Actas do 4º Colóquio de Arqueologia do Alqueva, Beja (inpress, online at https://www.academia.edu/953828/Contextos_funerarios_na_periferia_do_Porto_Torrao_Cardim_6_e_Carrascal_2, last access 18.12.2013)Valera, A.C., Godinho, R., Calvo, E., Berraquero, F. J.M., Filipe, V., Santos, H. (2010b) Um mundoem negativo: fossos, fossas e hipogeus entre o Neolítico Final e a Idade do Bronze na margemesquerda do Guadiana (Brinches, Serpa). Actas do 4º Colóquio de Arqueologia do Alqueva,Beja (in press, online at https://www.academia.edu/953825/_Um_mundo_em_negativo_fossos_fossas_e_hipogeus_entre_o_Neolitico_Final_e_a_Idade_do_Bronze_na_margem_esquerda_do_Guadiana_Brinches_Serpa, last access 18.12.2013 )