The Roman amphitheatre in Mérida, Spain ˗Augustan or Flavian: Radiocarbon dating results on mortar carbonate

Alf Lindroos; Jan Heinemeier; Åsa Ringbom; Thomas Schrøder Daugbjerg; Irka Hajdas

doi:10.2478/geochr-2020-0028

The Roman amphitheatre in Mérida, Spain ˗Augustan or Flavian: Radiocarbon dating results on mortar carbonate

Alf Lindroos, Jan Heinemeier, Åsa Ringbom, Thomas Schrøder Daugbjerg^*, Irka Hajdas

^*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

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Abstract

Four lime mortar samples from the Mérida amphitheatre in Spain were dated in 2001 and re-dated in 2019 with refined dating methods and focus on carbon dioxide that was released in late CO2 fractions when dissolved in phosphoric acid. The samples were difficult to date because they contained highly soluble, young carbonate contamination that dominated the carbon dioxide from the early stages of the reaction with the acid in the hydrolysis process. They were also rather hydraulic and rich in magnesium, which could have caused delayed hardening. However, there was very little dead carbon contamination so that late carbon dioxide fraction gave uniform 14C ages, pointing to a late 1st c. AD Flavian, or later age of the amphitheatre.

Originalsprog	Engelsk
Tidsskrift	Geochronometria
Vol/bind	47
Nummer	1
Sider (fra-til)	187-195
Antal sider	9
ISSN	1733-8387
DOI	https://doi.org/10.2478/geochr-2020-0028
Status	Udgivet - 2021

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10.2478/geochr-2020-0028Licens: CC BY-NC-ND

10.2478_geochr-2020-0028Forlagets udgivne version, 2,53 MBLicens: CC BY-NC-ND

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abstract = "Four lime mortar samples from the M{\'e}rida amphitheatre in Spain were dated in 2001 and re-dated in 2019 with refined dating methods and focus on carbon dioxide that was released in late CO2 fractions when dissolved in phosphoric acid. The samples were difficult to date because they contained highly soluble, young carbonate contamination that dominated the carbon dioxide from the early stages of the reaction with the acid in the hydrolysis process. They were also rather hydraulic and rich in magnesium, which could have caused delayed hardening. However, there was very little dead carbon contamination so that late carbon dioxide fraction gave uniform 14C ages, pointing to a late 1st c. AD Flavian, or later age of the amphitheatre.",

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author = "Alf Lindroos and Jan Heinemeier and {\AA}sa Ringbom and Daugbjerg, {Thomas Schr{\o}der} and Irka Hajdas",

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AU - Ringbom, Åsa

AU - Daugbjerg, Thomas Schrøder

AU - Hajdas, Irka

PY - 2021

Y1 - 2021

N2 - Four lime mortar samples from the Mérida amphitheatre in Spain were dated in 2001 and re-dated in 2019 with refined dating methods and focus on carbon dioxide that was released in late CO2 fractions when dissolved in phosphoric acid. The samples were difficult to date because they contained highly soluble, young carbonate contamination that dominated the carbon dioxide from the early stages of the reaction with the acid in the hydrolysis process. They were also rather hydraulic and rich in magnesium, which could have caused delayed hardening. However, there was very little dead carbon contamination so that late carbon dioxide fraction gave uniform 14C ages, pointing to a late 1st c. AD Flavian, or later age of the amphitheatre.

AB - Four lime mortar samples from the Mérida amphitheatre in Spain were dated in 2001 and re-dated in 2019 with refined dating methods and focus on carbon dioxide that was released in late CO2 fractions when dissolved in phosphoric acid. The samples were difficult to date because they contained highly soluble, young carbonate contamination that dominated the carbon dioxide from the early stages of the reaction with the acid in the hydrolysis process. They were also rather hydraulic and rich in magnesium, which could have caused delayed hardening. However, there was very little dead carbon contamination so that late carbon dioxide fraction gave uniform 14C ages, pointing to a late 1st c. AD Flavian, or later age of the amphitheatre.

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KW - sequential dissolution

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DO - 10.2478/geochr-2020-0028

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JO - Geochronometria

JF - Geochronometria

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ER -

The Roman amphitheatre in Mérida, Spain ˗Augustan or Flavian: Radiocarbon dating results on mortar carbonate

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