Successful ams 14C dating of non-hydraulic lime mortars from the medieval churches of the Åland Islands, Finland

Jan Heinemeier*, Åsa Ringbom, Alf Lindroos, Árný E. Sveinbjörnsdóttir

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

58 Sitaatiot (Scopus)

Abstrakti

Fifteen years of research on accelerator mass spectrometry (AMS) radiocarbon dating of non-hydraulic mortar has now led to the establishment of a chronology for the medieval stone churches of the A °land Islands (Finland), where no contemporary written records could shed light on the first building phases. In contrast to other material for dating, well-pre-served mortar is abundantly available from every building stage.We have gathered experience from AMS dating of 150 A °land mortar samples. Approximately half of them have age control from dendrochronology or from 14C analysis of wooden fragments in direct contact with the mortar. Of the samples with age control, 95% of the results agree with the age of the wood. The age control from dendrochronology, petrologic microscopy, chemical testing of the mortars, and mathematical modeling of their behavior during dissolution in acid have helped us to define criteria of reliability to interpret the 14C results when mortar dating is the only possibility to constrain the buildings in time. With these criteria, 80% of all samples reached conclusive results, and we have thus far been able to establish the chro-nology of 12 out of the 14 churches and chapels, while 2 still require complementary analyses.

AlkuperäiskieliEnglanti
Sivut171-204
JulkaisuRadiocarbon
Vuosikerta52
Numero1
DOI - pysyväislinkit
TilaJulkaistu - maaliskuuta 2010
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Sormenjälki Sukella tutkimusaiheisiin 'Successful ams <sup>14</sup>C dating of non-hydraulic lime mortars from the medieval churches of the Åland Islands, Finland'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.

Viittausmuodot