Investigation of a flowstone-like historical indoor-travertine (Rudas Spa, Budapest, Hungary) using the 14C "bomb-peak"

Virág, M ✉ [Virág, Magdolna (geológia, szpeleo...), szerző] Általános és Alkalmazott Földtani Tanszék (ELTE / TTK / Ft_K); Atommagkutató Intézet; Molnár, M [Molnár, Mihály (Interdiszciplináris), szerző] Atommagkutató Intézet; Braun, M [Braun, Mihály (Kémiai tudomány), szerző] Atommagkutató Intézet; Mindszenty, A [Mindszenty, Andrea (Geológia (szedime...), szerző] Általános és Alkalmazott Földtani Tanszék (ELTE / TTK / Ft_K)

Angol nyelvű Szakcikk (Folyóiratcikk) Tudományos
Megjelent: RADIOCARBON 0033-8222 62 (5) pp. 1419-1435 2020
  • SJR Scopus - Archeology (arts and humanities): D1
Travertine precipitated during the past ca. 120 years, from thermal waters in one of the historical Spas of the Buda Thermal Karst (Hungary) was investigated using radiocarbon (14C). The age of the deposit is based on the historic date of the structure on which the travertine was deposited. A textural study of the travertine buildup using a ~22-cm-long diamond-core crosscutting was undertaken. The original aim of the study was to improve our understanding of the controls and possibly also the rate of travertine-precipitation. In addition to characteristic, mm-scale, regular laminations, 0.5–1.0 cm dark-colored intervals were also observed in the core. Correlation of these latter textural changes with well-known changes in the water management of the Spa was greatly hindered by the lack of age data from the interior of the core. Therefore, in addition to the two known points (beginning in 1883 AD and ending 2004 AD) at least one age-datum point, somewhere inbetween, was necessary. Since the timespan of the core obviously included the 1960s of the last century, we expected that the 14C anomaly related to the atmospheric nuclear tests of those years could be detected by isotope-geochemistry. This paper gives a brief overview of the textural features of the investigated travertine and presents the dataset proving the incorporation of considerable amounts of atmospheric carbon in the carbonate precipitate, which, indeed, facilitated the indirect dating of the part of the core containing “bomb” 14C, and this helped us to unfold the factors controlling the observed textural changes of the travertine.
Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
2022-11-27 18:56