Pregled bibliografske jedinice broj: 647439
Correcting for potential 222Rn loss in 210Pb geochronology in sediments from the South Adriatic Pit
Correcting for potential 222Rn loss in 210Pb geochronology in sediments from the South Adriatic Pit // Quaternary geochronology, 18 (2013), 93-98 doi:10.1016/j.quageo.2013.06.002 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 647439 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Correcting for potential 222Rn loss in 210Pb geochronology in sediments from the South Adriatic Pit
Autori
Štrok, Marko ; Smodiš, Borut ; Petrinec, Branko ; Franić, Zdenko
Izvornik
Quaternary geochronology (1871-1014) 18
(2013);
93-98
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
210Pb geochronology; sediments; Adriatic Sea; South Adriatic Pit
Sažetak
Measurement of 226Ra activity concentrations is often used to estimate supported levels of 210Pb for purposes of geochronology. However, the implicit assumption that supported 210Pb and 226Ra are in secular radioactive equilibrium may not always be true because of the migration of an intermediate product, gaseous 222Rn. As a consequence, supported 210Pb activity concentration might be lower than the measured 226Ra value, which was the case in a core collected from the South Adriatic Pit. Here we present a new approach to improve the determination of supported 210Pb, which is based on correction of 226Ra activity concentrations using the average (210Pb/226Ra) activity ratio in deeper sediment layers. Using this approach, sedimentation rates for the South Adriatic Pit with a constant rate of supply model and a constant initial concentration model were 0.054 g/cm2/a and 0.070 g/cm2/a, respectively.
Izvorni jezik
Engleski
Znanstvena područja
Fizika, Geologija
POVEZANOST RADA
Projekti:
022-0222882-2335 - RADIOAKTIVNOST OKOLIŠA I ZAŠTITA OD ZRAČENJA (Marović, Gordana, MZOS ) ( CroRIS)
022-0222882-2823 - Radioekologija Jadranskoga mora i priobalja (Franić, Zdenko, MZOS ) ( CroRIS)
Ustanove:
Institut za medicinska istraživanja i medicinu rada, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus