Charcoal and mollusc shell 14C-dating of the Dunaszekcső loess record, Hungary
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Tartalom: http://real.mtak.hu/40865/
Archívum: MTA Könyvtár
Gyűjtemény: Status = Submitted


Type = Article
Cím:
Charcoal and mollusc shell 14C-dating of the Dunaszekcső loess record, Hungary
Létrehozó:
Újvári, Gábor
Molnár, Mihály
Páll-Gergely, Barna
Kiadó:
Elsevier
Dátum:
2016
Téma:
QE Geology / földtudományok
QE02 Geochemistry / geokémia
Tartalmi leírás:
Accelerator mass spectrometry (AMS) radiocarbon dating of charcoals and 10 mollusc species (Ăľ2
identified at the family level) yield 64 new ages from the Dunaszekcs)o loess record, Hungary. Charcoal
14C ages are found to be protocol-dependent, with ages obtained from the high temperature (800 �C)
fraction of the two-step combustion (TSC) protocol being always the oldest and likely most reliable. One
step combustion (OSC) at 1000 �C produces comparable ages with those obtained from the low temperature
(400 �C) fraction of the TSC protocol. Discrepancies between the ABA-TSC400 and TSC800 ages
become larger for older, and less well-preserved charcoal fragments. Testing of shell ages against those of
charcoals reveals that Succineidae sp., Chondrula tridens, Trochulus hispidus and members of the family
Clausiliidae yield 14C ages that are statistically indistinguishable from charcoals recovered from the same
stratigraphic interval, or with the ABA-TSC800 charcoal age. Thus, these species show great potential for
creating accurate and precise chronologies for loess records within the useful range (<~40 ka) of 14Cdating
of land snails. Conservative estimates of 95% uncertainties of the resulting Bayesian age-depth
models are in the range of 500e800 yr. However, these uncertainties are strongly dependent on the
number of dates available and the resolution of sampling, but they are usually well below those of
luminescence chronologies.
Nyelv:
magyar
Típus:
Article
PeerReviewed
info:eu-repo/semantics/article
Formátum:
text
Azonosító:
Újvári, Gábor and Molnár, Mihály and Páll-Gergely, Barna (2016) Charcoal and mollusc shell 14C-dating of the Dunaszekcső loess record, Hungary. QUATERNARY GEOCHRONOLOGY, 35. pp. 43-53. ISSN 1871-1014 (Submitted)
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