14C Tephrochronology with Different Fractions of Paleosol Humic Matter at Procida Island, Italy
Author
Alessio, MarisaAllegri, Lucia
Azzi, Carlo
Calderoni, Gilberto
Cortesi, Cesarina
Improta, Salvatore
Petrone, Vincenzo
Issue Date
1989-01-01Keywords
Procida IslandPaleosols
tephrochronology
humates
Italy
Southern Europe
organic compounds
organic materials
Europe
methods
geochronology
C 14
carbon
dates
isotopes
radioactive isotopes
absolute age
Metadata
Show full item recordCitation
Alessio, M., Allegri, L., Azzi, C., Calderoni, G., Cortesi, C., Improta, S., & Petrone, V. (1989). 14C tephrochronology with different fractions of Paleosol humic matter at Procida Island, Italy. Radiocarbon, 31(3), 664-671.Journal
RadiocarbonDescription
From the 13th International Radiocarbon Conference held in Dubrovnik, Yugoslavia, June 20-25, 1988.Additional Links
http://radiocarbon.webhost.uits.arizona.edu/Abstract
14C apparent ages along with delta-13C values for three different fractions of humic matter (HM) isolated from a suite of four paleosols (PAs) interbedded within tephra are reported. The dated HM fractions were: 1) HA, the easily released humic acids; 2) HAtot, the bulk of humic acids; 3) RES, the insoluble HM. The 14C sequence dated from 13,000-25,000 BP, in agreement with stratigraphy and previous data. Age differences up to 2540 +/- 430 were statistically significant among fractions; their order of magnitude being independent from C content and depth. All the PAs showed a common pattern of among-fraction age variation, 14C agingltrending from RES to HA101 through HA. As the HM fractions exhibited quite comparable delta-13C values (delta-13C = -25.4 +/- 0.2 per mil), it is inferred that the primitive organic matter (OM) input to PAs was dominantly supplied by vegetation of C-3 photosynthetic pathway which underwent complete decomposition during diagenesis.Type
Proceedingstext
Language
enISSN
0033-8222ae974a485f413a2113503eed53cd6c53
10.1017/S0033822200012261