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    Radiocarbon and Uranium-Series Dating of the Plitvice Lakes Travertines

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    Author
    Srdoč, Dušan
    Osmond, J. K.
    Horvatinčić, Nada
    Dabous, Adel A.
    Obelić, Bogomil
    Issue Date
    1994-01-01
    Keywords
    organic carbon
    solution features
    speleothems
    actinides
    thorium
    U 238 U 234
    uranium
    faults
    calcite
    Croatia
    Eastern Alps
    Cretaceous
    Mesozoic
    Yugoslavia
    uranium disequilibrium
    fluvial features
    karst
    Wurm
    Dinaric Alps
    Jurassic
    Plitvice Lakes
    Triassic
    U 234 Th 230
    Upper Triassic
    waterfalls
    growth
    travertine
    Southern Europe
    isotope ratios
    Alps
    metals
    Pleistocene
    upper Pleistocene
    organic compounds
    organic materials
    Europe
    Cenozoic
    Quaternary
    methods
    C 14
    carbon
    dates
    isotopes
    radioactive isotopes
    absolute age
    sedimentary rocks
    carbonate rocks
    carbonates
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    Citation
    Srdoč, D., Osmond, J. K., Horvatinčić, N., Dabous, A. A., & Obelić, B. (1994). Radiocarbon and uranium-series dating of the Plitvice Lakes travertines. Radiocarbon, 36(2), 203-219.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/653379
    DOI
    10.1017/S0033822200040509
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    Radiocarbon and uranium-series ages of the calcareous deposits of the Plitvice Lakes show that travertines were deposited during three warm, humid, interglacial oxygen isotope stages. According to our measurements, only calcite crystals or crystal aggregates represent reliable material for both 230Th/234U and 234U/238U dating. Compact old travertine in the form of sandstone is less reliable; it can be dated by both methods provided that its detrital contamination is not significant, demonstrated by very low 14C activity (<1.5-2.0 pMC) and a high 230Th/232Th ratio. Old porous travertine contaminated with recent carbonates and Th-bearing clay (pMC > 5, 230Th/232Th < 5) gives erroneous results by both methods. Stage 1(Holocene) deposition is shown primarily by 14C dating corroborated by sedimentological and palynologic studies as well as by both 230Th/ 234U and 234U/238U disequilibrium methods. The intensive growth of travertine barriers coincided with significant climate warming in the Holocene. Stage 5 deposition is confirmed by the 230Th/234U dating of crystalline calcite aggregates embedded in the travertine matrix and by concordant 230Th/234U and 234U/238U ages, assuming that the 234U/238U activity ratio of 1.88 observed in modern streams and in Holocene deposits can be extended to past epochs. The travertine deposition period was very short, peaking ca. 120 +/- 10 ka BP. Stage 11 deposition is indicated by 234U/238U dating only, the period being within the 234U decay range, but not that of 230Th. Stage 11 travertine was deposited ca. 420 +/- 50 ka BP. We did not find travertine samples with U-series ages indicating a growth period during relatively warm Stages 7 and 9; due to the scarcity of old travertine outcrops, these and possibly other stages cannot be excluded on the basis of presented data. All of these isotopic dating results concur with the field relation of the travertine complex of the Plitvice Lakes.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200040509
    Scopus Count
    Collections
    Radiocarbon, Volume 36, Number 2 (1994)

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