Rudjer Bošković Institute Radiocarbon Measurements XVII

Horvatinčić, Nada; Bronić, Ines Krajcar; Obelić, Bogomil; Barešić, Jadranka

doi:10.2458/azu_js_rc.v54i1.15829

Cited by 4 publications

(5 citation statements)

References 25 publications

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Section: Possibility Of Tufa Isotopic Composition Of Oxygen As Paleoclimate Proxymentioning

confidence: 73%

“…At the same time there is practically no difference in δ 13 C values between the Holocene (mean value −10.04 ± 0.57‰, n = 18) and older samples ("old") (mean value −9.73 ± 0.78‰, n = 6) (Figure 2a). Here, the Holocene δ 13 C value data for the Zrmanja River tufa samples were taken from [64]. These values indicate that during the tufa deposition carbon source did not change.…”

Section: Resultsmentioning

confidence: 95%

“…The Holocene δ 18 O values obtained from the Zrmanja area (present results and data from [64]) are higher (between −9.5‰ and −7.0‰) than the Holocene authigenic carbonates from a well investigated area of the Plitvice Lakes system, where δ 18 O ranges between −11.9‰ and −8.7‰ [2][3][4]34,64,73]. This can be explained by environmental settings, and continental and altitude effects [4,64,[74][75][76][77][78]. The Plitvice Lakes are at higher elevations (between 400 and 700 m asl) and are characterized by the moderate mountain climate (Cfb) compared to the Zrmanja locations with Csa climate type [79][80][81] and at lower elevations (<100 m asl).…”

Section: Possibility Of Tufa Isotopic Composition Of Oxygen As Paleoclimate Proxymentioning

confidence: 87%

“…Other indications of the relevant dates of the samples can be obtained from the difference of δ 18 O values between the Holocene samples (younger than 10,000 BP (11,700 cal BP)) and the "old" samples (older than 20,000 BP), Figure 2b. The Holocene samples, which have a mean value of δ 18 O = −8.02 ± 0.72‰ (n = 18, present data and data from [64]), precipitated from water of approximate temperature of 16.4 °C calculated from paleotemperature Equation (2) [65]:…”

Section: Possibility Of Tufa Isotopic Composition Of Oxygen As Paleoclimate Proxymentioning

confidence: 99%

“…Box-plot of (a) δ 13 C and (b) δ 18 O values for Holocene and "old" samples. Data for the Holocene tufa samples taken from Table2and[64].…”

mentioning

confidence: 99%

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The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia

et al. 2021

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Tufa is a fresh-water surface calcium carbonate deposit precipitated at or near ambient temperature, and commonly contains the remains of macro- and microphytes. Many Holocene tufas are found along the Zrmanja River, Dalmatian karst, Croatia. In this work we present radiocarbon dating results of older tufa that was found for the first time at the Zrmanja River near the Village of Sanaderi. Tufa outcrops were observed at different levels, between the river bed and up to 26 m above its present level. Radiocarbon dating of the carbonate fraction revealed ages from modern, at the river bed, up to 40 kBP ~20 m above its present level. These ages fit well with the hypothesis that the Zrmanja River had a previous surface connection with the Krka River, and changed its flow direction toward the Novigrad Sea approximately 40 kBP (Marine Isotope Stage 3). Radiocarbon AMS dating of tufa organic residue yielded a maximum conventional age of 17 kBP for the highest outcrop position indicating probable penetration of younger organic material to hollow tufa structures, as confirmed by radiocarbon analyses of humin extracted from the samples. Stable carbon isotope composition (δ13C) of the carbonate fraction of (−10.4 ± 0.6)‰ and (−9.7 ± 0.8)‰ for the Holocene and the older samples, respectively, indicate the autochthonous origin of the carbonate. The δ13C values of (−30.5 ± 0.3)‰ and (−29.6 ± 0.6)‰ for organic residue, having ages <500 BP and >5000 BP, respectively, suggest a unique carbon source for photosynthesis, mainly atmospheric CO2, with an indication of the Suess effect in δ13C during last centuries. The oxygen isotopic composition (δ18O) agrees well with deposition of tufa samples in two stages, the Holocene (−8.02 ± 0.72‰) and “old” (mainly MIS 3 and the beginning of MIS 2) (−6.89 ± 0.34‰), suggesting a ~4 °C lower temperature in MIS 3 compared to the current one.

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Section: Possibility Of Tufa Isotopic Composition Of Oxygen As Paleoclimate Proxymentioning

confidence: 73%

Section: Resultsmentioning

confidence: 95%

Section: Possibility Of Tufa Isotopic Composition Of Oxygen As Paleoclimate Proxymentioning

confidence: 87%

Section: Possibility Of Tufa Isotopic Composition Of Oxygen As Paleoclimate Proxymentioning

confidence: 99%

“…Box-plot of (a) δ 13 C and (b) δ 18 O values for Holocene and "old" samples. Data for the Holocene tufa samples taken from Table2and[64].…”

mentioning

confidence: 99%

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The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia

et al. 2021

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Hydrogeochemical and environmental isotope study of Topusko thermal waters, Croatia

Pavić,

Briški,

Pola

et al. 2024

Environ Geochem Health

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Thermal waters in Topusko (Croatia), with temperatures of up to 65 °C, have been used for heating, health, and recreational tourism for the past fifty years. Hydrogeochemical monitoring can provide insights into deeper geological processes and indicate system changes from baseline levels. It helps to identify potential anthropogenic impacts, as well as natural changes. Hydrogeochemical, geothermometrical, and environmental isotope studies of thermal waters in Topusko were conducted to improve the existing conceptual model of the Topusko hydrothermal system (THS), providing a baseline for continuous monitoring of the thermal resource. 2-year thermal springs and precipitation monitoring took place from March 2021 until March 2023. Major anions and cations, stable and radioactive isotopes (i.e. 18O, 2H, SO42−, 3H and 14C) and geothermometers were used to assess the origin of thermal waters in Topusko and their interaction with thermal aquifer. The results indicate the meteoric origin of thermal water, which was recharged in colder climatic conditions around the late Pleistocene–Early Holocene. Thermal water was last in contact with the atmosphere before approximately 9.5 kyr. Ca-HCO3 hydrochemical facies suggests carbonate dissolution as the dominant process driving the solute content. Geothermometrical results indicate an equilibrium temperature in the reservoir of 90 °C.

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Speleothem-based Quaternary research in Croatian karst – A review

Surić

2018

Quaternary International

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Rudjer Bošković Institute Radiocarbon Measurements XVII

Cited by 4 publications

References 25 publications

The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia

The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia

Hydrogeochemical and environmental isotope study of Topusko thermal waters, Croatia

Speleothem-based Quaternary research in Croatian karst – A review

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