In the Buda Mts. (Hungary) several Pleistocene travertine outcrops are known. The subject of this paper is a stable isotope study on the Pleistocene travertine from Budakalász that was deposited on the slope of Monalovác Hill of the Buda Mts. The principal goal of this work is to define the depositional environment and related implications by studying the petrographical and microfacies features and C and O stable isotope compositions. The Budakalász travertine can be divided into two stratigraphic units. The lower part of the studied sections (approx. 15 m thick) consists of massive limestone, which represents a "smooth-slope" facies and has mean d13C and d18O values of 2.21‰ and -11.1‰ relative to V-PDB, respectively. Microbial shrub structures were also recognized in the lower part of the section, showing slightly higher d13C values (2.6-2.7‰) relative to the other samples. The upper unit of the sections is composed of what was originally calcareous mud. The studied samples have low d13C values (~1.8‰) and notably higher d18O values (~-10.6‰) than the average d18O value of the lower part of the section. The samples from the upper part contain microsparitic cement as an indication of stagnant water environment with calm lacustrine sedimentation and pond facies. Based on our integrated petrographic and microfacies description and stable isotope study, the Budakalász travertine can be classified as an originally thermogene travertine.
Guo, L., J. Andrew, R. Riding, P. Dennis, Q. Dresser 1996: Possible microbal effect on stable carbon isotope in hot-spring travertine. - J. of Sed. Research, 66, pp. 468--473.
'Possible microbal effect on stable carbon isotope in hot-spring travertine. ' () 66 J. of Sed. Research : 468 -473 .
Haas, J., A. Demény, 2001: Early dolomitisation of Late Triassic platform carbonates in the Transdanubian Range (Hungary). - Sed. Geology, 151, pp. 225--242.
'Early dolomitisation of Late Triassic platform carbonates in the Transdanubian Range (Hungary). ' () 151 Sed. Geology : 225 -242 .
Hoefs, J. 1987: Stable isotope geochemistry. - Springer-Verlag, Berlin, Heidelberg, New York, 241 p.
Stable isotope geochemistry. , () 241 .
Korpás, L. 2003: Basic pattern of Quaternary travertine: a review with special regard to the Hungarian deposits --- Acta Geol. Hung., 46/2, pp. 131--148 (this volume).
'Basic pattern of Quaternary travertine: a review with special regard to the Hungarian deposits --- Acta Geol. ' () 46/2 Hung. : 131 -148 .
Kovács, A. 1995: A budakalászi édesvizi mészk\H{o} mikrofácies vizsgálata (Microfacies study of the Budakalász travertine). - Diplomamunka., ELTE, Alkalmazott és Környezetföldtani Tanszék, 98 p. (In Hungarian.)
A budakalászi édesvizi mészk\H{o} mikrofácies vizsgálata (Microfacies study of the Budakalász travertine). , () 98 .
Kovács, J., P Müller 1980: Budai-hegyek hévizes tevékenységének kialakulása és nyomai (Thermal water-activity and its traces in the Buda Hills). - Karszt és Barlang, II. füzet, pp. 93--98.
'Budai-hegyek hévizes tevékenységének kialakulása és nyomai (Thermal water-activity and its traces in the Buda Hills). ' () II. füzet Karszt és Barlang : 93 -98 .
Minissale, A., D.M. Kerrick, G. Magro, M.T. Murrell, M. Paladini, S. Rihs, N.C. Sturchio, F. Tassi, O. Vaselli 2002: Geochemistry of Quarternary travertines in the region north of Rome (Italy): structural, hydrologic and paleoclimatic implications. --- Earth and Planetary Science Letters, 203, pp. 709--728.
'Geochemistry of Quarternary travertines in the region north of Rome (Italy): structural, hydrologic and paleoclimatic implications. ' () 203 Earth and Planetary Science Letters : 709 -728 .
Ohmoto, H., R.O. Rye 1979: Isotopes of sulfur and carbon. --- In: Barnes, H.L. (Ed.): Geochemistry of Hydrothermal Ore Deposits. --- John Wiley, New York, pp. 509--567.
Isotopes of sulfur and carbon. , () 509 -567 .
Panichi, C., E. Tongiorgi 1976: Carbon isotopic composition of CO2 from springs, fumaroles, mofettes and travertines of central and southern Italy: a preliminary prospection method of geothermal areas. - Proc. 2nd U. N. Symp. on the Develop, and Use of Geotherm. Energy, San Francisco, 20--29 May 1975, pp. 815--825.
'Carbon isotopic composition of CO2 from springs, fumaroles, mofettes and travertines of central and southern Italy: a preliminary prospection method of geothermal areas. ' , , .
Pentecost, A. 1995a: The Quaternary travertine deposits of Europe and Asia. - Quaternary Science Review, 14, pp. 1005--1028.
'The Quaternary travertine deposits of Europe and Asia. ' () 14 Quaternary Science Review : 1005 -1028 .
Pentecost, A. 1995b: Geochemistry of carbon dioxide in six travertine - depositing waters of Italy. -Journal of Hydrology, 167, pp. 263--278.
'Geochemistry of carbon dioxide in six travertine - depositing waters of Italy. ' () 167 Journal of Hydrology : 263 -278 .
Scheuer, Gy., F. Schweitzer 1980: A budai hévízforrások fejl\H{o}déstörténete a fels\H{o}pannontóI napjainkig (Evolution the Buda thermal springs from the Late Pannonian to nowadays). -Hidrológiai Közlöny, 11, pp. 492--501. (In Hungarian.)
'A budai hévízforrások fejl\H{o}déstörténete a fels\H{o}pannontóI napjainkig (Evolution the Buda thermal springs from the Late Pannonian to nowadays). ' () 11 Hidrológiai Közlöny : 492 -501 .
Scheuer Gy., F. Schweitzer, P Szlabóczky 1987: A budakalászi forrásvizi mészk\H{o}-el\H{o}fordulás mérnókgeológiai vizsgálata(Ingenieur-geological study of the Budakalász travertine). -Épít\H{o}anyag, 39, pp. 102--107. (In Hungarian.)
'A budakalászi forrásvizi mészk\H{o}-el\H{o}fordulás mérnókgeológiai vizsgálata(Ingenieur-geological study of the Budakalász travertine). ' () 39 Épít\H{o}anyag : 102 -107 .
Schréter Z. 1951: A Budai- és a Gerecse-hegység peremi édesvizi mészk\H{o} el\H{o}fordulásai (Travertine deposits along the border of the Buda and Gerecse Hills). - MÁFI Évi jelentés 1949-r\H{o}l, pp. 111--150. (In Hungarian.)
Schweitzer, F., M. Pécsi 1979: A Nyugat-Gerecsei édesvizi mészk\H{o}összletek litológiai és genetikai kutatésa, külöonös tekintettel a diszít\H{o}k\H{o}ként való esetleges felhasználhatóságra (Lithology and genesis of travertine in West Gerecse, with special regard for its utilization as ornamental stone. - MÁFI adattár, T-8913. 24 p. (manuscript) (In Hungarian.)
'A Nyugat-Gerecsei édesvizi mészk\H{o}összletek litológiai és genetikai kutatésa, külöonös tekintettel a diszít\H{o}k\H{o}ként való esetleges felhasználhatóságra (Lithology and genesis of travertine in West Gerecse, with special regard for its utilization as ornamental stone. ' () T-8913 MÁFI adattár : 24 .
Szlabóczky, P 1982: Jelentés a budakalászi mészk\H{o}bánya el\H{o}zetes-részletes fázìsú kutatásáról (Report about preliminary and detailed exploration of the Budakalász travertine). - OFKFV, 5. 47 p. (manuscript)
Turi, B. 1986: Stable isotope geochemistry of travertines. - In: Frit, P., J.Ch. Fontes (Eds): Handbook of Environmental Isotopic Geochemistry. - Elsevier Science Publishers, Amsterdam, pp. 207--238.
Stable isotope geochemistry of travertines. , () 207 -238 .
Fodor, L., Á. Magyari, A. Fogarasi, K. Palotás 1994: Tertiary tectonics and Late Paleogene sedimentation in the Buda Hills, Hungary. A new interpretation of the Buda line. - Földt. Közl., 124, pp. 240--248.
'Tertiary tectonics and Late Paleogene sedimentation in the Buda Hills, Hungary. A new interpretation of the Buda line. ' () 124 Földt. Közl. : 240 -248 .
Fouke, B.W., J.D. Farmer, D.J. Des Marais, L. Pratt, N.C. Sturchio, PC. Burns, M.K. Discipulo 2000: Depositional facies and aqueous-solid geochemistry of travertine-depositing hot springs (Angel Terrace, Mammoth Hot Springs, Yellowstone National Park, U.S.A). - J. of Sed. Research, 70, pp. 565--585.
'Depositional facies and aqueous-solid geochemistry of travertine-depositing hot springs (Angel Terrace, Mammoth Hot Springs, Yellowstone National Park, U.S.A). ' () 70 J. of Sed. Research : 565 -585 .
Valley, J.W., H.P Taylor, J.R. O'Neil 1987: Stable isotopes in high temperature geological processes. - Reviews in Mineralogy: Chelsea, Min. Soc. of Am., 16, pp. 1--40.
'Stable isotopes in high temperature geological processes. ' () 16 Reviews in Mineralogy: Chelsea, Min. Soc. of Am. : 1 -40 .
Vitális, Gy., I. Hegyi 1982: Adatok a Budapest térségi édesvízi mészkövek genetikájához (Data to genesis of travertine in Budapest and its surroundings). - Hidrológiai Közlöny, 2, pp 73--83.
'Adatok a Budapest térségi édesvízi mészkövek genetikájához (Data to genesis of travertine in Budapest and its surroundings). ' () 2 Hidrológiai Közlöny : 73 -83 .
Wein, Gy. 1977: A Budai-hegység tektonikaja (Tectonism of the Buda Hills). - MÁFI Alkalmi kiadvány, 76 p. (In Hungarian.)
'A Budai-hegység tektonikaja (Tectonism of the Buda Hills). ' () MÁFI Alkalmi kiadvány : 76 .
Bakacsi, Zs. 1993: A sütt\H{o}i édesvízi mészk\H{o} szedimentológiai vizsgálata (Sedimentological study of the Sütt\H{o} travertine). - Diplomamunka., ELTE, Alkalmazott és Környezetföldtani Tanszék, 108 p. (In Hungarian.)
Bakacsi, Zs., A. Mindszenty, E. Hertelendi 1994: Lacustrine-palustrine facies from the Pleistocene Carbonate lake of Sütt\H{o} (Hungary). - IAS 15th Reg. Meeting, Ischia, Italy, Abstract pp 41--42.
, , .
Craig, H. 1953: The geochemistry of stable carbon isotope. - Geochim. et Cosmochim. Acta, 3, pp. 53--92.
'The geochemistry of stable carbon isotope. ' () 3 Geochim. et Cosmochim. Acta : 53 -92 .
Craig, H. 1965: The isotopic geochemistry of water and carbon in geothermal area. - Symp. Nuclear Geol. Geothermal Areas, Spoleto, Italy, pp. 17--53.
'The isotopic geochemistry of water and carbon in geothermal area. ' () Spoleto, Italy Symp. Nuclear Geol. Geothermal Areas : 17 -53 .
Földvári, M., Zs. Berner, D. Stüben 2003: Thermoanalytical study of Quarternary thermal lacustrine travertine occurrences in Hungary (Buda-Vár-hegy, Budakalász, Szomód-Les-hegy). -Acta Geol. Hung., 46/2, pp. 195--204 (this volume).
'Thermoanalytical study of Quarternary thermal lacustrine travertine occurrences in Hungary (Buda-Vár-hegy, Budakalász, Szomód-Les-hegy). ' () 46/2 Acta Geol. Hung. : 195 -204 .
Rose, T.P., M.L. Davisson 1996: Radiocarbon in hydrologic systems containing dissolved magmatic carbon dioxide. - Science, 273, pp. 1367--1370.
'Radiocarbon in hydrologic systems containing dissolved magmatic carbon dioxide. ' () 273 Science : 1367 -1370 .
Pentecost, A., H. Viles 1994: A review and reassessment of travertine classification. - Géographie physique et Quaternaire, 48, pp. 305--314.
'A review and reassessment of travertine classification. ' () 48 Géographie physique et Quaternaire : 305 -314 .
Guo, L., R. Riding 1994: Origin and diagenesis of Quaternary travertine shrub fabric, Rapolano Terme, central Italy. - Sedimentology, 41, pp. 499--520.
'Origin and diagenesis of Quaternary travertine shrub fabric, Rapolano Terme, central Italy. ' () 41 Sedimentology : 499 -520 .
Guo, L., R. Riding 1999: Rapid facies changes in Holocene fissure ridge hot spring travertines, Rapolano Terme, Italy. - Sedimentology, 46, pp. 1145--1158.
'Rapid facies changes in Holocene fissure ridge hot spring travertines, Rapolano Terme, Italy. ' () 46 Sedimentology : 1145 -1158 .