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Urs KLÖTZLI, Ao. Univ. Prof. Mag. Dr.

Room Number: 2A474
Tel.: +43-1-4277-53460
Mobile: +43-680-5533-860
Fax: +43-1-4277-9534

Research Interests:

  • Development and improvement of micro-analytical techniques for isotope analysis in geological materials with a special emphasis on high-precision Laser-Ablation MC-ICP-MS dating techniques.
  • Radiometric dating and the derivation of the duration of geological events and processes with a main focus on the orogenic and anorogenic formation and evolution of continental crust.
  • Petrochronology: Linking radiometric age information with metamorphic processes and the interplay of magmatic and metamorphic processes, theory and applications.

Current Projects:

  • Development of U/Th/Pb in-situ dating techniques for xenotime.
  • Geochronological and isotope geochemical aspects of the interaction of mantle and lower crustal processes in the Ivrea-Verbano Zone, Southern Alps, Italy.
  • U/Pb accessory mineral geochronology of the Permian and Triassic magmatism in the central-eastern Southern Alps, Italy.
  • Geochronology and isotope geochemistry of pre-Variscan plutonism in the Austroalpine Ötztal-Stubai complex, Eastern Alps, Austria.
  • Modelling of isotope fractionation effects in geomaterials.
  • Other running projects (mainly geochronologically oriented) are located in: Thailand, Western Carpathians, Cameroon, Turkey, ...


Burda, J., Klötzli, U.S. (2012): Pre-Variscan evolution of the Western Tatra Mts.:  new insights  from U-Pb zircon dating. Mineralogy and Petrology, DOI 10.1007/s00710-011-0176-4.

Karaoglan, F., Parlak, O., Klötzli, U., Thöni, M., Koller, F. (2012): U-Pb and Sm-Nd geochronology of the Kızıldağ (Hatay, Turkey) ophiolite:  implications for the timing and duration of suprasubduction zone type oceanic crust formation in southern Neotethys. Geological Magazine, in press.

Kanjanapayont, P., Klötzli, U.S., Thöni, M., Grasemann, B., Edwards, M. (2012): Rb-Sr, Sm-Nd, and U-Pb geochronology of the rocks within the Khlong Marui shear zone, southern Thailand. Journal of Asian Earth Sciences, 56, 263-275.

Parlak, O., Karaoglan, F., Rızaoglub, T., Klötzli, U., Koller, F., Billor, Z. (2012): U–Pb and 40Ar–39Ar geochronology of the ophiolites and granitoids from the Tauride belt: Implications for the evolution of the Inner Tauride suture. Journal of Geodynamics, in press.

Tenczer, V., Hauzenberger, Ch., Fritz, H., Hoinkes, G., Muhongo, S., Klötzli, U.S. (2012): Crustal age domains and metamorphic reworking of the deep crust in Northern-Central Tanzania: a U/Pb zircon and monazite age study. Mineralogy and Petrology, DOI 10.1007/s00710-012-0210-1.

Ertl., A., Schuster, R., Hughes, J.M., Ludwig, T., Meyer, H.P., Klötzli, U.S., Brandstätter, f., Lengauer, C., Tillmanns, E. (2011): Li-bearing tourmalines in Variscan pegmatites from the Moldanubic nappes, Lower Austria: Chemistry, crystal structures, spectroscopic and geochronological data. European Journal of Mineralogy, 24, 695–715.

Burda, J., Gaweda, A., Klötzli, U. (2011): Magma hybridization in the Western Tatra Mts. granitoid intrusion (S-Poland, Western Carpathians). Mineralogy and Petrology, DOI 10.1007/s00710-011-0150-1.

Tenczer, V., Hauzenberger, C., Fritz, H., Hoinkes, G., Muhongo, S., Klötzli, U.S. (2011): The P–T–X(fluid) evolution of meta-anorthosites in the Eastern Granulites, Tanzania.Journal of Metamorphic Geology, DOI 10.1111/j.1525-1314.2011.00929.

Miller, C., Zanetti, A., Thöni, M., Konzett, J., Klötzli, U. (2011): Mafic and silica-rich glasses in mantle xenoliths from Wau-en-Namus, Libya, textural and geochemical evidence for peridotite-melt reactions. Lithos, doi: 10.1016/j.lithos.2011.11.004.

Sinigoi, S., Quick, J.E., Demarchi, G., Klötzli, U.S. (2011): The role of crustal fertility in the generation of large silicic magmatic systems triggered by intrusion of mantle magma in the deep crust. Contributions to Mineralogy and Petrology, DOI 10.1007/s00410-011-0619-2.

Pomella, H., Klötzli, U., Scholger, R., Stipp, M., Fügenschuh, B. (2010): The Giudicarie fault system in the light of new paleomagnetic and geochronological data from boudinaged Eo-/Oligocene tonalites. International Journal of Earth Sciences, DOI 10.1007/s00531-010-0612-4.

Wyhlidal, S., Thöny, W. F., Tropper, P., Klötzli, U.S., Mair, V. (2010): Petrology and zircon geochronology of the northernmost Brixen Quartzphyllites (South-Tyrol, Italy): Clues to a complex pre-Variscan evolution of the Southalpine basement. Swiss Journal of Geosciences, 103/2, 273-281, DOI: 10.1007/s00015-010-0016-2.

Tajčmanová L., Soejono I., Konopásek J., Košler J., Klötzli U.S. (2010): Structural position of high-pressure felsic to intermediate granulites from NE Moldanubian domain (Bohemian Massif). Journal of the Geological Society, London, 167, 329-345.

Klötzli, U., Klötzli, E., Günes, Z., Košler, J. (2009): External accuracy of laser ablation U-Pb zircon dating: results from a test using five different reference zircons. Geostandards and Geoanalytical Research, 33/1, 5-15.

Iglseder, C., Grasemann, B., Schneider, D.A., Petrakakis, K., Miller, C., Klötzli, U., Thöni, M., Zámolyi, A., Rambousek, C. (2008): I and S-type Plutonism on Serifos (W-Cyclades, Greece). Tectonophysics, 473. 1-2, 69-83. doi: 10.1016/j.tecto.2008.09.021

Boulyga, S., Klötzli, U., Prohaska, T. (2008): Uranium isotope ratios determined by MC-ICP-MS and the assessment of total combined uncertainty budgets. Journal of Environmental Radioactivity, in press.

Marocchi, M., Morelli, C., Klötzli, U., Mair, V.,  Bargossi, G.M. (2008): A new stratigraphic systematic of the Lower Permian Athesian Volcanic Group (Southern Alps, Italy): Constraints from field mapping and Zircon geochronology. Journal of Geology, 116, 480-498.

Boulyga, S., Klötzli, U., Prohaska, T. (2007): Improved abundance sensitivity in MC-ICP-MS for determination of 236U/238U isotope ratios in the 10-7 to 10-9 range. Journal of Analytical Atomic Spectrometry, 21, 1427-1430.

Tumiati, S., Godard, G., Martin, S., Klötzli, U., Monticelli, D. (2007): Fluid-controlled crustal metasomatism within a high-pressure subducted mélange (Mt. Hochwart, Eastern Italian Alps). Lithos, 94, 148-167.

Prohaska, Th., Teschler-Nicola, M., Galler, P., Prychistal, A., Stingeder, G., Jelenc, M., Klötzli, U. (2006): Non Destructive Determination of 87Sr/86Sr Isotope Ratios in Early Upper Paleolithic Human Teeth from the Mladec Caves - Preliminary Results. In: Teschler-Nicola, M. (ed.): Early Modern Humans at the Moravian Gate: The Mladec Caves and their Remains. Springer Verlag New York, 505-514.

Faupl, P., Pavlopoulos, A., Klötzli, U., Petrakakis, K. (2006): On the provenance of mid-Cretaceous turbidites of the Pindos zone (Greece): Implications from heavy mineral distribution, detrital zircon ages and chrome spinel chemistry. Geological Magazine, 143, 329-342.

Shalaby, A., Stüwe, K., Klötzli, U., Makroum, F., Fritz, H., Kebede, T. (2005): The Wadi Mubarak Belt, Eastern Desert, Egypt: A Neoproterozoic conjugate shear system in the Arabian-Nubian Shield. Precambrian Research, 136, 27-50.

Kebede, T., Klötzli, U., Kosler, J., Skiöld, T. (2005): Understanding pre-Variscan and Variscan basement components of the central Tauern Window, Eastern Alps (Austria): constraints from new single zircon U-Pb geochronology. International Journal of Earth Sciences, 94, 336-353.

Katongo, C., Klötzli, U., Koller, F., Köberl, C., Tembo, F., De Waele, B. (2005): Petrography, geochemistry and geochronology of key granitoid rocks in the Neoproterozoic-Paleozoic Lufilian-Zambezi belt, Zambia: Implications for tectonic setting and regional correlation. Journal of African Earth Sciences, 40, 219-244.

Klötzli, U., Buda, G., Skiöld, T. (2004): Zircon typology, geochronology and whole rock Sr-Nd isotope systematics of the Mecsek Mountain granitoids in the Tisia Terrane (Hungary). Mineralogy and Petrology, 81, 113-134.

Lelkes-Felvári, G., Klötzli, U. (2005): Zircon geochronology of the Kékkút Quartz Porphyry, Balaton highland, Transdanubian Central Range, Hungary. Acta Geologica, 47, 139-149.

Bregar, M., Bauernhofer, A., Pelz, K., Klötzli, U., Fritz, H., Neumayr, P. (2002): A late Panafrican magmatic core complex in the Eastern Desert of Egypt: Emplacement of granitoids in a shear extensional regime. Precambrian Research, 118, 59-82.

Miller, C., Klötzli, U., Frank, W., Thöni, M., Grasemann, B. (2002): Comment on Geochemistry of the 2.51 Ga old Rampur group pelites, western Himalayas: implications for their provenance and weathering by Bhat and Gosh (2001). Precambrian Research, 116, 155-156.

Klötzli, U., Koller, F., Scharbert, S., Höck, V. (2002): Cadomian lower crustal contributions to Variscan granite petrogenesis (South Bohemian pluton, Austria). Journal of Petrology, 43/9, 1783-1786.

Neubauer, F., Klötzli, U., Poscheschnik, P. (2001): Cadomian magmatism in the Alps recorded in Late Ordovician sandstones of the Carnic Alps: results from zircon evaporation dating. Schweizerische Mineralogische und Petrographische Mitteilungen, 81, 175-179.

Meli, S., Klötzli, U. (2001): Evidence for Lower Paleozoic magmatism in the Eastern Southalpine basement: zircon geochronology on Comelico porphyroids (Italy). Schweizerische Mineralogische und Petrographische Mitteilungen, 81, 147-157.

Loizenbauer, J., Wallbrecher, E., Fritz, H., Neumayr, P., Khudeir, A.A., Klötzli, U. (2001): Geology of the Meatiq metamorphic core complex: implications for Post-Rodinian tectonics in the Eastern Desert of Egypt: New constraints from age dating and fluid inclusion studies. Precambrian Research, 110,357-383.

Miller, C., Thöni, M., Frank, W., Grasemann, B., Klötzli, U., Guntli, P., Draganits, E. (2001): The Early Palaeozoic magmatic event in the NW Himalaya, India: source, tectonic setting and age of emplacement. Geological Magazine, 138, 237-251.

Kebede, T., Klötzli, U., Köberl, Chr. (2001): U/Pb and Pb/Pb zircon ages from granitoid rocks of Wallagga area: constraints on magmatic and tectonic evolution of Precambrian rocks of western Ethiopia. Mineralogy and Petrology, 71, 251-271.

Klötzli, U., Koller, F., Scharbert, S., Höck, V. (2001): Cadomian lower crustal contributions to Variscan granite petrogenesis (South Bohemian pluton, Austria): Constraints from zircon typology and geochronology, whole-rock, and feldspar Pb-Sr isotope systematics. Journal of Petrology, 42/9, 1621-1642.

Buda, G., Puskás, Z., Gál-Sólymos, K., Klötzli, U., Cousens, B.L. (2000): Mineralogical, petrological and geochemical characteristics of crystalline rocks of the Üveghuta boreholes (Mórágy Hills, South Hungary). Annual Report of the Geological Institute of Hungary (1999, 2000), 1-23.

Miller, C., Klötzli, U., Frank, W., Thöni, M., Grasemann, B. (2000): Proterozoic crustal evolution in the NW Himalaya (India) as recorded by circa 1.80 Ga mafic and 1.84 Ga granitic magmatism. Precambrian Research, 103, 191-206.

Miller, C., Schuster, R., Klötzli, U., Frank, W. (2000): Late Cretaceous-Tertiary magmatic and tectonic events in the Transhimalaya batholith (Kailas area, SW Tibet). Schweizerische Mineralogische und Petrographische Mitteilungen, 80, 1-20.

Klötzli, U., Frank, W., Scharbert, S., Thöni, M. (1999): The evolution of the SE Bohemian Massif based on geochronological data: a review. Jahrbuch der Geologischen Bundesanstalt, 141/4, 377-394.

Miller, C., Schuster, R., Klötzli, U., Frank, W., Purtscheller, F. (1999): Post-collisional potassic and ultrapotassic magmatism in SW Tibet: Geochemical and Sr-Nd-Pb-O isotopic constraints for mantle source characteristics and petrogenesis. Journal of Petrology, 40/9, 1399-1424.

Klötzli, U. (1999): Resolving complex geological histories by zircon dating: A discussion of case studies from the Bohemian Massif and the Eastern Alps. Mitteilungen der Österreichischen Geologischen Gesellschaft, 90, 31-41.

Klötzli, U. (1999): Th/U zonation in zircon derived from evaporation analysis: A model and implications. Chemical Geology, 158, 325-333.

Koller, F. and Klötzli, U.S. (1998): The evolution of the South Bohemian Pluton. In: Breiter K. (Ed.): Genetic significance of phosphorous in fractionated granites . IGCP373, Czech Geological Survey, 11-14.

Klötzli, U., Koller, F. (1998): Sarleinsbach type of Weinsberg granite. In: Breiter K. (Ed.): Genetic significance of phosphorous in fractionated granites . IGCP373, Czech Geological Survey, 137-140.

Meli, S., Klötzli, U. (1997): Preliminary geochronological results on the pre-Variscan metavolcanics of the eastern southalpine basement. Plinius, 18, 144-155.

Klötzli-Chowanetz, E., Klötzli, U., Koller, F. (1997): Lower Ordovician migmatisation in the Ötztal crystalline basement (Austria): linking U/Pb and Pb-Pb dating with zircon morphology. Schweizerische Mineralogische und Petrographische Mitteilungen, 77, 315-324.

Klötzli, U. (1997): Zircon evaporation TIMS: Method and procedures. The Analyst, 122, 1239-1248.

Klötzli, U., Parrish, R.R. (1996): Zircon U-Pb and Pb-Pb geochronology of the Rastenberg granodiorite, South Bohemian Massif, Austria. Mineralogy and Petrology, 58, 197-214.

Bernhard, F., Klötzli, U., Hoinkes, G., Thöni, M. (1996): Constraints on the age and origin of a polymetamorphic felsic intrusion in the Ötztal Crystalline Basement, Austria. Mineralogy and Petrology, 58, 171-196.

Frimml, H.E., Klötzli, U., Siegfried, P.R. (1996): New Pb-Pb single zircon age constraints on the timing of Neoproterozoic glaciation and continental break-up in Namibia. Geological Magazine, 104, 459-469.

Miller, Ch., Schuster, R., Klötzli, U., Mair, V., Frank, W., Purtscheller, F. (1996): Miocene ultrapotassic rocks from South-western Tibet. Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 141, 150-152.

Müller, B., Klötzli, U., Schaltegger, U., Flisch, M. (1996): Early Cambrian oceanic plagiogranite in the Silvretta Nappe, Eastern Alps: geochemical, zircon U-Pb and Rb-Sr data from garnet-hornblende-plagioclase gneisses. Geologische Rundschau, 85, 822-831.

Klötzli, U. (1995): Boron isotope systematics from the Larderello geothermal field (Italy) and associated boron fractionation factors. Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 140, 35-47.

Klötzli, U. (1995): Bericht über die Kartierungsarbeiten 1993 im Grenzbereich der Kartenblätter Lienz (179) und Hopfgarten (178). Jahrbuch der Geologischen Bundesanstalt, Wien, 1995, 137, 515 - 516.

Klötzli, U. (1995): Geochronologische Untersuchungen an Metagranitoiden im ostalpinen Altkristallin W und S des Tauernfensters. Arbeitstagung der Geologischen Bundesanstalt, Lienz, 95 - 97.

Müller, B., Klötzli, U., Flisch, M. (1995): U-Pb-zircon dating of the Older Orthogneiss suite in the Silvretta nappe, Eastern Alps: Cadomian magmatism in the Upper Austroalpine realm. Geologische Rundschau, 84, 457-465.

Klötzli, U. (1994): Crustal reworking, magma generation, and intrusion history of Variscan granitoids of the South Bohemian Pluton (Bohemian Massif, Austria): A zircon Pb-Pb and U-Pb study. Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 139, 320-322.

Klötzli, U., Parrish, R.R. (1994): Zircon Pb-Pb and U-Pb geochronology of the Rastenberg granodiorite (Lower Austria): Evidence for the incorporation of Cadomian and possibly Archean crust into Variscan granitoids of the South Bohemian Pluton. Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 139, 68-70.

Richter, W., Jawecki, Ch., Koller, F., Linner, M., Petrakakis, K., Klötzli, U., Frank, W., Scharbert, S., Neubauer, F., Höck, V., Montag, O., Fritz, H., Brandmayer, M., Wallbrecher, E., Dallmeyer, R.D. (1994): Geology of the Moldanubian zone. Final Conference Pre-Alpine crust in Austria, Krems, 1-47.

Klötzli, U. (1993): Einzelzirkon-207Pb/206Pb-Datierungen an Gesteinen der südlichen Böhmischen Masse (Rastenberger Granodiorit, Weinsberger Granit) Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 138, 123-130.

Klötzli, U. (1992): Negative thermal ionisation mass spectrometry: a new approach to boron isotope geochemistry. Chemical Geology, 101, 111-122.

Prochaska, W., Bechtel, A, Klötzli, U. (1991): Leucophyllite formation and alteration in shear zones (Gleinalmkristallin, Eastern Alps/Austria). Mineralogy and Petrology, 45, 195-216.

Bürgi, A., Klötzli, U. (1990): New data on the evolutionary history of the Ivrea zone (Northern Italy). Bulltin of the Swiss Association of Petroleum Geologists, 56/130, 49-70.

Professional affiliations:

  • Member of the Swiss Society of Mineralogy and Petrology
  • Member of the Geological Society of America
  • Member of the American Geophysical Union
  • Member of the European Asscociation for Geochemistry

Reviewer activities:

  • Reviewer for Chemical Geology
  • Reviewer for Journal of Petrology
  • Reviewer for International Journal of Earth Sciences
  • Reviewer for Lithos
  • Reviewer for Mineralogy and Petrology
  • Reviewer for the Swiss Journal of Geosciences
  • Reviewer for the Austrian Journal of Earth Sciences
  • Reviewer for the Bulletin of the Swiss Society of Mineralogy and Petrology
  • Reviewer for Geologica Carpathica
  • Rewiever for the Journal of Analytical Atomic Spectrometry
  • Member of the editorial board of the Central European Journal of Geosciences 
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