Heidelberg University
Institute of Earth Sciences

Im Neuenheimer Feld 236
69120 Heidelberg

Phone: +49 6221 54-8206
Fax: +49 6221 54-4805


Isotope Geology and Petrology

Thomas Ludwig


Institute of Earth Sciences

Ruprecht-Karls-Universität Heidelberg

Im Neuenheimer Feld 236

D-69120 Heidelberg

Room: 507
+49 6221 54-4678
+49 6221 54-4811



Academic career and professional employment

Since 05/1994 Research Scientist, Institute of Earth Sciences, Heidelberg University



Current teaching


  • Laboratory methods in Earth Sciences
  • Secondary ion mass spectrometry







Bischoff, A., Alexander, C. M. O’D., Barrat, J.-A., Burkhardt, C., Busemann, H., Degering, D., Di Rocco, T., Fischer, M., Fockenberg, T., Foustoukos, D. I., Gattacceca, J., Godinho, J. R. A., Harries, D., Heinlein, D., Hellmann, J. L., Hertkorn, N., Holm, A., Jull, A. J. T., Kerraouch, I., King, A. J., Kleine, T., Koll, D., Lachner, J., Ludwig, T., Merchel, S., Mertens, C. A. K., Morino, P., Neumann, W., Pack, A., Patzek, M., Pavetich, S., Reitze, M. P., Rüfenacht, M., Rugel, G., Schmidt, C., Schmitt-Kopplin, P., Schönbächler, M., Trieloff, M., Wallner, A., Wimmer, K., Wölfer, E. (2021) The old, unique C1 chondrite Flensburg – Insight into the first processes of aqueous alteration, brecciation, and the diversity of water-bearing parent bodies and lithologies. Geochimica et Cosmochimica Acta, v. 293, p. 142-186,




Ivanova, M. A., Lorenz, C. A., Humayun, M., Corrigan, C. M., Ludwig, T., Trieloff, M., Righter, K., Franchi, I. A., Verchovsky, A. B., Korochantseva, E. V., Kozlov, V. V., Teplyakova, S. N., Korochantsev, A. V., Grokhovsky, V. I. (2020) Sierra Gorda 009: A new member of the metal-rich G chondrites grouplet. Meteoritics & Planetary Science, 55 (8), 1086-9379,


Potrafke, A., Breiter, K., Ludwig, T., Neuser, R. D., Stalder, R. (2020) Variations of OH defects and chemical impurities in natural quartz within igneous bodies. Physics and Chemistry of Minerals 47:24,


Litvinenko, A.K., Sorokina, E.S., Häger, T., Kostitsyn, Y.A., Botcharnikov, R.E., Somsikova, A.V., Ludwig, T., Romashova, T.V., Hofmeister, W. (2020) Petrogenesis of the Snezhnoe Ruby Deposit, Central Pamir. Minerals 2020, 10, 478.




Dohmen, R., Marschall, H. R., Ludwig, T., Polednia, J. (2019) Diffusion of Zr, Hf, Nb and Ta in rutile: effects of temperature, oxygen fugacity, and doping level, and relation to rutile point defect chemistry. Phys Chem Minerals 46, 311–332,


Epp, T., Marks, M. A. W., Ludwig, T., Kendrick, M. A., Eby, N., Neidhardt, H., Oelmann, V., Markl, G. (2019) Crystallographic and fluid compositional effects on the halogen (Cl, F, Br, I) incorporation in pyromorphite-group minerals. American Mineralogist, 104 (11): 1673–1688,


Vakhrameeva, P., Wulf, S., Koutsodendris, A., Tjallingii, R., Fletcher, W. J., Appelt, O., Ludwig, T., Knipping, M., Trieloff, M., Pross, J. (2019) Eastern Mediterranean volcanism during marine isotope stages 9 to 7e (335–235 ka): Insights based on cryptotephra layers at Tenaghi Philippon, Greece. Journal of Volcanology and Geothermal Research, v. 380, p. 31-47,


Potrafke, A., Stalder, R., Schmidt, B. C., Ludwig, T. (2019) OH defect contents in quartz in a granitic system at 1–5 kbar. Contributions to Mineralogy and Petrology, v. 174 (98),




Bast R, Scherer EE, Mezger K, Austrheim H, Ludwig T, Marschall HR, Putnis A, Löwen K (2014) Boron isotopes in tourmaline as a tracer of metasomatic processes in the Bamble sector of Southern Norway. Contributions to Mineralogy and Petrology 168 (4): 1069


Martin-Garcia R, Alonso-Zarza AM, Martin-Perez A , Schröder-Ritzrau A, Ludwig T (2014) Relationships between colour and diagenesis in the aragonite-calcite speleothems in Basajaun Etxea cave, Spain. Sedimentary Geology 312: 63–75




Cabato J, Altherr R, Ludwig T, Meyer HP (2013) Li, Be, B concentrations and delta Li-7 values in plagioclase phenocrysts of dacites from Nea Kameni (Santorini, Greece). Contributions to Mineralogy and Petrology 165 (6): 1135–1154


Marschall HR, Dohmen R, Ludwig T (2013) Diffusion-induced fractionation of niobium and tantalum during continental crust formation. Earth and Planetary Science Letters 375: 361–371




Ertl A, Giester G, Ludwig T, Meyer HP, Rossman GR (2012) Synthetic B-rich olenite: Correlations of single-crystal structural data. American Mineralogist, 97 (10): 1591–1597


Ertl A, Schuster R, Hughes JM, Ludwig T, Meyer HP, Finger F, Dyar MD, Ruschel K, Rossman GR, Klotzli U, Brandstatter F, Lengauer CL, Tillmanns E (2012) Li-bearing tourmalines in Variscan granitic pegmatites from the Moldanubian nappes, Lower Austria. European Journal of Mineralogy 24 (4): 695–715


Pabst S, Zack T, Savov IP, Ludwig T, Rost D, Tonarini S, Vicenzi EP (2012) The fate of subducted oceanic slabs in the shallow mantle: insights from boron isotopes and light element composition of metasomatized blueschists from the Mariana forearc. Lithos 132–133: 162–179




Hezel D, Kalt A, Marschall HR, Ludwig T, Meyer H-P (2011) Major element and Li, Be compositional evolution of tourmaline in an S-type granite-pegmatite system and its country rocks: an example from the island of Ikaria (Aegean Sea, Greece). Canadian Mineralogist 49: 321–340


Kaliwoda M, Marschall HR, Marks MA, Ludwig T, Altherr R, Markl G (2011) Boron and boron isotope systematics in the peralkaline Ilímaussaq intrusion (South Greenland) and its granitic country rocks: interplay between magmatic and hydrothermal processes. Lithos 125: 51–64


Klemme S, Marschall HR, Jacob D, Prowatke S, Ludwig T (2011) Trace element partitioning and boron isotope fractionation between mica and tourmaline. Canadian Mineralogist 49: 165–176


Ludwig T, Marschall HR, Pogge von Strandmann PAE, Shabaga BM, Fayek M, Hawthorne FC (2011) A secondary ion mass spectrometry (SIMS) re-evaluation of B and Li isotopic compositions of Cu-bearing elbaite from three global localities Mineralogical Magazine 75: 2485–2494


Marocchi M, Marschall HR, Konzett J, Tropper P, Ludwig T, Mair V, Bargossi GM (2011) Metasomatic tourmaline in hybrid contact bands between gneiss and peridotite in the Ulten Zone (Eastern Italian Alps): geochemistry and boron isotopic composition determined by SIMS. Canadian Mineralogist 49: 245–261


Pabst S, Savov I, Ludwig T, Rost D, Vicenzi E, Zack T (2011) Evidence for boron incorporation into the serpentine crystal structure. American Mineralogist 96: 1112–1119


Stähle V, Altherr R, Nasdala L, Ludwig T (2011) Ca-rich majorite derived from high-temperature melt and thermally stressed hornblende in shock veins of crustal rocks from the Ries impact crater (Germany). Contributions to Mineralogy and Petrology 161: 275–291


Van Lichtervelde M, Holtz F, Dziony W, Ludwig T, Meyer H-P (2011) Incorporation mechanisms of Ta and Nb into zircon and implications for pegmatitic systems. American Mineralogist 96:1079–1089


Vils F, Müntener O, Kalt A, Ludwig T (2011) Implications of the serpentine phase transition on the behaviour of beryllium and lithium-boron of subducted ultramafic rocks. Geochimica et Cosmochimica Acta 75: 1249–1271




Ertl A, Rossman GR, Hughes JM, London D, Wang Y, O'Leary JA, Dyar MD, Prowatke S, Ludwig T, Tillmanns E (2010) Tourmaline of the elbaite-schorl series from the Himalaya Mine, Mesa Grande, California: A detailed investigation. American Mineralogist 95, 24–40




Ertl A, Kolitsch U, Meyer H-P, Ludwig T, Lengauer CL, Nasdala L, Tillmanns E (2009) Substitution mechanism in tourmalines of the “fluor-elbaite“–rossmanite series from Wolkenburg, Saxony, Germany. Neues Jahrbuch für Mineralogie – Abhandlungen 186: 51-61


Hanrahan M, Brey G, Woodland A, Seitz H-M, Ludwig T (2009) Li as a barometer for bimineralic eclogites: Experiments in natural systems. Lithos 112: 992–1001


Luvizotto GL, Zack T, Meyer H-P, Ludwig T, Triebold S, Kronz A, Münker C, Stockli DF, Prowatke S, Klemme S, Jacob DE, von Eynatten H (2009) Rutile crystals as potential trace element and isotope mineral standards for microanalysis. Chemical Geology 261: 346–369


Marschall HR, Korsakov AV, Luvizotto GL, Nasdala L, Ludwig T (2009) On the occurrence and boron isotope composition of tourmaline in (ultra)high-pressure metamorphic rocks. Journal of the Geological Society London 166: 811–823


Marschall HR, Meyer C, Wunder B, Ludwig T, Heinrich W (2009) Experimental boron isotope fractionation between tourmaline and fluid: confirmation from in situ analyses by secondary ion mass spectrometry and from Rayleigh fractionation modelling. Contributions to Mineralogy and Petrology 158: 675–681




Kaliwoda M, Ludwig T, Altherr R (2008) A new SIMS study of Li, Be, B and δ7Li in mantle xenoliths from Harrat Uwayrid (Saudi Arabia). Lithos 106: 261–279


Marks MAW, Rudnick RL, Ludwig T, Marschall H, Zack T, Halama R, McDonough WF, Rost D, Wenzel T, Vicenzi EP, Savov IP, Altherr R, Markl G (2008) Sodic pyroxene and sodic amphibole as potential reference materials for in situ Lithium isotope determinations by SIMS. Geostandards and Geoanalytical Research 32: 295–310


Marschall HR, Altherr R, Kalt A, Ludwig T (2008) Detrital, metamorphic and metasomatic tourmaline in high-pressure metasediments from Syros (Greece): intra-grain boron isotope patterns determined by secondary-ion mass spectrometry. Contributions to Mineralogy and Petrology 155: 703–717


Rosner M, Wiedenbeck M, Ludwig T (2008) Composition-induced variations in SIMS instrumental mass fractionation during boron isotope ratio measurements of silicate glasses. Geostandards and Geoanalytical Research 32: 27–38


Vils F, Pelletier L, Kalt A, Müntener O, Ludwig T (2008) The lithium, boron and beryllium content of serpentinized peridotites from ODP Leg 209 (Sites 1272A and 1274A): Implications for lithium and boron budgets of oceanic lithosphere. Geochimica et Cosmochimica Acta 72: 5475–5504




Ertl A, Hughes JM, Prowatke S, Ludwig T, Brandstätter F, Körner W, Dyar MD (2007) Tetrahedrally coordinated boron in Li-bearing olenite from „mushroom“ tourmaline from Momeik, Myanmar. The Canadian Mineralogist 45: 891–899


Kaeser B, Kalt A, Ludwig T (2007) Li, Be, and B abundances in minerals of peridotite xenoliths from Marsabit (Kenya): Disequilibrium processes and implications for subduction zone signatures. Geochemistry Geophysics Geosystems 8: Q09013, doi:10.1029/2006GC001555


Ludwig T, Stalder R (2007) A new method to eliminate the influence of in situ contamination in SIMS analysis of hydrogen. Journal of Analytical Atomic Spectrometry 22: 1415–1419


Stalder R, Ludwig T (2007) OH incorporation in synthetic diopside. European Journal of Mineralogy 19: 373–380


Ertl A, Hughes JM, Prowatke S, Ludwig T, Prasad PSR, Brandstätter F, Körner W, Schuster R, Pertlik F, Marschall HR (2006) Tetrahedrally-coordinated boron in tourmalines from the liddicoatite-elbaite series from Madagascar: structure, chemistry and infrared spectroscopic studies. American Mineralogist 91: 1847–1856




Ertl A, Rossman GR, Hughes JM, Wang Y, O’Leary J, Dyar MD, Prowatke S, Ludwig T (2006) Elbaite from the Himalaya Mine, Mesa Grande, California. Gems & Gemology 42: 96


Jochum KP and 49 others (2006) MPI-DING reference glasses for in situ microanalysis: new reference values for element concentrations and isotope ratios. Geochemistry, Geophysics, Geosystems 7: Q02008, doi:10.1029/2005GC001060


Marschall HR, Altherr R, Ludwig T, Kalt A, Gméling K, Kasztovszky Z (2006) Partitioning and budget of Li, Be and B in high-pressure metamorphic rocks. Geochimica et Cosmochimica Acta 70: 4750–4769


Marschall HR, Ludwig T (2006) Re-examination of the boron isotopic composition of tourmaline from the Lavicky granite, Czech Republic, by secondary ion mass spectrometry: back to normal. Critical comment on "Chemical and boron isotopic compositions of tourmaline from the Lavicky leucogranite, Czech Republic" by S.-Y. Jiang et al., Geochemical Journal, 37, 545–556, 2003. Geochemical Journal 40: 631-638


Marschall HR, Ludwig T, Altherr R, Kalt A, Tonarini S (2006) Syros metamorphic tourmaline: Evidence for very high-δ11B fluids in subduction zones. Journal of Petrology 47: 1915–1942




Ertl A, Rossman GR, Hughes JM, Prowatke S, Ludwig T (2005) Mn-bearing „oxy-rossmanite“ with tetrahedrally-coordinated Al and B from Austria: structure, chemistry, and infrared and optical spectroscopic study. American Mineralogist 90: 481–487


Stalder R, Klemme S, Ludwig T, Skogby H (2005) Hydrogen incorporation in orthopyroxene: interaction of different trivalent cations. Contributions to Mineralogy and Petrology 150: 473–85


Tappert R, Stachel T, Harris JW, Muehlenbachs K, Ludwig T, Brey GP (2005) Diamonds from Jagersfontein (South Africa): messengers from the sublithospheric mantle. Contributions to Mineralogy and Petrology 150: 505–522


Tappert R, Stachel T, Harris JW, Muehlenbachs K, Ludwig T, Brey GP (2005) Subducting oceanic crust: The source of deep diamonds. Geology 33: 565–568




Altherr R, Topuz G, Marschall H, Zack T, Ludwig T (2004) Evolution of a tourmaline-bearing lawsonite eclogite form the Elekdag area (Central Pontides, N Turkey): evidence for infiltration of slab-derived B-rich fluids during exhumation. Contributions to Mineralogy and Petrology 148: 409–425


Ertl A, Pertlik F, Dyar MD, Prowatke S, Hughes JM, Ludwig T, Bernhardt H-J (2004) Fe-rich olenite with tetrahedrally coordinated Fe3+ from Eibenstein, Austria: Structural, chemical and Mössbauer data. The Canadian Mineralogist 42: 1057–1063


Ertl A, Schuster R, Prowatke S, Bandstätter F, Ludwig T, Bernhardt H-J, Koller F, Hughes JM (2004) Mn-rich tourmaline and fluoroapatite in a Variscan pegmatite from Eibenstein an der Thaya, Bohemian massif, Lower Austria. European Journal of Mineralogy 16: 551–560


Marschall HR, Ludwig T (2004) The low-boron contest: minimising surface contamination and analysing boron concentrations at the ng/g-level by secondary ion mass spectrometry. Mineralogy and Petrology 81: 265–278


Paquin J, Altherr R, Ludwig T (2004) Li-Be-B systematics in the ultrahigh-pressure garnet peridotite from Alpe Arami (Central Swiss Alps): implications for slab-to-mantle wedge transfer. Earth and Planetary Science Letters 218: 507–519




Woodland AB, Seitz H-M, Altherr R, Marschall H, Olker B, Ludwig T (2002) Li abundances in eclogite minerals: a clue to a crustal or mantle origin? Contributions to Mineralogy and Petrology 143: 587–601




Kalt A, Schreyer W, Ludwig T, Prowatke S, Bernhardt H-J, Ertl A (2001) Complete solid solution between magnesian schorl and lithian excess-boron olenite in a pegmatite from the Koralpe (eastern Alps, Austria). European Journal of Mineralogy 13: 1191–1205




Seitz H-M, Altherr R, Ludwig T (1999) Partitioning of transition elements between orthopyroxene and clinopyroxene in peridotitic and websteritic xenoliths: new empirical geothermometers. Geochimica et Cosmochimica Acta 63: 3967-3982




Kalt A, Altherr R, Ludwig T (1998) Contact metamorphism in pelitic rocks on the island of Kos (Greece, Eastern Aegean Sea): a test for the Na-in-cordierite thermometer. Journal of Petrology 39: 663–688


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Latest Revision: 2020-11-17
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