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

Dr. Andreas HertwigHertwig Kl



Institute of Earth Sciences

Ruprecht-Karls-Universität Heidelberg

Im Neuenheimer Feld 236

D-69120 Heidelberg

Room: 511
+49 6221 54-8209
+49 6221 54-4805 (secretariat)



Research interests and projects


  • High-pressure metamorphism and fluid-rock interactions at subduction zones (jadeitite genesis in the serpentinite mélanges of the Rio San Juan Complex, Dominican Republic)
    • Current project funded by DFG: “In-situ U-Pb age dating and the oxygen isotopic composition of accessory minerals in jadeitites: investigating the timing of fluid release and fluid-rock interactions in subduction zones.”
  • Early solar system evolution (oxygen isotope analysis and Al-Mg chronology of chondrules and Ca-Al-rich inclusions in chondrites by SIMS)
  • Dating of accessory minerals by SIMS (e.g., zircon in jadeitites, apatite in meteorites)
  • Stable isotope paleoclimate proxies
  • High resolution determination of isotope ratios in minerals and other solid matter by secondary ion mass spectrometry (SIMS)


Academic career and professional employment


Since 10/2020 Heidelberg University, Research Associate
07/2018-08/2020 University of California, Los Angeles, Post-doctoral researcher
11/2015-06/2018 University of Wisconsin-Madison, Post-doctoral researcher
2014 Ruhr-Universität Bochum, Dissertation (Dr. rer. nat.)
2010 Technische Universität Berlin, Diplom




2015 Ruth Massenberg-Preis (Annual award for the best thesis in the field of natural sciences defended at the Ruhr-University Bochum)



Current teaching


2020/21 Wintersemester:

  • Polarized-light microscopy (Lichtmikroskopie II, B. Sc.)






Fukuda, K., Tenner, T. J., Kimura, M., Tomioka, N., Siron, G., Ushikubo, T., Chaumard, N., Hertwig, A. T. & Kita, N. T. (2022). A temporal shift of chondrule generation from the inner to outer Solar System inferred from oxygen isotopes and Al-Mg chronology of chondrules from primitive CM and CO chondrites. Geochimica et Cosmochimica Acta, 322, 194-226. [DOI].


Salazar-Jaramillo, S., Śliwiński, M. G., Hertwig, A. T., Garzón, C. C., Gómez, C. F., Bonilla, G. E. & Guerrero, J. (2022). Changes in rainfall seasonality inferred from weathering and pedogenic trends in mid-Miocene paleosols of La Tatacoa, Colombia. Global and Planetary Change, 208, 103711.




Hertwig, A., Maresch, W. V. & Schertl, H.-P. (2021). Jadeitite and related rocks in serpentinite mélanges from the Rio San Juan Complex, Dominican Republic: evidence for both isochemical replacement and metasomatic desilication of igneous protoliths with fluid-assisted jadeite growth. Russian Geology and Geophysics, 62, 496-524.


Hertwig, A. T., Liu, M.-C., Brearley, A. J. & Simon, S. B. (2021). Petrographic and isotopic investigations of two unusual Ca-Al-rich inclusions from primitive CO3 chondrites. Geochimica et Cosmochimica Acta, 296, 75-96. DOI: 10.1016/j.gca.2020.12.014.


Chaumard, N., Defouilloy, C, Hertwig, A. T. & Kita, N. T. (2021). Oxygen isotope systematics of chondrules in the Paris CM2 chondrite: Indication for a single large formation region across snow line. Geochimica et Cosmochimica Acta, 299, 199-218. DOI: 10.1016/j.gca.2021.02.012.




Han, J., Keller, L. P., Liu, M.-C., Needham, A. W., Hertwig, A. T., Messenger, S. & Simon, J. I. (2020). A Coordinated Microstructural and Isotopic Study of a Wark-Lovering Rim on a Vigarano CAI. Geochimica et Cosmochimica Acta, 269, 639-660. DOI: 10.1016/j.gca.2019.10.042.


Borrelli, C., Gabitov, R., Liu, M.-C., Hertwig, A. T. & Panieri, G. (2020). The benthic foraminiferal δ34S records intensity and timing of paleo methane fluxes. Scientific Reports, 10, 1304. DOI: 10.1038/s41598-020-58353-4.




Schertl, H.-P., Hertwig, A. & Maresch, W. V. (2019). Cathodoluminescence Microscopy of Zircon in HP- and UHP-Metamorphic Rocks: A Fundamental Technique for Assessing the Problem of Inclusions versus Pseudo-Inclusions. Journal of Earth Science, 30, 1095-1107. DOI: 10.1007/s12583-019-1246-5.


Harlow, G. E., Berman, M. J., Cárdenas Párraga, J., Hertwig, A., García-Casco, A. & Gnivecki, P. L.  (2019). Pre-Columbian jadeitite artifacts from San Salvador Island, Bahamas and comparison with jades of the eastern Caribbean and jadeitites of the greater Caribbean region. Journal of Archaeological Science, 26, 101830. DOI: 10.1016/j.jasrep.2019.04.019.


Liu, M.-C., Han, J., Brearley, A. J. & Hertwig, A. T. (2019). Aluminum-26 chronology of dust coagulation and early solar system evolution. Science Advances, 5, eaaw3350. DOI: 10.1126/sciadv.aaw3350.


Hertwig, A. T., Kimura, M., Defouilloy, C. & Kita, N. T. (2019). Oxygen isotope systematics of chondrule olivine, pyroxene, and plagioclase in one of the most pristine CV3-Red chondrites (Northwest Africa 8613). Meteoritics & Planetary Science, 54, 2666-2685. DOI: 10.1111/maps.13379.


Hertwig, A. T., Kimura, M., Ushikubo, T., Defouilloy, C. & Kita, N. T. (2019). The 26Al-26Mg systematics of FeO-rich chondrules from Acfer 094: two chondrule generations distinct in age and oxygen isotope ratios. Geochimica et Cosmochimica Acta, 253, 111-126. DOI: 10.1016/j.gca.2019.02.020.




Hertwig, A. T., Defouilloy, C. & Kita, N. T. (2018). Formation of chondrules in a moderately high dust enriched disk: Evidence from oxygen isotopes of chondrules from the Kaba CV3 chondrite. Geochimica et Cosmochimica Acta, 224, 116-131. DOI: 10.1016/j.gca.2017.12.013.


Schertl, H.-P., Maresch, W. V., Knippenberg, S., Hertwig, A., López Belando, A., Rodríguez Ramos, R., Speich, L. & Hofman, C. (2018). Petrography, mineralogy and geochemistry of jadeite-rich artefacts from the Playa Grande excavation site, northern Hispaniola: evaluation of local provenance from the Río San Juan Complex. In: Geological Society, London, Special Publications, SP474.3. DOI: 10.1144/SP474.3.


Kawamoto, T., Hertwig, A., Schertl, H.-P. & Maresch, W. V. (2018). Fluid inclusions in jadeitite and jadeite-rich rock from serpentinite mélanges in northern Hispaniola: Trapped ambient fluids in a cold subduction channel. Lithos, 308-309, 227-241. DOI: 10.1016/j.lithos.2018.02.024.




Hertwig, A., McClelland, W. C., Kitajima, K., Schertl, H.-P., Maresch, W. V., Stanek, K., Valley, J. W. & Sergeev, S. A. (2016). Inherited igneous zircons in jadeitite predate high-pressure metamorphism and jadeitite formation in the Jagua Clara serpentinite mélange of the Rio San Juan Complex (Dominican Republic). Contributions to Mineralogy and Petrology, 171, 48. DOI: 10.1007/s00410016-1256-6.




Hertwig, A., Maresch, W. V., Schertl, H.-P., Draper, G., Abbott, R. N. & López Belando, A. (2015). Field Guidebook to the XI International Eclogite Conference, Rio San Juan, Dominican Republic.




Schertl, H.-P., Maresch, W. V., Stanek, K. P., Hertwig, A., Krebs, M., Baese, R. & Sergeev, S. A. (2012). New occurrences of jadeitite, jadeite quartzite and jadeite-lawsonite quartzite in the Dominican Republic, Hispaniola: petrological and geochronological overview. European Journal of Mineralogy, 24, 199-216. DOI: 10.1127/0935-1221/2012/0024-2201.


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Latest Revision: 2022-09-29
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