Hydrogeochemistry and Hydrogeology
Dr. rer. nat. Gerhard Schmidt
| Name: |
Gerhard Schmidt |
| Address: |
Institute of Earth Sciences |
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Ruprecht-Karls-University Heidelberg |
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Im Neuenheimer Feld 236, Room 219 |
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D-69120 Heidelberg |
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| Phone: |
+49 (0) 6221-545250
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E-Mail: |
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| https://www.researchgate.net/profile/Gerhard_Schmidt2 |
Research themes:
El Goresy A., Schmidt G. (2019) Discussion of ‘Rare metals on shatter cone surfaces from the Steinheim Basin (SW Germany) – remnants of the impacting body?’. Geological Magazine, 1-2. https://doi.org/10.1017/S001675681800064X
Schmidt G., El Goresy A., Pernicka E. Discussion on: “Possible traces of the impactor on fracture surfaces of shattered belemnites from the Nördlinger Ries crater (Southern Germany) and potential consequences for the classification of the Ries impactor“ by E. Buchner & M. Schmieder [Z. Dt. Ges. Geowiss., 168 (2) (2017), 245–262]-. Z. Dt. Ges. Geowiss., 168 (3) (2017). pp. 415-419. https://doi.org/10.1127/zdgg/2017/0139
Al Najem, S., Freundt, F. , Schmidt, G., Rheinberger, S., Kraml, M., Aeschbach, W., Isenbeck-Schröter, M. Salinization of shallow groundwater by a deep fluid ascending at the western main fault zone of the northern Upper Rhine Graben, Germany: Discussion of the origin and evolution using major and trace element compositions.- submitted to Applied Geochemistry
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Kraml, M., Eichstädter, R., Aeschbach, W. Ascending deep fluids into shallow aquifer at hydraulically active segments of the Western Boundary Fault of the northern Upper Rhine Graben, Germany: Constraints from 87Sr/86Sr ratios. Procedia Earth and Planetary Science (2017), pp. 81-84 http://dx.doi.org/10.1016/j.proeps.2016.12.001
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Kraml, M., Aeschbach, W. 87Sr/86Sr ratios in shallow and deep aquifers from the southern Upper Rhine Graben, Germany. Procedia Earth and Planetary Science (2017), pp. 626-629 http://dx.doi.org/10.1016/j.proeps.2016.12.168
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Kraml, M., Aeschbach, W. 87Sr/86Sr ratios in thermal water from the southern Upper Rhine Graben, Germany. Procedia Earth and Planetary Science (2017). pp. 364-367 http://dx.doi.org/10.1016/j.proeps.2016.12.092
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Kraml, M., Eichstädter, R., Aeschbach, W. 87Sr/86Sr ratios in shallow and deep aquifers and thermal water from the Eastern Boundary Fault of the northern Upper Rhine Graben at the Heidelberg Basin, Germany. Procedia Earth and Planetary Science (2017), pp. 108-111 http://dx.doi.org/10.1016/j.proeps.2016.12.017
Kraml, M., Jodocy, M., Reinecker, J., Leible, D., Freundt, F., Al Najem, S., Schmidt, G., Aeschbach, W., Isenbeck-Schröter, M. TRACE: Detection of Permeable Deep Reaching Fault Zone Sections in the Upper Rhine Graben, Germany, During Low Budget Isotope Geochemical Surface Exploration. European Geothermal Congress 2016, Paper Number: S-GC-98, Strasbourg, France https://www.geothermal-energy.org/pdf/IGAstandard/EGC/2016/EGC2016-S-GC-98.pdf
Isenbeck-Schröter, M., Aeschbach, W., Al Najem, S., Freundt, F., Schmidt, G. TRACE - TiefenReservoir-Analyse und Charakterisierung von der Erdoberfläche: Geochemisch-isotopisches Multimethoden-Konzept zur Charakterisierung tiefer Aquifere im Gebiet des Oberrheingrabens, Abschlussbericht TRACE Teil B. Technische Informationsbibliothek Hannover (2016) 95 S. DOI: 10.2314/GBV:871282461
Schmidt, G. Are high-temperature fractionations in the solar nebula preserved in highly siderophile element systematics of the Earth mantle? Meteoritics and Planetary Science 39, (2004) 1995-2007. http://onlinelibrary.wiley.com/doi/10.1111/j.1945-5100.2004.tb00092.x/abstract
Schmidt, G., Witt-Eickschen, G., Palme, H., Seck, H., Spettel, B., Kratz, K.-L. Highly siderophile elements (PGE, Re and Au) in mantle xenoliths from the West Eifel volcanic field (Germany). Chemical Geology 196, (2003) 77-105. http://www.sciencedirect.com/science/article/pii/S0009254102004084
Schmidt, G., Snow, J. Os isotopes in mantle xenoliths from the Eifel volcanic field and the Vogelsberg (Germany): age constraints on the lithospheric mantle. Contributions to Mineralogy and Petrology 143, (2002) 694-705. http://link.springer.com/article/10.1007%2Fs00410-002-0372-7
Snow, J.E., Schmidt, G., Rampone, E. Os isotopes and highly siderophile elements (HSE) in the Ligurian ophiolites, Italy. Earth and Planetary Science Letters 175, (2000) 119-132. http://www.sciencedirect.com/science/article/pii/S0012821X99002800
Lorand, J.P., Schmidt, G., Palme, H., Kratz, K.-L. Highly siderophile element geochemistry of the Earth`s mantle: new data for the Lanzo (Italy) and Ronda (Spain) orogenic peridotite bodies. Lithos 53, (2000) 149-164. http://www.sciencedirect.com/science/article/pii/S0024493700000177
Schmidt, G., Palme, H., Kratz, K.-L., Kurat G. Are highly siderophile elements (PGE, Re and Au) fractionated in the upper mantle of the earth? New results on peridotites from Zabargad. Chemical Geology 163, (2000) 167-188. http://www.kurat.at/pdf/346.pdf http://www.sciencedirect.com/science/article/pii/S0009254199001369
Snow, J.E., Schmidt G. Proterozoic melting in the northern peridotite Massif
Snow, J.E., Schmidt, G. Constraints on the Earth accretion deduced from noble metals in the oceanic mantle. Nature 391, (1998) 166-169. http://www.nature.com/nature/journal/v391/n6663/full/391166a0.html
Schmidt, G., Palme, H., Kratz, K.-L. Highly siderophile elements (Re, Os, Ir, Ru, Rh, Pd, Au) in impact melts from three European craters (Sääksjärvi, Mien and Dellen): clues to the nature of the impacting bodies. Geochimica et Cosmochimica Acta 61, (1997) 2977-2987. http://www.sciencedirect.com/science/article/pii/S0016703797001294
Schmidt, G. Clues to the nature of the impacting bodies from platinum-group elements (rhenium and gold) in borehole samples from the Clearwater East crater (Canada) and the Boltysh impact crater (
Heinrich, E., Schmidt, G., Kratz, K.-L. Determination of Platinum-Group Elements (PGE) from Catalytic Converters in Soil by Means of Docimasy and INAA. Analytical and Bioanalytical Chemistry 354 (bis Dezember 2001 Fresenius Z. Anal. Chem.) (1996) 883-885. http://link.springer.com/article/10.1007/s0021663540883
Schmidt, G., Pernicka, E. The determination of platinum group elements (PGE) in target rocks and fall-back material of the Nördlinger Ries impact crater (Germany). Geochim. Cosmochim. Acta 58 (1994) 5083-5090. http://www.sciencedirect.com/science/article/pii/001670379490233X
Schmidt, G., Zhou, L., Wasson, J. T. Iridium anomaly associated with the Australasian tektite-producing impact: Masses of the impactor and of the Australasian tektites. Geochim. Cosmochim. Acta 57 (1993) 4851-4859. http://www.sciencedirect.com/science/article/pii/001670379390204A
Schmidt, G., Zhou, L., Wasson, J. T. (1993): Concentrations of tektites and chemical elements in sediments from ODP Holes 121-758B and 124-769A. PANGAEA https://doi.org/10.1594/PANGAEA.707906
Hess, J.C., Schmidt, G. Zur Altersstellung der Kataklasite im Bereich der Otzberg-Zone, Odenwald. Geol. Jb. Hessen, Wiesbaden (1989) 117, 69-77. http://www10.hlug.de/fileadmin/shop/pics/schriften/Schriften_Geologie_137.pdf
Conference Paper and Talks
Schmidt, G. Rhodium - a key element in geo- and cosmochemistry. 17th Rußbach School on Nuclear Astrophysics, 15-21 March 2020,
Rußbach am Paß Gschütt, Austria
Schmidt, G. Rhodium - a long ignored element in cosmo- and geochemistry. 51st Lunar and Planetary Science Conference, The Woodlands, Texas, March 16–20, 2020
Schmidt G. Diagnostic element ratios for detecting projectiles in impact craters. Kolloquiumsvortrag Georg-August-Universität Göttingen, Institut für Geo-und Umweltnaturwissenschaften, Wintersemester 2019/2020, invited lecture, 6. November 2019
Schmidt, G. (2019) Ru/Rh and Ir/Rh as diagnostic mass ratios for the identification of specific impactor compositions of terrestrial impact craters. Paneth Kolloquium, Nördlingen (Germany), October 29-31, 2019 http://www.paneth.eu/PanethKolloquium/2019/0009.pdf (abstract #0009)
Schmidt, G. Distinguishing different types of projectiles from terrestrial impact craters – Clearwater East (Canada) and Rochechouart (France) re-investigated. Large Meteorite Impacts and Planetary Evolution VI, September 30 - October 03, 2019, University of Brasília, Brazil
Schmidt, G. Re-investigation of specific impactor compositions from terrestrial impact craters (Clearwater East, Brent, Wanapitei, Greenland, Popigai, Rochechouart, Boltysh). Geomünster2019, 22–25 September 2019, Münster
Schmidt, G. Re-investigation of projectile types from terrestrial impact craters – Hiawatha (Greenland), Popigai (Siberia), Clearwater East, Brent, Wanapitei (Canada), Gardnos (Norway), Rochechouart (France), Ries (Germany).- EPSC-DPS Joint Meeting 2019, 15-20 Sept., Geneva, Switzerland https://www.epsc-dps2019.eu/home.html
Schmidt, G. Re-investigation of specific impactor compositions from terrestrial impact craters by the diagnostic element ratios Ru/Rh and Ir/Rh. 82nd Annual Meeting of the Meteoritical Society, 7-12 Juli 2019, Sapporo, Japan. https://www.hou.usra.edu/meetings/metsoc2019/pdf/6026.pdf Program: https://www.hou.usra.edu/meetings/metsoc2019/pdf/metsoc2019_program.htm#sess405
Schmidt, G. Neutrons for Cosmochemistry - Identification of impacting asteroids. 16th Rußbach School on Nuclear
Astrophysics 2019, March 10 - 16, 2019, Rußbach, Austria. https://indico.ph.tum.de/event/4158/overview
Schmidt, G. Misleading projectile determination by Cr/Ni and Ni/Co ratios of Australasian microtektites and impact melt rocks. European Planetary Science Congress, September 16 – 21, 2018, Berlin.
Schmidt, G., Pernicka, E. Fractionated Os/Ir ratios in ophiolitic serpentinites from the eastern Central Alps (Switzerland) and the Valmalenco (Italy). 28th Annual V. M. Goldschmidt Conference, August 12 – 17, 2018, Boston.
Schmidt, G., El Goresy, A., Palme, H. Extraterrestrial platinum group elements in impactites and misleading Ni/Cr, Ni/Co, and Cr/Co element ratios for projectile identification. 81th Annual Meeting of the Meteoritical Society, July 22 – 27, 2018, Moscow.
Schmidt, G. Fault-controlled fluid ascent at hydraulically active segments of the Rhine Graben: Clues from trace elements and isotopic tracers in near- surface ground water. Colloquium Soil-Water-Rock, Albert-Ludwigs-Universität, Institut für Geo- und Umweltnaturwissenschaften, 28. Juni 2018, Freiburg.
Isenbeck-Schröter, M., Al Najem, S., Belafi, V., Ritter, S., Schmidt, G. Geochemische und isotopengeochemische Charakterisierung quartärer Grundwässer des Oberrheingrabens zur Identifizierung von Tiefenwassereinflüssen. Grundwasser im Umfeld von Bergbau, Energie und urbanen Räumen - 26. Tagung der Fachsektion Hydrogeologie e. V. in der DGGV e.V. 21. - 24. März 2018, Ruhr-Universität Bochum. – oral presentation 23.03.2018 http://www.bayceer.uni-bayreuth.de/FH-DGGV-2018/de/prog/bayconf/beitrag_detail.php?id_obj=15178
Schmidt, G., El Goresy, A., Pernicka, E. The hydrothermal system at the Ries impact structure and meteoritic matter from the Ries and Steinheim impactors? Universität Heidelberg, 26.Oktober 2017 (Vortrag)
Schmidt G., El Goresy A., Pernicka E. (2017): Meteoritic matter from the Ries and Steinheim impactors? Paneth-Kolloquium 2017, Nördlingen, oral presentation 12.10.2017
Schmidt, G., El Goresy, A., Pernicka, E. (2017) Meteoritic matter from the Ries and Steinheim impactors? Paneth Kolloquium, Nördlingen (Germany), abstract URL: http://www.paneth.eu/PanethKolloquium/2017/0070.pdf (abstract #0070)
Schmidt, G. Ascending deep fluids into shallow aquifer at hydraulically active segments of the Western Boundary Fault of the Rhine Graben, Germany. Vortrag am Department of Mining Engineering, GIS-Remote Sensing, Sahid Bahonar University of Kerman (SBUK), Iran. – oral presentation 13.05.2017
Schmidt, G. Impact crater in Europe. Vortrag am Department of Mining Engineering, GIS-Remote Sensing, Sahid Bahonar University of Kerman (SBUK), Iran. – oral presentation 13.05.2017.
Kraml, M., Jodocy, M., Freundt, F., Schmidt, G., Al Najem, S., Reinecker, J., Kreuter, H., Aeschbach, W., Isenbeck-Schröter, M. Ergebnisse des Forschungsprojekts TRACE zur Senkung des Fündigkeitsrisikos. Geothermie Kongress 2016, 29. Nov. - 01. Dez., Essen, Vortrag zum Thema „Verminderung des Fündigkeitsrisikos“ am 30.11.2016 http://www.geothermie.de/aktuelles/der-geothermiekongress-2016.html
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Kraml, M., Eichstädter, R., Aeschbach, W. Ascending deep fluids into shallow aquifer at hydraulically active segments of the Western Boundary Fault of the northern Upper Rhine Graben, Germany: Constraints from 87Sr/86Sr ratios. 15th Water-Rock Interaction International Symposium, WRI-15, 16 to 21 October 2016, Évora, Portugal. – oral presentation 20.10.2016, http://wri15portugal.org/
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Kraml, M., Aeschbach, W. 87Sr/86Sr ratios in shallow and deep aquifers from the southern Upper Rhine Graben, Germany. 15th Water-Rock Interaction International Symposium, WRI-15, 16 to 21 October 2016, Évora, Portugal. – E-Poster presentation 20.10.2016
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Kraml, M., Aeschbach, W. 87Sr/86Sr ratios in thermal water from the southern Upper Rhine Graben, Germany. 15th Water-Rock Interaction International Symposium, WRI-15, 16 to 21 October 2016, Évora, Portugal. – E-Poster presentation 20.10.2016
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Kraml, M., Eichstädter, R., Aeschbach, W. 87Sr/86Sr ratios in shallow and deep aquifers and thermal water from the Eastern Boundary Fault of the northern Upper Rhine Graben at the Heidelberg Basin, Germany. 15th Water-Rock Interaction International Symposium, WRI-15, 16 to 21 October 2016, Évora, Portugal. – E-Poster presentation 20.10.2016
Kraml, M., Jodocy, M., Reinecker, J., Leible, D., Freundt, F., Al Najem, S., Schmidt, G., Aeschbach-Hertig, W., Isenbeck-Schröter, M. TRACE: Detection of permeable sections of deep reaching fault zones using a low budget isotope-geochemical surface exploration method in the Upper Rhine Graben, Germany. European Geothermal Congress, 19-24 Sept 2016, Strasbourg, France (2016). (Vortrag 20. Sept. 2016) http://europeangeothermalcongress.eu/agenda/list-of-papers/
Freundt, F., Al Najem, S., Aeschbach-Hertig, W., Isenbeck-Schröter, M., Schmidt, G., Kraml, M., Geothermal exploration using He isotopes in shallow aquifers of the Upper Rhine Graben. In 7th German-Brazilian Symposium, Heidelberg, Oktober 04 - 10. 2015. (Vortrag) http://www.geow.uni-heidelberg.de/md/chemgeo/geow/tagung/SBA-DBS/abstract-book_sba-dbs.pdf
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Aeschbach-Hertig, W., Kraml, M., 87Sr/86Sr systematics and Li of shallow groundwaters and springs at the western main fault of the northern Upper Rhine Graben. 25th Annual V. M. Goldschmidt Conference, Prag, August 16 - 21. 2015. http://goldschmidt.info/2015/uploads/abstracts/origPDFs/3367.pdf (Vortrag)
Freundt, F., Al Najem, S., Aeschbach-Hertig, W., Isenbeck-Schröter, M., Schmidt, G., Kraml, M., Application of helium isotopes in shallow groundwater for geothermal exploration in the Upper Rhine Graben. 25th Annual V. M. Goldschmidt Conference, Prag, August 16 - 21. 2015. http://goldschmidt.info/2015/uploads/abstracts/origPDFs/2109.pdf (Poster)
Schmidt, G., Al Najem, S., Isenbeck-Schröter, H.-M. Seitz, N. Gaspers, M., Freundt, F., Aeschbach-Hertig, W., Kraml, M., Hochfraktionierte Lithium-Isotopenverhältnisse (negative δ7Li-Werte) in Grundwässern und Mineralquellen der westlichen Grabenrandstörungszone des nördlichen Oberrheingrabens. Forschungsseminar Universität Heidelberg, 5. Mai 2015 (Vortrag) http://www.geow.uni-heidelberg.de/veranstaltungen/forschungsseminar.html
Freundt, F., Al Najem, S., Schmidt, G., Aeschbach-Hertig, W., Isenbeck-Schröter, M., Kraml, M. The role of shallow ground water 3He/4He ratios in geothermal energy potential and fault zone characterization. Frühjahrstagung der Deutschen Physikalischen Gesellschaft e. V., Heidelberg 2015, 23.-27. März 2015. http://www.dpg-verhandlungen.de/year/2015/conference/heidelberg/part/up/session/10/contribution/1
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Aeschbach-Hertig, W., Kraml, M., Grobe, R., 87Sr/86Sr-Isotopenverhältnisse und Spurenelemente in Grundwässern des nördlichen Oberrheingraben. Institut für Umweltphysik, Universität Heidelberg. 27.10.2014 (Vortrag)
Kraml, M., Freundt, F., Schmidt, G., Al Najem, S., Aeschbach-Hertig, W., Isenbeck-Schröter, M., Grobe, R., Trace – Tiefenreservoir Analyse und Charakterisierung von der Erdoberfläche – Forschungsprojekt zur Detektion von permeablen tiefreichenden Störungszonen im Oberrheingraben. 9. Tiefengeothermie-Forum am 30. September 2014 an der Technischen Universität Darmstadt http://hessenenergie.de/Downloads/Dl-Nach/dln-tgf/tgf-14/tgf-14-pdfs/05_Kraml_140930.pdf
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Aeschbach-Hertig, W., Grobe, R., Kraml, M., 2014. Detection of ascending fluids in shallow groundwater at the western marginal fault of the northern Upper Rhine Graben, Germany: Constraints from 87Sr/86Sr isotopic ratios and trace elements. Schriftenreihe der Deutschen Gesellschaft für Geowissenschaften, Heft 85, S. 559 – 560. GeoFrankfurt 2014, Goethe Universität Frankfurt a.M., 21.-24. September 2014 (Vortrag)
Freundt, F., Al Najem, S., Aeschbach-Hertig, W., Isenbeck-Schröter, M., Schmidt, G., Grobe, R., Kraml, M., A multi-tracer approach for the exploration of deep geothermal energy potential and fault zone characterisation, applied in the Upper Rhine Graben. Geophysical Research Abstracts, Vol. 16, EGU2014-13059, 2014, EGU General Assembly 2014 http://meetingorganizer.copernicus.org/EGU2014/EGU2014-13059.pdf
Schmidt, G., Al Najem, S., Isenbeck-Schröter, M., Freundt, F., Aeschbach-Hertig, W., Kraml, M., Grobe, R., 87Sr/86Sr-Isotopenverhältnisse in Grundwässern des nördlichen Oberrheingraben, Workshop TRACE –TiefenReservoir-Analyse und Charakterisierung von der Erdoberfläche, FKZ: 0325390, Institut für Geowissenschaften, Universität Heidelberg, 23.05.2014 (Vortrag)
Schmidt, G., Impact crater in Europe. Paneth-Kolloquium 2010, October 2010, Nördlingen http://www.paneth.eu/PanethKolloquium/Archive_files/PanethKolloquium_2010.pdf
Schmidt, G., Impact as a geological process in the context of solar system and planetary evolution. European Planetary Science Congress 2010, Pontifical University of Saint Thomas Aquinas 19 – 24 September 2010, Rome http://meetingorganizer.copernicus.org/EPSC2010/EPSC2010-164-1.pdf
Schmidt, G., Formation of terrestrial planets. The 20th General Meeting of the International Mineralogical Association 2010, Budapest.
Schmidt, G., Nature of Earth. 73rd Annual Meeting of the Meteoritical Society, 2010, New York, #5022, A182. http://www.lpi.usra.edu/meetings/metsoc2010/pdf/5022.pdf http://onlinelibrary.wiley.com/doi/10.1111/j.1945-5100.2010.01051.x/pdf
Schmidt, G., Kratz, K.-L. Impact cratering as a major process in the evolution of planetary surfaces: Projectile identification of meteorite craters. Eos Trans. American Geophysical Union, 90(52), Fall Meet. Suppl., Abstract, 2009, San Francisco. http://adsabs.harvard.edu/abs/2009AGUFMMR13B1679S
Schmidt, G. Refractory Element Fractionation (Os/Ir, Rh/Ir, Ru/Os) in Impact Craters: Projectile Identification of Rochechouart, Sääksjärvi, Boltysh, Dellen, Mien, etc. 72th Annual Meeting of the Meteoritical Society,
Schmidt, G. Schmuck aus dem Kosmos? Herkunftsbestimmung von Metallen. Starkenburgsternwarte Heppenheim, 10.03.2009
Schmidt, G. Planet Formation in the Inner Solar System: Origin and Nature of Impacting Projectiles. Workshop on Planet Formation and Evolution: The Solar System and Extra Solar Planets, Tübingen, 2nd to 6th March 2009. http://www.tat.physik.uni-tuebingen.de/~fgp/Conf09/programme.html
Schmidt, G. The nature of impacting projectiles on Earth, Moon and Mars. Paneth-Kolloquium, Nördlingen, 30.-31. Okt. 2008. http://www.cosmochemistry.org http://www.paneth.eu/PanethKolloquium/Archive_files/PanethKolloquium_2008.pdf
Schmidt G. The influence of impactors on the chemical composition of Earth and Mars. European Planetary Science Congress, Münster, Vol. 3, EPSC2008-A-0054, Sept. 21– Sept. 26, 2008. http://www.europlanet-eu.org
Schmidt, G. The influence of impactors on the chemical composition of Earth and Mars. 71th Annual Meeting of the Meteoritical Society, Matsue, Japan, July 27– August 1, 2008. http://www.lpi.usra.edu/meetings/metsoc2008/pdf/5001.pdf
Schmidt, G. Chemischer Spurennachweis von Asteroideneinschlägen: Forschungsergebnisse von Mond, Mars und Erde. Starkenburgsternwarte Heppenheim, 16.10.2007
Schmidt, G. Influence of impactors on the chemical composition of the Earth. In 17th Annual V. M. Goldschmidt Conference, Cologne, Germany, A896, August 19 - 24, 2007. http://goldschmidt.info/2007/abstract_volume.pdf
Schmidt, G. Highly siderophile elements in Earth and Mars. In Meteoritics and Planetary Science,
Schmidt, G. Comparison of highly siderophile elements between Earth and Mars. In Seventh International Conference on Mars, Pasadena, California Institute of Technology (Caltech), USA, July 9–13, #3020, 2007. http://www.lpi.usra.edu/meetings/7thmars2007/pdf/3020.pdf
Schmidt, G. Kosmische Bomben: Kollisionen in unserem Sonnensystem und deren chemischer Spurennachweis. Martin-Luther-Gymnasium Rimbach, MLS-Forum, 13.06.2007
Schmidt, G. Estimated mass of iron meteorites contributing to highly siderophile element and Ni inventory of the Earth crust. Lunar and Planet. Sci. Conf. XXXVIII, 1214-1215, 2007. http://www.lpi.usra.edu/meetings/lpsc2007/pdf/1214.pdf
Schmidt, G. Estimated mass of iron meteorites in the Earth upper continental crust. In 21. Seminar Aktivierungsanalyse und Gammaspektroskopie (SAAGAS 21), Mainz, 21-23 März 2007. http://www.kernchemie.uni-mainz.de/eng/460.php
Schmidt, G. Are there Cosmochemical Fingerprints in the Earth Upper Crust? Eos Trans. AGU 87(52), Fall Meet. Suppl., Abstract V33A-0641, 2006. http://adsabs.harvard.edu/abs/2006AGUFM.V33A0641S
Schmidt, G. Kosmochemische „Fingerabdrücke“ in Gesteinen: Neutronenaktivierungsanalysen zur Herkunftsbestimmung der seltenen Elemente Os, Ir, Ru, Pt, Rh und Pd. Seminarvortrag am Institut für Radiochemie (RCM), Technische Universität München (TUM), Garching, 24.10.2006.
Schmidt, G. Processing of the Earth’s Upper Continental Crust by Impacts of Magmatic Iron Meteorites and/or Pallasites: Evidence from HSE and Ni? In Workshop on Early Planetary Differentiation, p. 89-90. LPI Contribution No. 1335, Lunar and Planetary Institute,
Schmidt, G. Os, Ir, Ru, Pt, Rh, and Pd in Earth’s crust, mantle and moon. In 16th Annual V. M. Goldschmidt Conference,
Schmidt, G. Comparison of HSE in Earth and Moon. Meteoritics and Planetary Science Conference, ETH Zürich, 06. -11. Aug. 2006, Abstract #5023. http://www.lpi.usra.edu/meetings/metsoc2006/pdf/5023.pdf
Schmidt, G. Neutron activation of Os, Ir, Ru, Pt, Rh, and Pd in planetary materials. In Neutrons for Geoscience, Technische Universität München, Forschungsneutronenquelle Heinz Maier Leibnitz (FRM II), Garching 14. July 2006. (Vortrag) http://www.frm2.tum.de/fileadmin/w00bnv/www/_migrated_content_uploads/Geoscience_FRM-II_14.07.2006.pdf
Schmidt, G., Palme H., Kratz K.-L. Chemical evidence for a post-accretionary bombardement on Earth? Paneth-Kolloquium, Nördlingen, 12.-14. Okt. 2005. http://www.uni-koeln.de/math-nat-fak/mineral/kosmo/PC2005.pdf
Schmidt, G., Palme H., Kratz K.-L. Evidence of a magmatic crystallisation process in the Earth's upper continental crust? Berichte der Deutschen Mineralogischen Gesellschaft, Beih. z. Eur. J. Mineral. Vol. 17, No. 1, 119 (2005). https://www.schweizerbart.de/publications/detail/artno/147011721/Berichte_d_Deutschen_Mineral_Gesellsch
Schmidt G., Palme H., Kratz K.-L. Chemical Evidence of Asteroidal Fragments (Iron Meteorites and/or Pallasites) in the Earth's Upper Continental Crust? Meteoritics and Planetary Science 40, No. 9, Supplement, A135 (2005). http://www.lpi.usra.edu/meetings/metsoc2005/pdf/5015.pdf
Schmidt, G., Kratz K.-L. Kosmochemische Fingerabdrücke im Erdmantel: Ein Beitrag zur Herkunft der chemischen Elemente Os Ir, Ru, Pt, Rh, und Pd. Inst. f. Kernchemie, Jahresbericht (2004), ISSN 0932-7622 (2005). http://www.kernchemie.uni-mainz.de/downloads/jb2004/a21.pdf
Schmidt, G., Kratz K.-L. High-temperature fractionations in the solar nebula. Inst. f. Kernchemie, Jahresbericht (2004), ISSN 0932-7622 (2005). http://www.kernchemie.uni-mainz.de/downloads/jb2004/a20.pdf
Schmidt, G., Kratz K.-L. Cosmochemical fractionations and/or Astrophysical Effects in Planetary Materials. In Workshop on Chondrites and the Protoplanetary Disk. Abstract #9018, LPI Contribution, (2004). http://www.lpi.usra.edu/meetings/chondrites2004/pdf/9017.pdf
Schmidt, G. Highly fractionated materials from the Inner Solar System: Evidence from the Earth. In Workshop on Chondrites and the Protoplanetary Disk. Abstract #9018, LPI Contribution, (2004). http://www.lpi.usra.edu/meetings/chondrites2004/pdf/9018.pdf
Schmidt, G. Comparison of highly siderophile element data in Earth’s upper mantle derived by different analytical methods. Inst. f. Kernchemie, Jahresbericht (2003), ISSN 0932-7622 (2004). http://www.kernchemie.uni-mainz.de/downloads/jb2003/a22.pdf
Schmidt, G., Spettel B., Palme H., Kratz K.-L. Haupt- und Spurenelemente von Mantelgesteinsauswürflingen aus der West-Eifel. Inst. f. Kernchemie, Jahresbericht (2003), ISSN 0932-7622 (2004). http://www.kernchemie.uni-mainz.de/downloads/jb2003/a21.pdf
Schmidt, G., Palme H., Kratz K.-L., Spettel B., Nachweis von Os, Ir, Ru, Rh, Pt, Pd, Re und Au in Harzburgit- und Lherzolith-Xenolithen. Inst. f. Kernchemie, Jahresbericht (2003), ISSN 0932-7622 (2004). http://www.kernchemie.uni-mainz.de/downloads/jb2003/a20.pdf
Schmidt, G., Spettel B., Palme H., Kratz K.-L. Experimente zur Messung von As und Sb im unteren ng/g-Bereich in Mantelgesteinen. Inst. f. Kernchemie, Jahresbericht (2003), ISSN 0932-7622 (2004). http://www.kernchemie.uni-mainz.de/downloads/jb2003/a19.pdf
Schmidt, G. Abundances of Re, Os, Ir, Ru, Rh, Pt, Pd and Au in Earth's primitive upper mantle. Berichte der Deutschen Mineralogischen Gesellschaft, Beih. z. Eur. J. Mineral. Vol. 15, No. 1, 177 (2003). https://www.schweizerbart.de/publications/detail/artno/147011521/Berichte_d_Deutschen_Mineral_Gesellsch
Schmidt, G. High-temperature fractionations in the solar nebular preserved in highly siderophile element systematics of the Earth mantle. Workshop on Cometary Dust in Astrophysics. Abstract #6029, LPI Contribution No. 1182, 67 (2003). http://www.lpi.usra.edu/meetings/stardust2003/
Schmidt, G. Composition of the late influx of the Earth. In Third International Conference on Large Meteorite Impacts. Abstract #4006, Lunar and Planetary Institute, Houston (CD-ROM) (2003). http://www.lpi.usra.edu/meetings/largeimpacts2003/pdf/4006.pdf
Schmidt, G. Composition of the late influx of the Earth. Meteoritics and Planetary Science 38, Nr 7, Supplement, A18 (2003). http://www.lpi.usra.edu/meetings/metsoc2003/pdf/5009.pdf
Schmidt, G., Spettel B., Palme H. Arsenic and Sb abundances in the Earth mantle. In Lunar and Planet. Sci. XXXIV, Abstract #1581, Lunar and Planetary Institute, Houston (CD-ROM), (2003). http://www.mpic.mpg.de/3625125/Publications?page=188
Schmidt, G., Spettel B., Palme H., Kratz K.-L. Geochemistry of As and Sb: Constraints on fluid metasomatism in mantle xenoliths. Inst. f. Kernchemie, Jahresbericht (2002), ISSN 0932-7622 (2003). http://www.kernchemie.uni-mainz.de/downloads/jb2002/a23.pdf
Schmidt, G., Highly siderophile elements in Earth’s upper mantle: Composition of the late influx. Inst. f. Kernchemie, Jahresbericht (2002), ISSN 0932-7622 (2003). http://www.kernchemie.uni-mainz.de/downloads/jb2002/a22.pdf
Schmidt, G., Witt-Eickschen G., Palme H., Seck H., Snow J., Spettel B., Kratz K.-L. Redistribution of Platinum Group Elements in mantle xenoliths from the Eifel. Inst. f. Kernchemie, Jahresbericht (2002), ISSN 0932-7622 (2003). http://www.kernchemie.uni-mainz.de/downloads/jb2002/a24.pdf
Schmidt, G., Snow J., Witt-Eickschen G., Palme H., Seck H., Spettel B., Hofmann A.W., Kratz K.-L. Mantle xenoliths from the West Eifel volcanic field and Vogelsberg volcano (Germany) - Behaviour of HSE during mantle metasomatism and age constraints on lithospheric mantle In Highly siderophile elements in terrestrial and meteoritic samples: implications for planetary differentiation and igneous processes, WORKSHOP, Nancy, August 26 - 28 (2002) 58. http://www.crpg.cnrs-nancy.fr/NEWS/HSE-2002/program-gb.html
Schmidt, G., Palme H., Kurat G., Kratz K.-L. Melt percolation in mantle xenoliths from Lanzarote (Eastern Canary Islands): Evidence from highly siderophile elements. Inst. f. Kernchemie, Jahresbericht (2001), ISSN 0932-7622 (2002). http://www.kernchemie.uni-mainz.de/downloads/jb2001/a19.pdf
Schmidt, G., Spettel B., Palme H., Kratz K.-L. HSE abundances in mantle xenoliths from the Eifel volcanic field: Constraints on melt-rock reaction. Inst. f. Kernchemie, Jahresbericht (2001), ISSN 0932-7622 (2002). http://www.kernchemie.uni-mainz.de/downloads/jb2001/a20.pdf
Schmidt, G., Snow J.E. Os isotopes in geochemical reference materials and mantle xenoliths from the Eifel volcanic field and the Vogelsberg. Inst. f. Kernchemie, Jahresbericht (2001), ISSN 0932-7622 (2002). http://www.kernchemie.uni-mainz.de/downloads/jb2001/a21.pdf
Schmidt, G., Snow J., Palme H. Highly siderophile elements and Os Isotopes in mantle xenoliths from the Eifel volcanic field and the Vogelsberg volcano (Germany) Eos Trans. AGU, 82 (47), Fall Meet. Suppl. (2001) http://adsabs.harvard.edu/abs/2001AGUFM.V22A1009S
Schmidt, G., Snow J., Palme H., Seck H.A., Witt-Eickschen G., Spettel B., Kratz K.-L., Hofmann A.W. Os-Isotopie, Platinmetalle, Re und Au in Eifel-Xenolithen. Abstract zum Eifel-Workshop, Institut für Geophysik, Universität Göttingen (2001)
Schmidt, G., Snow J.E. Os isotopes in xenoliths from the Eife
Schmidt, G., Spettel B., Palme H., Kratz K.-L. Determination of major and trace elements in mantle xenoliths from the Eifel volcanic field by instrumental neutron activation. Inst. f. Kernchemie, Jahresbericht (2000), ISSN 0932-7622 (2001), A13. http://www.kernchemie.uni-mainz.de/downloads/jb2000/a13_gschmidt.pdf
Schmidt, G., Snow J., Palme H., Witt-Eickschen G., Hofmann A.W., Kratz K.-L. Highly Siderophile Elements (PGE, Re and Au) and Os Isotopes in Xenoliths from the Eifel Volcanic Field and the Vogelsberg. Inst. f. Kernchemie, Jahresbericht (2000), ISSN 0932-7622 (2001), A14. http://www.kernchemie.uni-mainz.de/downloads/jb2000/a14_gschmidt.pdf
Snow J., Schmidt G. Metasomatic effects on Os isotopes in mantle xenoliths from the Eifel volcanic field. Eos Trans. American Geophysical Union, 81(48), Fall Meet. Suppl., Abstract V11C-12, 2000
Schmidt, G., Lorand J.-P., Palme H., Kratz K.-L. Non-Chondritic Ratios of Os, Re, Ir, Ru, Rh, Pd and Au in Orogenic Lherzolites from Lanzo (Italy) and Ronda (
Schmidt, G., Ionov, D. A., Palme H., Kratz K.-L. Spinel Lherzolite Xenoliths from Mongolia; PGE, Re and Au Geochemistry. Inst. f. Kernchemie, Jahresbericht (1999), ISSN 0932-7622 (2000), 23. http://www.kernchemie.uni-mainz.de/downloads/jb1999/a22.pdf
Schmidt, G., Ionov D. A. Spinel Lherzolite and Garnet Lherzolitic Xenoliths from the Vitim Volcanic Field, Baikal Region, Siberia; Subchondritic Os/Ir Ratios. Inst. f. Kernchemie, Jahresbericht (1999), ISSN 0932-7622 (2000), 24. http://www.kernchemie.uni-mainz.de/downloads/jb1999/a23.pdf
Schmidt, G., Snow, J.E., Niu Y, Hékinian R. Extreme melt depletion and PGE fractionation at the Garrett Fracture Zone, East Pacific Rise. Inst. f. Kernchemie, Jahresbericht (1998), ISSN 0932-7622 (1999), 26.
Schmidt, G., Kratz K.-L., Palme H., Snow J. Constraints on Earth Accretion from Fractionation of Highly Siderophile Elements (HSE). 217th American Chemical Society National Meeting, Division of Nuclear Chemistry, Anaheim, CA, 147 (1999)
Schmidt, G., Snow J.E., Niu Y, Hékinian R. PGE Fractionation in Highly Depleted Oceanic Harzburgites, East Pacific Rise. Eos Trans. American Geophysical Union, Fall Meet. Suppl., 79 (1998).
Schmidt, G., Palme H. Fractionation of Highly Siderophile Elements (HSE) in Earth's Upper Continental Crust. Eos Trans. American Geophysical Union, Fall Meet. Suppl. (1998) 354.
Palme H., Borisov A., Holzheid A., Schmidt G. Origin and significance of highly siderophile elements in the upper mantle of the Earth. Mineralogical Magazine 62 A: 1127-1128 (1998). In 8th Annual V. M. Goldschmidt Conference,
Snow J.E., Schmidt G., Rampone E., Hofmann A.W. Highly Siderophile Elements (HSE) and Os Isotopes from the Ligurian Peridotites, N. Italy. Eos Trans. American Geophysical Union, Fall Meet. Suppl. (1998) 372.
Schmidt, G., Palme H. The concentrations of highly siderophile elements in Earth's upper crust as inferred from the compositions of large terrestrial impact melt sheets. In Lunar Planet. Sci. Conf. XXIX (CD-ROM, 1273, Lunar and Planetary Institute, Houston 1998). http://www.lpi.usra.edu/meetings/LPSC98/pdf/1273.pdf
Schmidt, G., Palme H., Kratz K.-L. Fractionation of Highly Siderophile Elements in the Earth's Upper Continental Crust. Inst. f. Kernchemie, Jahresbericht (1997), ISSN 0932-7622 (1998), 15.
Schmidt, G., Snow J. Highly Siderophile Elements (HSE) in Harzburgitic Melting Residues from the Garett Transform. Inst. f. Kernchemie, Jahresbericht (1997), ISSN 0932-7622 (1998), 16.
Snow J., Schmidt G., Rampone E., Hofmann A.W. Highly Siderophile Elements (HSE) and Os Isotopes from the Ligurian Peridotite Massifs, Genova
Schlösser D., Bissinger D., Heinrich E., Heidenreich S., Rollinger D., Schmidt G., Wolf B., Kratz K.-L. Neutronenaktivierungsanalyse - eine Methode zur Bestimmung von geogenen und anthropogenen Schwermetallbelastungen. Mainzer naturwissenschaftliches Archiv 35 (1997), 21-22. http://www.zfu.uni-mainz.de/Jahresberichte/Jahresbericht%201999.pdf
Schmidt G., Kratz K.-L., Palme H. Os, Re, Ir, Ru, Rh, Pd, Au in Borehole Samples from the Clearwater East Crater (
Snow J.E., Schmidt G. Proterozoic melting of the Zabargad peridotite: Os isotopic evidence. European Union of Geosciences EUG 9 (1997) Abstract Supplement No 1, Terra Nova Volume 9, 80.
Schmidt G., Snow J.E. Platinum group elements (PGE) in abyssal peridotites from the oceanic upper mantle. In Seventh Annual V. M. Goldschmidt Conference, LPI Contribution No. 921, Lunar and Planetary Institute,
Schmidt G., Palme H. Abundances of Os, Ir, Ru, Rh, Pt and Pd in the Earth's crust. In EAG-Workshop 1997, The origin and fractionation of highly siderophile elements in the Earth's mantle, MPI Mainz, (1997) 71.
Snow J.E., Schmidt G. HSE in the oceanic mantle. In EAG-Workshop 1997, The origin and fractionation of highly siderophile elements in the Earth's mantle, MPI Mainz, (1997) 73
Snow J.E., Schmidt G. A combined INAA-NTIMS method for simultaneous determination of platinum group elements (PGE), Au and Re abundances and Os isotopes. Inst. f. Kernchemie, Jahresbericht (1996), ISSN 0932-7622 (1997), 11.
Schmidt G., Palme H., Kratz K.-L. Os, Re, Ir, Ru, Rh, Pd, Au in Borehole Samples from the Clearwater East Crater (
Schmidt G., Snow J.E. Platinum Group Elements (PGE) in Serpentinized Abyssal Peridotites from the Oceanic Upper Mantle. Inst. f. Kernchemie, Jahresbericht (1996), ISSN 0932-7622 (1997), 33.
Snow J.E., Schmidt G. Proterozoic Melting of the Zabargad Peridotite: Os Isotopic Evidence. Inst. f. Kernchemie, Jahresbericht (1996), ISSN 0932-7622 (1997), 34.
Schmidt G., Palme H., Kratz K.-L. Platinum group elements, Re and Au in mantle rocks. In Proc. 14th European TRIGA Conference,
Schmidt G., Palme H., Kratz K.-L. The use of Platinum Group Element signatures for impactor identification of impact craters. In Proc. 14th European TRIGA Conference,
Bissinger D., Heinrich E., Hirsch R., Schloesser D., Schmidt G., Wolf B., Kratz K.-L. Neutron activation analyses at the Mainz TRIGA reactor. In Proc. 14th European TRIGA Conference,
Heinrich E., Schmidt G., Kratz K.-L. Determination of anthropogeneous Platinum-Group-Elements (PGEs) in soil samples by docimasy/NAA. In 4th International Conference on Nuclear and Radiochemistry, St
Heinrich E., Schmidt G., Kratz K.-L. Nachweis von Platinmetallen in Bodenproben. In 16. Seminar Aktivierungsanalyse, Hahn-Meitner-Institut Berlin, 2.-3. Mai. Konferenzband (1996) V6. http://kernenergi-wissen.de/Forschungsreaktoren/Ubersicht/Forschung_an_TRIGAS/forschung_ an_trigas.html
Schmidt G., Palme H., Kratz K.-L. Die Bestimmung von Os, Ir, Ru, Rh, Pd, Re und Au in Gesteinen der Erdkruste und des Erdmantels. In 16. Seminar Aktivierungsanalyse, Hahn-Meitner-Institut Berlin, 2.-3. Mai. Konferenzband (1996) P19.
Schmidt G., Palme H. The Late Veneer Hypothesis for the Origin of Highly Siderophile Elements in the Mantle of the Earth. In Six Annual V. M. Goldschmidt Conference, J. Conf. Abs. 1 (1996) 544, Heidelberg. https://goldschmidt.info/1996/544.html
Heinrich E., Schmidt G., Kratz K.-L. Verteilung der Platingruppenelementen in Böden. Inst. f. Kernchemie, Jahresbericht (1995), ISSN 0932-7622 (1996), 40.
Schmidt G., Palme H., Kratz K.-L. The Abundances of Os, Ir, Ru, Rh, Pd, Re and Au in the Mantle and the Earth`s Crust. Inst. f. Kernchemie, Jahresbericht (1995), ISSN 0932-7622 (1996), 18.
Schmidt G., Palme H., Kratz K.-L. The fractionation of Os, Re, Ir, Ru, Rh, Pd and Au in impact melts from European impact craters (Säksjärvi, Mien and Dellen) and the determination of the meteoritic components. In Lunar Planet. Sci. Conf. XXVI (1995) 1237-1238. http://www.lpi.usra.edu/meetings/programs/metsoc95wa
Heinrich E., Schmidt G., Kratz K.-L. Bestimmung von Platin, Palladium und Rhodium in Umweltproben mittels instrumenteller Neutronenaktivierungsanalyse. In Proc. Int. Symp. on Instrumentalized Analytical Chemistry and Computer Technology, InCom´95, Düsseldorf (1995)
Heinrich E., Schmidt G., Kratz K.-L. Determination of platinum, palladium and rhodium in the environment by instrumental neutron activation analysis. In Proc. 3rd Int. workshop on short time activation analysis, high rate g-spectroscopy and x-ray techniques, Wien (1995) http://www.zfu.uni-mainz.de/Jahresberichte/Jahresbericht%201995.pdf
Schmidt G., Palme H., Kratz K.-L. The fractionation of platinum-group-elements in impact melts from european impact craters. Annales Geophysicae, Supplement of Vol. 13, 1995; Geophysicae 13 (1995) C742.
Schmidt G., Palme H., Kratz K.-L. Abundances of highly siderophile elements (PGE, Re and Au) in upper mantle rocks. Berichte der Deutschen Mineral. Ges., Beih. z. Eur. J. Mineral. Vol. 7 (1995) 1, 211.
Schmidt G., Palme H., Kratz K.-L. Chemical exchange between the core and the convecting mantle of the Earth: evidence from highly siderophile elements (HSE). Meteoritics 30 (1995) 573. http://articles.adsabs.harvard.edu/full/1995Metic..30Q.573S
Schmidt G., Palme H., Kratz K.-L. The fractionation of highly siderophile elements (HSE) in impact melts and the determination of the meteoritic components. Meteoritics 30 (1995) 573-574. http://articles.adsabs.harvard.edu/full/seri/Metic/0030//0000574.000.html
Schmidt G., Palme H., Kratz K.-L. Extraterrestrial traces in impact melts from Skandinavian impact craters (Sääksjärvi, Mien and Dellen): The fractionation of Os, Re, Ir, Ru, Rh, Pd and Au and the determination of the meteoritic components. Inst. f. Kernchemie, Jahresbericht (1994), ISSN 0932-7622 (1995), 41.
Heinrich E., Schmidt G., Kratz K.-L. Nachweis von Platin, Palladium und Rhodium in Umweltproben. Inst. f. Kernchemie, Jahresbericht (1994), ISSN 0932-7622 (1995), 47.
Schmidt G., Palme H. & K.-L. Kratz (1995) PGE, Re und Au in massiven Peridotiten von Zabargad (Rotes Meer), Ronda (Spanien), Lanzo (Italien) und Mantel-Xenolithen von Shavaryn-Tsaram und Daringanga (Mongolei). Jahrestagung der Sektion Geochemie der Deutschen Mineralogischen Gesellschaft, Hamburg 07.-08.03.1995
Kratz K.- L. & Schmidt G. (1995) Geochemische Prozesse mit Langzeitfolgen im anthropogen beeinflußten Sickerwasser und Grundwasser. 1. Kolloquium des DFG-Schwerpunktprogramm, Bonn 09.02.1995
Schmidt G. (1995) Extraterrestrische Spuren in skandinavischen Impaktschmelzen. Seminar für Kern- und Kosmochemie, Mainz 25.01.1995
Schmidt G., Palme H., Kratz K.-L. Abundances of highly siderophile elements (PGE, Re and Au) in the upper mantle: New results on peridotites from Zabargad (Red Sea). In Workshop on the formation of the Earth's core, 18-20. April, Max-Planck-Institut für Chemie,
Schmidt G., Palme H., Kratz K.-L. Platinum Group Elements (PGE) in Upper Mantle Rocks from Zabargad
Schmidt G., Wasson J. T. Masses of the impactor, the Australasian tektites, and size estimates of the main source crater. Meteoritics 28 (1993) 430-431. http://articles.adsabs.harvard.edu/full/1993Metic..28Q.430S
Schmidt G., Pernicka E. Trace-element analysis of metal nodules, magnetic and nonmagnetic fractions, and chondrules of the Qingzhen EH3 chondrite. Meteoritics 28 (1993) 430. http://articles.adsabs.harvard.edu/full/1993Metic..28R.430S
Schmidt G., Zhou L., Wasson J. T. Iridium in sediments containing large abundances of Australasian microtektites from DSDP hole 758B in the Eastern Indian Ocean and from DSDP hole 769A in the Sulu Sea. In Lunar Planet. Sci. XXIV, Lunar Planet. Inst.,
Schmidt G., Pernicka E. The determination of platinum group elements (PGE) in target rocks and fall-back material of the Nördlinger Ries Impact crater (Germany). Meteoritics 26 (1991) 392. http://articles.adsabs.harvard.edu/full/1991LPICo.766..207S
Schmidt G., Pernicka E. The determination of platinum group elements (PGE) in target rocks and fall-back material of the Nördlinger Ries Impact crater (Germany). In Abstracts for the 54th Annual Meeting of the Meteoritical Society, Monterey (Kalifornien) (1991) 207. http://articles.adsabs.harvard.edu/full/1991LPICo.766..207S
Schmidt G., Pernicka E. Die Suche nach meteoritischen Signaturen in Gesteinen des Impaktkraters Nördlinger Ries, Jahresbericht, Max-Planck-Institut für Kernphysik, Heidelberg (1990) 177.
Schmidt G., Pernicka E. Pd, Os, Ir, Ru, Pt, Re und Au in Gesteinen des Impaktkraters Nördlinger Ries. Berichte der Deutschen Mineral. Ges., Beih. z. Eur. J. Mineral. Vol. 2, 1 (1990) 223
Schmidt G., Pernicka E. Die Bestimmung von refraktären siderophilen Elementen (Platinmetalle, Re und Au) in Gesteinen der Nördlinger Ries Forschungsbohrung 1973. Jahresbericht, Max-Planck-Institut für Kernphysik, Heidelberg (1989) 162.
Schmidt G., Chen Y., Pernicka E. Spurenelementuntersuchungen an verschiedenen Mineralphasen des Enstatit-Chondriten Qingzhen. Jahresbericht, Max-Planck-Institut für Kernphysik, Heidelberg (1988) 120-121.
Video documentation on volcanic ash from explosive eruptions of Icelandic volcanos affecting the atmosphere in southern Germany by the Heidelberger scientist Gerhard Schmidt
On April 14, 2010, when meltwaters from the Eyjafjallajökull glacier mixed with hot magma, an explosive eruption sent unusually fine-grained ash into the jet stream. The particles of explosive ash that reached Europe were especially sharp and abrasive over their entire size range, from submillimeter to tens of nanometers. In general, the assessment of the visual detectability of airborne volcanic ash is very complex because the detectability depends on many parameters, such as the brightness and the color contrast between the airborne volcanic ash and the background, illumination, particle size distribution and mass concentration, wavelength-dependent light scattering and absorption by the ash, and human perception (e.g. Weinzierl et al. 2012, Physics and Chemistry of the Earth, Vol. 45–46, Pages 87–102). However, on 19 April 2010 the ash cloud of the Icelandic volcano Eyjafjallajökull was clearly seen under clear-sky conditions by scattering of light near the horizon (early sunset) by Gerhard Schmidt from a mountain (Melibokus) about 30 km south of Frankfurt airport. The ash plume came from a north-westerly direction and covered the mountain road, named Bergstraße („strata montana“) south of the city of Darmstadt and north of Heidelberg. In the evening of 19 April 2010, a smell of sulfur is noticeable in the city of Bensheim about 40 km south of Frankfurt airport. Irritation of the mucous membranes was caused by the inhalation of the dust particles. Chemical fingerprints (characteristic major and trace element ratios, for example Sr/Zr, Sr/Rb, Zn/Cu, and elemental patterns) from sampled single ash particles from the Black Forest area have shown that at least 40% of the 2.5 and 10 µm size particles were of volcanic origin from the volcano eruption event (Schleicher et al. 2012, Atmospheric Environment 48, 113 - 121). The volcanic emissions of most concern are SO2, HF, sulphate (SO42-), CO2, HCl and H2S, although, there are other volcanic volatile species that may have human health implications, including mercury and other metals.
The Link to the video “Ground-based observations of the Eyjafjallajökull volcano ash plume over the northern upper Rhine Valley in Germany during air space closure in April 2010” can be found here:
https://filmfreeway.com/project/1306150 
