Wenn Sie Interesse an einem der folgenden Themen haben, kontaktieren Sie mich bitte!

• Die Bildung des Otjisazu Komplexes (Namibia): Wie beeinflusst Deformation die Primär-Mineralogie von Karbonatiten? (MSc.)
• Petrologie des Blue Hill Komplexes (Namibia): Die Genese eines ungewöhnlichen Pikrits (MSc.)
• Silifizierung des Twyfelskupje Karbonatits (Namibia): Bildung und Einfluss auf die Erzbildung (MSc.)
• Geologie und magmatische Entwicklung der Sierra de Monchique (Südliches Portugal): Beurteilung der magmatischen Prozessen während der Intrusion und Abkühlung von alkalinen Komplexen (MSc.)
• Das Potenzial zur Bildung von Karbonatit-assoziierten “Placer-Deposits”: Gibt es nördlich des Kaiserstuhl Vulkanit Komplexes (Deutschland) ein HFSE „Placer-Deposit“? (inkl. erforderlicher Geländearbeit; MSc.)
• Fenitisierungsprozesse am Amba Dongar Karbonatit Komplex (Indien): Systematiken einer Karbonatit-assoziierten Fluid-Nebengesteins Interaktion (BSc.)
• Der Guide Copper Mine Karbonatit (Südafrika): Eine mineralogische Studie und Erstbeschreibung (BSc.)
• Die Provenienz von Xenolithen des Kieshöhe Karbonatits (Diamanten Sperrgebiet, Namibia) (BSc.)
• Mineralogische und geochemische Charakterisierung der Karbonatite und Syenite der Radian und Dismal Ridges (Victoria Land, östliche Antarktis) (BSc.)
• Siliko-Karbonatite – Realität oder Mythos? Eine Fallstudie zu den Siliko-Karbonatiten der Fen (Norwegen) und Kaiserstuhl (Deutschland) Karbonatit Komplexe (MSc)

Projekte innerhalb der Mineralogischen Sammlungen:

• Identifikation von Sammlungsobjekten mit kolonialem Hintergrund und Aufarbeitung der Umstände zur Sammlungsintegration (MSc.)
• Konzeption einer Ausstellungsvitrine/virtuelle Sonderausstellung zur Thematisierung der Kupfer- und Germanium-Minerallagerstätte Tsumeb (Namibia) (BSc.)
• Konzeption einer Ausstellungsvitrine/virtuelle Sonderausstellung zu mineral-wissenschaftlichen Apparaturen vergangener Zeiten (BSc.)

Beruflicher Werdegang:

Seit 2020: “Affiliated researcher” des Fachgebiets für Geologie an der Universität des Freistaates (UFS, Bloemfontein, Südfrika)

Seit 2020: Wissenschaftlicher Mitarbeiter und Kustos der Mineralogischen Sammlungen (TU Berlin, Berlin, Deutschland)

2016 - 2020: Wissenschaftlicher Mitarbeiter (Eberhard Karls Universität, Tübingen, Deutschland)

2013 - 2015: Wissenschaftlicher Mitarbeiter (Staatliches Museum für Naturkunde in Karlsruhe, Karlsruhe, Deutschland)

Akademische Ausbildung

2019: Promotion in Petrologie und mineralische Rohstoffe. Eberhard Karls Universität, Tübingen, Deutschland

2013: MSc. in Lagerstättenkunde. Universität des Freistaates, Bloemfontein, Südafrika

2012: Dipl. Geol. in Geologie und Paläontologie. Martin-Luther Universität Halle-Wittenberg, Halle a.d. Saale, Deutschland

Mitgliedschaften

• Mitglied der Deutsche Mineralogische Gesellschaft (DMG)
• Mitglied der “Society of Geology applied to mineral deposits” (SGA)
• Mitglied der "Society of Mineral Museum Professionals" (SMMP)

Weitere Aktivitäten

• Gründungsmitglied der CALKROC Forschungsgruppe; ein inter-universitärer Forschungsverbund mit Fokus auf Karbonatite und alkaline Gesteins-Vorkommen (Carbonatite and ALKaline Rock OCcurrences)
• Mitglied der Chefredaktion des “Journal of Mineralogy and Geochemistry”
• Gutachter wissenschaftlicher Zeitschriften: American Mineralogist, Chemical Geology, Elements, Geochemistry, Journal of African Earth  Sciences, Journal of Asian Earth Sciences, Journal of Geochemical Exploration, Journal of Petrology, Lithos, Mineralium Deposita, Mineralogical Magazine
• Tagungsleitung Internationaler Konferenzen: Goldschmidt 2020 (“Diversity of Alkaline Rocks and Carbonatites: Stories of Origin, Mineral Deposit Formation, and More”), GeoKarlsruhe 2021 (“Carbonatites and alkaline rocks”)

Walter, B.F., Giebel, R.J., Siegfried, P.R., Gudelius, D. & Kolb, J. (2023): The eruption interface between carbonatitic dykes and diatremes – The Gross Brukkaros volcanic field Namibia. Chemical Geology. Vol. 621. 121344.

  https://doi.org/10.1016/j.chemgeo.2023.121344

Walter, B.F., Giebel, R.J., Marlow, A.G., Siegfried, P.R., Marks, M., Markl, G., Palmer, M. & Kolb, J. (2022): The Kieshöhe carbonatites of southwestern Namibia – the post-magmatic role of silicate xenoliths on REE mobilization. Communications of the Geological survey of Namibia vol. 25, 1-31

ISSN:1026-2954

Walter, B.F., Giebel, R.J., Steele-MacInnis, M., Marks, M.A. & Markl, G. (2021): Fluids associated with carbo-natitic magmatism: A critical review and implications for carbonatite magma ascent. Earth-Science Reviews. Vol. 215. 103509

https://doi.org/10.1016/j.earscirev.2021.103509

Walter, B.F., Steele-MacInnis, M., Giebel, R.J., Marks, M.A. & Markl, G. (2020): Complex carbonate-sulfate brines in fluid inclusions from carbonatites: Estimating compositions in the system H2O-Na-K-CO3-SO4-Cl. Geochimica et Cosmochimica Acta. Vol 277. P 224-242

https://doi.org/10.1016/j.gca.2020.03.030

Dietzel, C.A.F., Kristandt, T., Dahlgren, S., Giebel, R.J., Marks, M.A.W. & Markl, G. (2019): Hydrothermal processes in the Fen carbonatite complex, southern Norway. Ore Geology Reviews. Vol. 111.

https://doi.org/10.1016/j.oregeorev.2019.102969

Giebel, R.J., Parsapoor, A., Walter, B.F., Braunger, S., Marks, M.A.W., Wenzel, T. and Markl, G. (2019): Evidence for magma – wall rock interaction in carbonatites from the Kaiserstuhl Volcanic Complex (Southwest Germany). Journal of Petrology 60(6). P 1163-1194

https://doi.org/10.1093/petrology/egz028

Giebel, R.J., Marks, M.A.W., Gauert, C.D.K. and Markl, G. (2019): A model for the formation of carbonatite-phoscorite assemblages based on the compositional variation of mica and apatite from the Palabora Carbonatite Complex, South Africa. Lithos. Vol. 324-325. P 89-104

https://doi.org/10.1016/j.lithos.2018.10.030

Giebel, R.J., Gauert, C.D.K., Marks, M.A.W., Costin, G. and Markl, G. (2017): The Multistage REE Mineralization of the Palabora Carbonatite Complex, South Africa. American Mineralogist. Vol. 102(6). P 1218-1233

http://dx.doi.org/10.2138/am-2017-6004

Beukes, J.J., Gauert, C.D.K. and Giebel, R.J. (2016): Cryptic mineral variation and PGE distribution in the Merensky Reef and its discontinuous mela-gabbronoritic hanging wall (“Brown Sugar Norite” – BSN) at Two Rivers Platinum Mine, Eastern Bushveld Complex, South Africa. South African Journal of Geology. Vol. 119(1). P 243-272     

http://dx.doi.org/10.2113/gssajg.119.1.243

Geoscientific Colloquium of the University of Heidelberg, Heidelberg, Germany (11/01/2023) “Carbonatites - Evolution, mineralization and economic importance.“

Themenvortrag, VfMG Fachgruppe Berlin, Germany (12/09/2022) „Ein geologisch-mineralogischer Streifzug durch den Nordosten Südafrikas“

Annual meeting of the experts committee for "deposits/raw material"- of the Society of Metallurgists and Miners (GDMB): „Genese Karbonatit-gebundener Selten-Erd (SEE)-Mineralisationen/Lagerstätten“ (12/05/2021). Online.

International Colloquium of the Museum of Natural History Berlin. Talk series of “Huminities of Nature”: “Berlin Mineral Collections and their Interrelationships. A short history of the Mineralogical Collection of the TU Berlin” (08/12/2021). Online.

Colonial Collections in Berlin Universities, an interdisciplinary workshop (27/04/2021). Session 3: "Colonial Extraction and Berlin Mineralogical Collections" with Johannes Giebel, Christine Okoth and Yann LeGall. Online.

Talk series of the Geological Society of Namibia (online talk series on carbonatites and alkaline rocks held by RJ Giebel and BF Walter).Talk #2 (10/02/2021) “Fluid release and silicate-wall rock interaction in carbonatitic systems and its implications for carbonatite magma ascent and compositional evolution: A case study of the Kaiserstuhl complex, SW Germany, with relevance for Namibian complexes”

Talk series of the Geological Society of Namibia (online talk series on carbonatites and alkaline rocks held by RJ Giebel and BF Walter). Talk #1 (07/12/2020) “The geology and mineralogy of the Palabora Carbonatite Complex (South Africa) with special emphasis on its rare earth mineralization.”

Scientific Talk at the Indian Institute of Science Research and Education (IISER) in Bhopal, India (10/03/2020) “From mantle to crust: The magma ascent and evolution of carbonatites:”

12th Wettelröder Montanistisches Kolloquium, Wettelrode, Germany (21/09/2019) „Die Cu-P-Fe-SEE -Lagerstätte Palabora, Südafrika – Land und Leute.“

The geoscientific colloquium of the Martin-Luther-University Halle-Wittenberg, Halle/Saale, Germany (10/12/2018) “News on carbonatites: Platznahmemechanismen und mineralogische Variationen. Ein Vergleich zwischen dem Palabora und dem Kaiserstuhl Komplex.“ 

HitechAlkCarb project meeting of the Kaiserstuhl group as part of the Horizon 2020, Heitersheim, Germany (28/11/2018) “The impact of contamination in carbonatites of the Kaiserstuhl Volcanic Complex.”

3rd Expert Council on carbonatites and alkaline rocks in Edinburgh, Scotland (29-30/04/2017) “Advancing geomodels and sustainability for high-tech metal deposits” – topic (Giebel): How can volatile elements in roof zones of alkaline complexes (F, Cl, OH, S) be used to indicate if there is a prospective deposit below? – “Mineralization, Redistribution and Recrystallization of REE minerals in the Palabora Carbonatite Complex.”

14th Freiberg Short Courses in Economic Geology in Freiberg, Germany (07-10/12/2016) held by R. Marschik, T. Niiranen, R.J. Giebel “Iron Oxide Copper Gold and Iron Oxide Apatite Deposits” – topic (Giebel): carbonatites as part of the IOCG deposit family – The Palabora Carbonatite Complex. Another type of IOCG group deposits? Similarities and differences.

Giebel, R.J., Walter, B.F., Marks, M.A.W. & Markl, G. (2022). Silicates in carbonatites – origin and interpretation. Goldschmidt 2022. 

Magna, T., Barnes, J.D.,Rapprich, V. & Giebel, R.J. (2022): Constraints on the chlorine and fluorine inventory of carbonatites. Goldschmidt 2022. 

Tian, S., Magna, T., Rapprich, V., Moynier, F. & Giebel, R.J. (2022). Stable zirconium isotope constraints on the petrogenesisof carbonatites. Goldschmidt 2022. 

Kommescher, S., Magna, T., Rapprich, V., Fonseca, R.O.C., Kynický, J., Tappe, S. & Giebel, R.J. (2022): Mass-dependent titanium isotope variations of global carbonatites. Goldschmidt 2022. 

Raza, M., Giebel, R.J., Kolb, J. & Walter, B.F. (2022). The role of fluid chemistry in carbonatite-hosted HFSE -REE deposits. SEG Meeting 2022.

Walter, B.F., Giebel, R.J., Steele-MacInnis, M., Marks, M.A.W., Kolb, J. & Markl, G. (2021): A global review of carbonatite-hosted fluid inclusions and the role of fluid release on carbonatite magma ascent. GeoKarlsruhe 2021.

Giebel, R.J., Walter, B.F., Marks, M.A.W. & Markl, G. (2021): Wall rock contamination and mineralogical modifications in carbonatite dykes of the Palabora Complex, South Africa. GeoKarlsruhe 2021.

Ruwe, R., Giebel, R.J. & Walter, B.F. (2021): The fade of crustal contamination in the Gross Brukkaros carbonatites. GeoKarlsruhe 2021.

Walter, B.F., Giebel, R.J., Marlow, A., Marks, M.A.W., Markl, G. & Kolb, J. (2021): The Kieshöhe carbonatites in SW-Namibia – the role of silicatic xenoliths for REE exploration. GeoKarlsruhe 2021.

Walter, B.F., Giebel, R.J., Steele-MacInnis, M., Marks, M.A.W., Kolb, J. and Markl, G. (2021). Fluid release in carbonatitic systems, and its implication for carbonatite magma ascent, compositional evolution and REE-mineralization. Goldschmidt Lyon (2021).

Walter, B.F., Giebel, R.J., Marks, M.A.W. & Markl, G. (2020): Magmatic Interaction in Peralkaline Syenites of the Junguni Complex, Malawi. Goldschmidt Conference, Honolulu, Hawaii (USA), 21-26 June 2020. Pp1

Giebel, R.J., Walter, B.F., Marks, M.A.W. & Markl, G. (2020): Mica Compositions Record Carbonatite – Silicate Wall-Rock Interaction. Goldschmidt Conference, Honolulu, Hawaii (USA), 21-26 June 2020. Pp1

Gawęda, A., Szopa, K., Giebel, R. J., Chew, D., Sałacińska, A. & Gumsley, A. (2019): Petrological and geochronological study of apatites from Phalaborwa Complex (Limpopo Province, South Africa). International Conference on Accessory Minerals. Zavaritsky Institute of Geology and Geochemistry, Ekaterinburg, Russia. 3-5 September. Pp2

Walter, B.F., Steele-MacInnis, M., Giebel, R.J., Marks, M.A.W. & Markl, G. (2019): A critical review on carbonatite hosted fluids with a special focus on the Kaiserstuhl SW-Germany. Goldschmidt Conference, Barcelona, Spain, 18-23 August 2019. Pp1

Marks, M.A.W., Giebel, R.J., Walter, B.F., Braunger, S., Wenzel, T. & Markl, G. (2019): Evidence for wall-rock assimilation in carbonatites from the Kaiserstuhl (Germany). Goldschmidt Conference, Barcelona, Spain, 18-23 August 2019. Pp1

Giebel, R.J., Marks, M.A.W., Gauert, C.D.K. & Markl, G. (2019): A model for the formation of carbonatite-phoscorite assemblages. Goldschmidt Conference, Barcelona, Spain, 18-23 August 2019. Pp1

Giebel, R.J., Gauert, C.D.K., Marks, M.A.W. & Markl, G. (2019): The ascent of carbonatitic magmas. 21st Quenstedt Symposium. Tübingen, Germany, 12 Juli 2019. D3 (Best presentation of a PhD thesis 2019)

Du Plessis, P.G., Roelofse, F., Gauert, C.D.K., Giebel, R.J. & Rentel, R. (2019): Sulphide mineral paragenesis of Palabora Complex carbonatites, South Africa. Igneous and Metamorphic Study Group Conference. Parys, RSA, 13-16 January. Pp1

Giebel, R.J., Marks, M.A.W., Gauert, C.D.K. & Markl, G. (2017): Fluid-Mineral interaction and REE mineralization in the Palabora Carbonatite Complex. Goldschmidt Conference, Paris, France, 13-18 August 2017. Pp1

Giebel, R.J., Marks, M.A.W., Gauert, C.D.K. and Markl, G. (2017): The Evolution of REE minerals of the Palabora Carbonatite Complex, South Africa. DMG section meeting Petrology. Berlin, Germany, 23-24 June 2015. Pp 1

Giebel, R.J., Marks, M.A.W., Markl, G. & Gauert, C.D.K. (2016): Variability of REE mineralization in the Loolekop carbonatite of the Palabora Complex. 1st GOOD Meeting. Freiberg, Germany, 15-17 March 2016. P 31 (Best Poster Price)

Giebel, R.J., Gauert, C.D.K., Marks, M.A.W. & Markl, G. (2016): Magmatic-hydrothermal processes forming the REE mineralisation in the Loolekop carbonatite of the Palabora Complex, South Africa. 35th International Geological Congress. Cape Town, South Africa, 27 August – 4 September 2016. P 2014 (Poster)

Giebel, R.J. & Gauert, C.D.K. (2016): Hydrothermal U-Zr enrichment in hydraulic breccias of the carbonatite pipe of the Palabora Complex, Limpopo province. Igneous and Metamorphic Study Group Conference. University of Pretoria, RSA, January 2016. Pp 1

Giebel, R.J., Gauert, C.D.K., Marks, M.A.W. & Kotzé, E. (2015): The Palabora Carbonatite Complex: A review of its geotectonic setting and outlook on incompatible element deportment. DMG section meeting Petrology. Potsdam, Germany, June 2015. Pp 1 (Poster)

Giebel, R.J. & Gauert, C.D.K. (2015): Characterization of the REE mineralization in the lower pipe section of the Palabora carbonatite complex, Limpopo Province. Igneous and Metamorphic Study Group Conference. University of Pretoria, RSA, January 2015. Pp 1

Gaweda, A., Gauert, C., Szopa, K., Chew, D. & Giebel, R.J. (2015): Palaeoproterozoic post-magmatic cooling of the Phalaborwa Complex, South Africa, constrained by U-Pb apatite dating. 22nd Meeting of the Petrology group of the Mineralogical Society of Poland. Sadomierz, Poland, 8-11 October 2015. Mineralogia – Special Papers. Vol. 44. P 37

Giebel, R.J., Gauert, C.D.K. & Costin, G. (2015): Rare earth minerals in the lower part of the Palabora Carbonatite Complex, South Africa. 13th SGA Biennial Meeting: Mineral resources in a sustainable world. Nancy, France, 24-27 August 2015. P 1009-1012

Giebel, R.J., Gauert, C.D.K. & Schannor, M. (2013): Textural and geochemical aspects of Upper Critical Zone rocks of the eastern Bushveld Complex at Two Rivers Platinum mine, South Africa. DMG, GV and SEDIMENT Joint Annual Meeting – Geofluids: Lubricants of Dynamic Earth. Tübingen, Germany, 16-19 September 2013. Abstract volume. P 99 (Poster)

Gauert C.D.K., Kotzé, E., Beukes, J.J. & Giebel, R.J. (2013): Contribution Reef disturbances of Critical Zone rocks of the eastern Bushveld Complex in the vicinity of the Steelpoort fault, South Africa – petrogenetic implications. 12th SGA Biennial Meeting: Mineral deposit research for a high tech world. Uppsala, Sweden, 12-15 August 2013. P 989-992

Gauert, C.D.K., Giebel, R.J., Schannor, M. & Beukes, J.J. (2012): Mineralogical and geochemical investigations of Critical Zone rocks south and north of the Steelpoort fault of the eastern Bushveld Complex – petrogenetic implications. 9th International Inkaba Workshop. Potsdam, Germany, 25 November - 1 December 2012. P 27