Dr Nils Lenhardt

         

Senior Lecturer

Physical Volcanology

Office: 4-38 Mineral Sciences Building

E-mail: [email protected]

Phone: +27 (0)12 420 3310


RESEARCH INTERESTS

Present focus:

·       Volcanism along the East African Rift System

·       Volcanic hazard assessment

·       Influence of magmatic activity on basin maturation and hydrocarbon formation

Current research projects:

·       Pre-Drakensberg volcanism and sill intrusions of the Karoo and their significance for basin evolution (2015)

·       Physical volcanology and hazard assessment of the Holocene Ngozi Caldera, Tanzania (2013-present)

·       Seismic Hazards Assessment of Cameroon (2013-present)

·       Morphometry of cinder cones and maar volcanoes of the Bayuda monogenetic volcanic field, Sudan (2012-present)

·       Physical volcanology of the 2.06 Ga Rooiberg Group near Modimolle (Limpopo), South Africa (2012-present)

Completed research projects:

·       Palynofacies of the Lower No 4 Coal Seam (Highveld Coalfield, South Africa) (2012-2014)

·       Chemical evolution of the Paleoproterozoic Rooiberg Group, Kaapvaal Craton, South Africa: new insights into the formation of a silicic large igneous province (SLIP) (2011-2014)

·       Physical volcanology of the 2.06 Ga Rooiberg Group near Loskop Dam (Mpumalanga), South Africa (2011-2014)

·       Volcanism of the 2.35-2.1 Ga Pretoria Group and the 2058 Ma Bushveld Complex and their relationship to the inherent tectonic setting (2010-2011)

·       Reservoir characteristics of Middle Triassic carbonate ramp deposits with respect to hydrocarbon exploration as well as the use of geothermal energy (2009)

·       Reservoir characteristics of Neogene volcaniclastics in Central Mexico with respect to hydrocarbon exploration as well as the use of geothermal energy (2009)

·       Deutsche Forschungsgemeinschaft (DFG) funded project 643/5-1: Sedimentology, stratigraphy and palynology of the volcaniclastic Tepoztlan Formation (Lower Miocene, Central Mexico): Implications for the evolution of the Transmexican Volcanic Belt (2006-2009)

Ongoing research and interests:

·       Active volcanism

·       Explosive volcanism

·       Volcanogenic sediments

·       Magma-water interactions

·       The impact of volcanic eruptions on the environment

·       Large Igneous Provinces


EDUCATION

·       2009 Ph.D. (Dr. rer. nat.) Earth Sciences, Technical University of Darmstadt, Germany

·       2004 Dipl.-Geol. (equiv. to M.Sc.) Geology and Palaeontology, Technical University of Darmstadt, Germany


EMPLOYMENT

·       2014-present: Senior Lecturer, University of Pretoria, South Africa

·       2011-2013: Lecturer, University of Pretoria, South Africa

·       2010-2011: Postdoctoral Research Fellow, University of Pretoria, South Africa

·       2005-2009: Research Assistant, Technical University of Darmstadt, Germany

·       1998-2004: Research Assistant, Hessian State Museum, Darmstadt, Germany


TEACHING & PROJECT SUPERVISION

Responsibilities:

·       Class guardian for 3rd year level Geology students

·       3rd year ore collection

·       Honours mapping camp (together with Prof. A. Bumby)

Project supervision:

In progress Ph.D.:

·       2015: Supervision of Ph.D. project for Mr Samson Motlagomang Masango (Physical Volcanology)

·       2013-present: Supervision of Ph.D. project for Mr Gert-Jan Peeters (Physical Volcanology)

·       2012-present: Supervision of Ph.D. project for Mr Mohamed Abaker Abdalla (Sedimentology)

Completed and Submitted Ph.D.:

·       2011-2014: Supervision of Ph.D. project for Mr Olutola Jolayemi (Geochemistry)

In progress M.Sc.:

·       2013-present: Co-supervision of M.Sc. project for Ms Ariane Wetie (Seismic Hazards)

·       2012-present: Supervision of M.Sc. project for Mr Fahad Mahmood (Physical Volcanology)

Completed and Submitted M.Sc.:

·       2012-2014: Supervision of M.Sc. project for Ms Susan Serfontein (Palynology)

·       2011-2014: Supervision of M.Sc. project for Mr Samson Motlagomang Masango (Physical Volcanology)

Lecturing:

University of Pretoria:

·       2014-present: GLY706 Ore deposits and mining methods (Honours level)

·       2011-present: GLY361 Ore Deposits (3rd year level)

·       2011-present: GLY702 Physical Volcanology (Honours level)

·       2012-2013: GLY352 Geodynamics and Ore-forming processes (3rd year level)

·       2011: GLY162 Environmental Geology (1st year level)


PUBLICATIONS

Scientific Publications:

·       Lenhardt, N., Peeters, G.-J. & Macheyeki, A.S. (in press) The Ituwa Surge Deposits of the Holocene Ngozi Caldera, Mbeya Region, Tanzania. International Journal of Earth Sciences. DOI:10.1007/s00531-014-1113-7.

·       Lenhardt, N. & Oppenheimer, C. (2014) Volcanism in Africa: Geological perspectives, hazard assessment and societal implications. In: Ismail-Zadeh, A., Urrutia-Fucugauchi, J., Kijko, A., Takeuchi, K., Zaliapin, I. (Eds.) Extreme Natural Hazards, Disaster Risks and Societal Implications, IUGG Special Publication Series, Cambridge University Press, 169-199.

·       Eriksson, P.G., Banerjee, S., Catuneanu, O., Corcoran, P.L., Eriksson, K.A., Hiatt, E.E., Laflamme, M., Lenhardt, N., Long, D.G.F., Miall, A.D., Mints, M.V., Pufahl, P.K., Sarkar, S., Simpson, E.L. & Williams, G.E. (2013) Secular changes in sedimentation systems and sequence stratigraphy. Gondwana Research, 24, 468-489. doi: 10.1016/j.gr.2012.09.008.

·       Lenhardt, N., Böhnel, H., Hinderer, M. & Hornung, J. (2013) Paleocurrent direction measurements in a volcanic setting by means of anisotropy of magnetic susceptibility: A case study from the Lower Miocene Tepoztlán Formation (Transmexican Volcanic Belt, Central Mexico). Sedimentary Geology, 290, 1-14. doi: 10.1016/j.sedgeo.2013.02.013.

·       Lenhardt, N., Herrmann, M. & Götz, A.E. (2013) Palynomorph preservation in volcaniclastic rocks of the Miocene Tepoztlán Formation (Central Mexico) and implications for paleoenvironmental reconstruction. Palaios, 28(10), 710-723. doi: 10.2110/palo.2013.p13-015r.

·       Altermann, W. & Lenhardt, N. (2012) The volcano-sedimentary succession of the Archean Sodium Group, Ventersdorp Supergroup, South Africa: Volcanology, facies and geochemistry. Precambrian Research, 214-215, 60-81. doi: 10.1016/j.precamres.2012.02.012.

·       Eriksson, P.G., Bartman, R., Catuneanu, O., Mazumder, R. & Lenhardt, N. (2012) Relationship between microbial mat-related features, inferred palaeoenvironments and sequence stratigraphic models: a case study on sandstones within clastic epeiric basin-fills from the Palaeoproterozoic Pretoria Group (Transvaal Supergroup), Kaapvaal craton, South Africa. Sedimentary Geology, 263-264, 67-75. doi: 10.1016/j.sedgeo.2011.08.006.

·       Lenhardt, N. & Eriksson, P.G. (2012) Volcanism of the Palaeoproterozoic Bushveld Large Igneous Province: the Rooiberg Group, Kaapvaal Craton, South Africa. Precambrian Research. 214-215, 82-94. doi: 10.1016/j.precamres.2011.12.003.

·       Lenhardt, N., Eriksson, P.G., Catuneanu, O. & Bumby, A.J. (2012) Nature of and controls on volcanism in the c. 2.35 – 2.05 Ga Pretoria Group, Kaapvaal Craton, South Africa. Precambrian Research. 214-215, 106-123. doi: 10.1016/j.precamres.2011.09.012.

·       Mazumder, R., Eriksson, P.G., De, S., Bumby, A.J. & Lenhardt, N. (2012) Palaeoproterozoic sedimentation on the Singhbhum craton: global context and comparison with Kaapvaal. In: Mazumder, R. & Saha, D. (Eds.), Palaeoproterozoic of India. Geological Society, London, Special Publications, 365, pp. 51-76.

·       Eriksson, P.G., Lenhardt, N., Wright, D.T., Mazumder, R. & Bumby, A.J. (2011) Late Neoarchaean-Palaeoproterozoic supracrustal basin-fills of the Kaapvaal craton: relevance of the supercontinent cycle, the "Great Oxidation Event" and "Snowball Earth"? Marine and Petroleum Geology, 28, 1385-1401. doi: 10.1016/j.marpetgeo.2011.05.007.

·       Götz, A.E. & Lenhardt, N. (2011) The Anisian carbonate ramp system of Central Europe (Peri-Tethys Basin): sequences and reservoir characteristics. Acta Geologica Polonica, 61, 59-70.

·       Lenhardt, N. & Götz, A.E. (2011) Volcanic settings and their reservoir potential: an outcrop analogue study on the Miocene Tepoztlán Formation, Central Mexico. Journal of Volcanology and Geothermal Research, 204, 66-75. doi: 10.1016/j.jvolgeores.2011.03.007.

·       Lenhardt, N., Hornung, J., Hinderer, M., Böhnel, H., Torres-Alvarado, I.S. & Trauth, N. (2011) Build-up and depositional dynamics of an arc front volcaniclastic complex: The Miocene Tepoztlán Formation (Transmexican Volcanic Belt, Central Mexico). Sedimentology, 58, 785-823. doi: 10.1111/j.1365-3091.2010.01203.x.

·       Lenhardt, N., Böhnel, H., Wemmer, K., Torres-Alvarado, I.S., Hornung, J. & Hinderer, M. (2010) Petrology, magnetostratigraphy and geochronology of the Miocene volcaniclastic Tepoztlán Formation: implications for the initiation of the Transmexican Volcanic Belt (Central Mexico). Bulletin of Volcanology, 72, 817-832. doi: 10.1007/s0045-010-0361-z.

·       Lenhardt, N., Martinez-Hernandez, E., Götz, A.E., Hinderer, M., Hornung, J., Torres--Alvarado, I.S. & Kempe, S. (2006): Palaeoenvironmental Reconstruction of the Miocene Tepoztlán Formation (Central Mexico): Preliminary Results of Palynological Investigations. In: Espinasa-Perena, R. & Pint, J. (Eds.), Proceedings of the X, XI, and XII international symposia on volcanospeleology. AMCS Bulletin, 19: 158-161.

Popular Publications:

·       Radio Pretoria (interview about the Tangkubanparahu (Western Java, Indonesia) eruption on March 6th 2013); Live-Interview on 7th March 2013.

·       RSG Radio (interview about the Tongariro (New Zealand) eruption on August, 6th 2012); broadcasted on August, 11th 2012.

·       SABC 2 50/50 (interview on positive effects of volcanic activity and the volcanism of the Pilanesberg Alkaline Complex); shown in October 2010


CONFERENCES

·       Abaker Abdalla, M. & Lenhardt, N. (2014) The N-S Trending Boundary Fault of the Fula Sub-Basin, Sudan. Geometry and Growth of Normal Faults meeting, Geological Society, London, June 23-25, 2014. programme and abstract volume, p. 211.

·       Lenhardt, N. & Abaker Abdalla, M. (2014) Lacustrine Deltas in the Fula Sub-Basin – Morphology, Type and Significance in the Oil Exploration of Sudan. International Conference & Exhibition, Istanbul, Turkey, September 14-17, 2014. AAPG Datapages/Search and Discovery Article #90194.

·       Peeters, G.-J., Lenhardt, N., Fontijn, K. & Macheyeki, A. (2014) Reconstruction of the Holocene eruptive history of the Ngozi Caldera (Tanzania) and its implication for a hazard assessment of the nearby city Mbeya: preliminary results. (IAVCEI) Cities on Volcanoes 8, Yogyakarta, Indonesia, 9.-13.09.2014.

·       Altermann, W., Frei, D. & Lenhardt, N. (2013) New correlation and age data for the Neoarchean Ventersdorp Supergroup, South Africa. 24th Colloquium of African Geology, Addis Ababa, Ethiopia, 09.-13.01.13. 

·       Fontijn, K., Peeters, G.-J., Lenhardt, N., Macheyeki, A. & Williamson, D. (2013) The Rungwe Volcanic Province, Tanzania: Physical Volcanology of the Holocene explosive eruptions – and implications for hazard assessment. Active Volcanism and Continental Rifting (AVCOR) workshop with special focus on the Kivu rift zone, Gisenyi, Rwanda, 12.-14.11.2013. Book of abstracts, 38.

·       Jolayemi, O.O., Lenhardt, N., Roberts, J. & Masango, S.M. (2013) Chemical evolution of the Paleoproterozoic Rooiberg Group, Kaapvaal Craton, South Africa: new insights into the formation of silicic large igneous provinces (SLIPs). 24th Colloquium of African Geology, Addis Ababa, Ethiopia, 09.-13.01.13.

·       Jolayemi, O.O., Roberts, J. & Lenhardt, N. (2013): The Paleoproterozoic Rooiberg Group, Kaapvaal Craton, South Africa: New Insights into the Formation of Silicic Large Igneous Provinces (SLIPs). Goldschmidt2013, Florence, Italy, 25.08.-30.08.2013. Mineralogical Magazine, 77(5), 1402.

·       Masango, S.M., Lenhardt, N. & Jolayemi, O.O. (2013) First lithofacies analysis on and the geodynamic setting of a Palaeoproterozoic silicic large igneous province:  the Rooiberg Group, Kaapvaal Craton, South Africa. 24th Colloquium of African Geology, Addis Ababa, Ethiopia, 09.-13.01.13.

·       Ngongang Wetie, A., Kijko, A. & Lenhardt, N. (2013) Seismic Hazards Assessment of Cameroon. Active Volcanism and Continental Rifting (AVCOR) workshop with special focus on the Kivu rift zone, Gisenyi, Rwanda, 12.-14.11.2013. Book of abstracts, 94.

·       Altermann, W., Lenhardt, N. & Barton, E. (2012): New Age Data for the Ventersdorp Supergroup, Kaapvaal Craton and correlation to the Fortescue Group, Pilbara Craton. 34th International Geological Congress (IGC), 5.-10.08., Brisbane, Australia.

·       Lenhardt, N. & Eriksson, P.G. (2011): Lithofacies of the volcanic Machadodorp Member (Silverton Formation), South Africa.- 23rd Colloquium of African Geology, Johannesburg, South Africa, 08.-14.01.11., Abstracts volume, p. 239.

·       Navaya, S., Lenhardt, N. & Eriksson, P.G. (2011): Geochemistry of the volcanic Machadodorp Member, Silverton Formation, South Africa.- 23rd Colloquium of African Geology, Johannesburg, South Africa, 08.-14.01.11., Abstracts volume, p. 299.

·       Nkosi, N., Lenhardt, N. & Eriksson, P.G. (2011): Thermal evolution of the Rooiberg Group, South Africa.- 23rd Colloquium of African Geology, Johannesburg, South Africa, 08.-14.01.11., Abstracts volume, p. 309.

·       Götz, A.E. & Lenhardt, N. (2009): Sequences and reservoir characteristics of a Middle Triassic carbonate system (Peri-Tethys Basin, Central Europe).- 27th IAS Meeting of Sedimentology, Alghero, Italy, 20.-23.09.09.

·       Lenhardt, N., Hinderer, M., Hornung, J., Torres-Alvarado, I.S. & Böhnel, H. (2009): The Miocene Tepoztlán formation (Central Mexico) – Key to a better understanding of the initial phase of the Transmexican Volcanic Belt. In: Haczewski, G. (ed.): Abstracts and Field Guide, 6th annual conference of SEPM-CES SEDIMENT 2009, Cracow, Poland, 24.-25.06.09, p. 28.

·       Torres-Alvarado, I.S., Lenhardt, N., Hinderer, M. & Hornung, J. (2009): Composición química e isotópica de las rocas volcánicas de la Formación Tepoztlán, Estados de México y Morelos. XIX Congreso Nacional de Geoquímica, Actas INAGEQ, vol. 15, pp. 39.

·       Götz, A.E. & Lenhardt, N. (2008): Reservoir characteristics of Middle Triassic ramp deposits: the Lower Muschelkalk Jena Formation (Steudnitz, Germany).- 26th IAS Regional Meeting/ SEPM-CES Sediment 2008, Bochum, 1.-3.09., SDGG 58, Abstract volume, p. 120

·       Lenhardt, N. & Götz, A.E. (2008): Reservoir characteristics of ash-flow deposits: a case study on the Tepoztlán Formation, Central Mexico.- IAVCEI General Assembly 2008, Reykjavik, 17.-22.08., Abstracts: Poster Session IV, 2l-P04, p. 30.

·       Lenhardt, N., Herrmann, M., Mosbrugger, V. & Hinderer, M. (2008): Palynology of the Tepoztlán Formation, Central Mexico – palaeoenvironmental and palaeoclimatological implications.- Terra Nostra 2008/2, 12th International Palynological Congress IPC-XII/IOPC-VIII, Bonn, Abstract Volume, p. 162. 

·       Lenhardt, N., Hinderer, M., Hornung, J., Torres-Alvarado, I.S. & Böhnel, H. (2008): Facies model of the Miocene volcaniclastic Tepoztlán Formation: a step forward in deciphering the initial phase of the Transmexican Volcanic Belt.- IAVCEI General Assembly 2008, Reykjavik 17.-22.08., Abstracts: Oral presentations: Monday, p. 84.

·       Lenhardt, N., Hinderer, M., Hornung, J., Torres-Alvarado, I.S. & Böhnel, H. (2008): A facies model of a volcaniclastic apron: The Miocene Tepoztlán Formation (Central Mexico).- 26th IAS Regional Meeting/ SEPM-CES Sediment 2008, Bochum, 1.-3.09., SDGG 58, Abstract volume, p. 167

·       Lenhardt, N., Hinderer, M., Hornung, J., Torres-Alvarado, I.S. & Böhnel, H. (2007): The Miocene Tepoztlán Formation (Central Mexico) - Key to a better understanding of the initial phase of the Transmexican Volcanic Belt.- Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract V41D-0805.

·       Lenhardt, N., Trauth, N., Hornung, J., Hinderer, M., Torres-Alvarado, I.S. & Böhnel, H. (2007): Depositional processes of Miocene volcaniclastic series at the southern edge of the Transmexican Volcanic Belt.- 20th Colloquium on Latin American Earth Sciences, Kiel 11.-13.07, Abstracts, SZ2P05, p. 290.

·       Lenhardt, N., Martinez-Hernandez, E., Götz, A.E., Hinderer, M. & Hornung, J. (2006): Palynomorph assemblages from a Miocene volcaniclastic section in Central Mexico (Tepoztlán Formation): evidence for palaeoenvironmental changes.- 7th European Paleobotany-Palynology Conference, Prague 6.-11.09.06, Program and abstracts,  p. 80, ISBN 80-7036-198-0.

·       Lenhardt, N., Martinez-Hernandez, E., Götz, A.E., Hinderer, M., Hornung, J. & Kempe, S. (2006): Palaeoenvironmental reconstruction of the Miocene Tepoztlán Formation using palynology.- XII International Symposium on Volcanospeleology, Tepoztlán, 02.-07.07.06, Programm and Abstracts: 6.

·       Lenhardt, N., Götz, A.E., Hinderer, M. & Hornung, J. (2006) A new reference section from volcaniclastic rocks of Miocene terrestrial palynomorphs in Central Mexico. EGU Geophysical Research Abstracts, Vol. 8: 03121, 2006.

·       Lenhardt, N., Hinderer, M. & Hornung, J. (2005): First extraction of pollen grains and spores from volcaniclastic deposits: implication for environmental conditions at the initiation of the Transmexican Volcanic Belt in the Miocene.- 19th Colloquium on Latin American Earth Sciences, Potsdam 18.-20.05, Terra Nostra (05/1).

·       Lenhardt, N. (2004): Erste Ergebnisse einer palynologischen Datierung und Paläoenvironment-Rekonstruktion innerhalb tertiärer Vulkanoklastika in Zentral-Mexiko.- 74. Jahrestagung der Paläontologischen Gesellschaft, Geobiologie 2004, Göttingen 2.-8.10.04. Kurzfassungen der Vorträge und Poster.- Göttingen: Univ.-Verl.- ISBN 3-930457-60-1.

·       Hinderer, M., Lenhardt, N. & Torres-Alvarado, I.S. (2003): Vulkanoklastika als Dokumente der Evolution des Transmexikanischen Vulkangürtels im Tertiär - erste Ergebnisse.- Sediment 2003, Wilhelmshaven, Germany 10.-14.06.03. Program, abstracts & field trips/ 18th Meeting of Sedimentologists.


AFFILIATIONS AND MEMBERSHIPS

·       CCC: (IAVCEI) Commission on Collapse Calderas

·       DGG: Deutsche Geologische Gesellschaft (German Association of Geosciences)

·       GSA: Geological Society of America

·       GSAf: Geological Society of Africa

·       GV: Geologische Vereinigung (German Geological Society)

·       IAVCEI: International Association of Volcanology and Chemistry of the Earth’s Interior


USEFUL LINKS

·       International Association of Volcanology and Chemistry of the Earth’s Interior: http://www.iavcei.org

·       Global Volcanism Program (Smithsonian National Museum of Natural History): http://www.volcano.si.edu/world/region.cfm?rnum=02&rpage=sources

·       The International Volcanic Health Hazard Network: http://www.ivhhn.org/

·       ScienceDaily (your source for the latest news on volcanoes): http://www.sciencedaily.com/news/earth_climate/volcanoes/Reserved:

 

Last edited by Zama Mthembu

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