Dr Nils Lenhardt

Senior Lecturer

Sedimentology and Physical Volcanology

Office: 4-38 Mineral Sciences Building

E-mail: [email protected] 

Phone: +27 (0)12 420 3310


RESEARCH INTERESTS

Ongoing research and interests:

  • Volcanogenic sediments and magma-sediment interactions
  • The impact of volcanic eruptions on the environment and sedimentary systems
  • Active volcanism
  • Explosive volcanism
  • Large igneous provinces
  • Hydrocarbon formation in volcano-sedimentary basins

EDUCATION

  • 2005-2009 Ph.D. (Dr. rer. nat.) Earth Sciences, Technical University of Darmstadt, Germany 
  • 1997-2004 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

Teaching:

  • 2019-present: GLY163 Earth History (1st year level)
  • 2015-present: GLY253 Sedimentology (2nd year level)
  • 2011-present: GLY702 Physical Volcanology (Honours level)
  • 2017-2019: GLY266 Second year mapping camp (2nd year level)
  • 2016-2019: GLY703 Basin Analysis (Honours level)
  • 2012-2019: GLY707 Honours mapping camp (Honours level)
  • 2014-2015: GLY706 Ore deposits and mining methods (Honours level)
  • 2012-2013: GLY352 Geodynamics and Ore-forming processes (3rd year level)
  • 2011-2017: GLY361 Ore Deposits (3rd year level)
  • 2011: GLY162 Environmental Geology (1st year level)

Postgraduate project supervision:

MSc Projects (ongoing)

2016-present:   Mr. Todani Khorombi – Thermal alteration of sedimentary rocks within the contact aureoles of dolerite intrusions intersected by borehole KWV-1 (Willowvale, Eastern Cape Province, South Africa) (co-supervision with Dr. Christophe Galerne; GEOMAR, Kiel, Germany)

2016-present:   Ms. Bhavisha Narotam – Physical volcanology, sedimentology and geochronology of the Schrikkloof Formation (Rooiberg Group) along the boundary with the Waterberg Group (co-supervision with Prof. Adam Bumby)

2016-present:   Mr. Fred Ngeleka – Petrography, geochemistry and geochronology of the doleritic intrusions of bore hole KWV-1 (Willowvale, Eastern Cape Province) (co-supervision with Prof. Petrus Le Roux (UCT) and Dr. Christophe Galerne (GEOMAR, Kiel, Germany))

2017-present:   Ms. Kieran Byrch – Magma-water interaction and diatreme formation in the upper Clarens Formation (Barkly East, Eastern Cape Province) before the onset of the Drakensberg volcanism (co-supervision with Prof. Lothar Viereck; Friedrich-Schiller University, Jena, Germany)

2017-present:  Mr. Luzuko Chiya – Petrography and geochemistry of hydrothermal breccias in the Schrikkloof Formation (Rooiberg Group), north of Modimolle, South Africa (co-supervision with Prof. Laurence Robb; University of Oxford, UK)

MSc Projects (completed)

2018-2020:      Mr. Francois Lötter – Petrography and geochemistry of the Holocene monogenetic Bayuda Volcanic Field, Sudan: Insights into the magma plumbing system (co-supervision with with Prof. Lothar Viereck (Friedrich-Schiller University, Jena, Germany) and Dr. Mohammed Altigani (Al Neelain University, Khartoum, Sudan))

2013-2017:      Ms. Ariane Wetie Ngongang – Seismic hazard assessment of Cameroon with special focus on Mount Cameroon (co-supervision with Prof. Andrzej Kijko)

2012-2015:      Ms. Susan Serfontein – Palynofacies of the Lower No 4 Coal Seam (Highveld Coalfield, South Africa) (co-supervision with Prof. Annette E. Goetz)

2011-2015:      Mr. Samson Motlagomang Masango – Physical volcanology of the Rooiberg Group near Loskop Dam (Mpumalanga), South Africa 

PhD Projects (ongoing)

2015-present:   Mr. Samson Motlagomang Masango – Physical Volcanology and Geochemistry of the Hekpoort/Ongeluk Formation of the Transvaal Supergroup, Kaapvaal Craton, South Africa (co-supervision with Prof. Wladyslaw Altermann)

2019-present:   Mr. Erepamo Omietimi – Sedimentological, Geochemical and Petrophysical Evaluation of Maastrichtian Sediments of the Benin Flank, Anambra Basin Nigeria. (co-supervision with Prof. Adam Bumby and Prof. Renchao Yang, Shandong University of Science and Technology, China)

2020-present:  Mr. Nimchak R. Nanmwa – Thermal effects of magmatic intrusions on Lead-Zinc (Pb-Zn) mineralization and reservoir/source rock maturation in the Awe-Keana area, Benue Trough, Nigeria. (co-supervision with Prof. Adam Bumby)

PhD Projects (completed)

2011-2017:      Dr. Olutola Jolayemi – Geochemistry and petrology of the Rooiberg Group, Bushveld Large Igneous Province, South Africa. (co-supervision with Dr. James Roberts)


PUBLICATIONS

·       Lenhardt, N., Bleeker, W., Ngwa, C.N. & Aucamp, T. (2020) Shallow marine basaltic volcanism of the Machadodorp Member (Silverton Formation, Pretoria Group), Transvaal Basin, South Africa — An example of Paleoproterozoic explosive intraplate volcanic activity in an epeiric embayment. Precambrian Research, 338, 105580. https://doi.org/10.1016/j.precamres.2019.105580

·       Fan, A., Yang, R., Lenhardt, N., Wang, M., Han, Z., Li, J., Li, Y. & Zhao, Z. (2019) Cementation and porosity evolution of tight sandstone reservoirs in the Permian Sulige gas field, Ordos Basin (central China). Marine and Petroleum Geology, 103, 276-293. https://doi.org/10.1016/j.marpetgeo.2019.02.010

·       Humbert, F., de Kock, M., Lenhardt, N. & Altermann, W. (2019) Neoarchean to early Paleoproterozoic within-plate volcanism of the Kaapvaal Craton: comparing the Ventersdorp Supergroup and the Ongeluk and Hekpoort formations (Transvaal Supergroup). In: Kroener, A., Hofmann, A. (Eds.) The Archaean Geology of the Kaapvaal Craton, Southern Africa, Springer Verlag, Berlin, 347-372. https://doi.org/10.1007/978-3-319-78652-0_11.

·       Ngwa, C.N., Lenhardt, N., Le Roux, P. & Mbassa, B.J. (2019) The Mount Cameroon southwest flank eruptions: Geochemical constraints on the subsurface magma plumbing system. Journal of Volcanology and Geothermal Research, 384, 179-188. https://doi.org/10.1016/j.jvolgeores.2019.07.016

·       Wetie Ngongang, A., Lenhardt, N. & Smit, A. (2019) Seismic hazard parameter estimation of the Mount Cameroon volcanic region (Cameroon) based on a combination of mixed catalogues. Natural Hazards, 96, 369-388. doi: 10.1007/s11069-018-3547-x

·       Humbert, F., de Kock, M.O., Altermann, W., Elburg, M.A., Lenhardt, N., Smith, A.J.B. & Masango, S. (2018) Petrology, physical volcanology and geochemistry of a Paleoproterozoic large igneous province: The Hekpoort Formation in the southern Transvaal sub-basin (Kaapvaal craton). Precambrian Research, 315, 232-256. doi: 10.1016/j.precamres.2018.07.022

·       Lenhardt, N., Borah, S.B., Lenhardt, S.Z., Bumby, A.J., Ibinoof, M.A. & Salih, S.A. (2018) The monogenetic Bayuda Volcanic Field, Sudan – New insights into geology and volcanic morphology. Journal of Volcanology and Geothermal Research, 356, 211-224. doi: 10.1016/j.jvolgeores.2018.03.010

·       Wang, Y., Yang, R., Song, M., Lenhardt, N., Wang, X., Zhang, X., Yang, S., Wang, J. & Cao, H. (2018) Characteristics, controls and geological models of hydrocarbon accumulation in the Carboniferous volcanic reservoirs of the Chunfeng Oilfield, Junggar Basin, northwestern China. Marine and Petroleum Geology, 94, 65-79. doi: 10.1016/j.marpetgeo.2018.04.001

·       Lenhardt, N., Masango, S.M., Jolayemi, O.O., Lenhardt, S.Z., Peeters, G.-J. & Eriksson, P.G (2017) The Palaeoproterozoic (~2.06 Ga) Rooiberg Group, South Africa: Dominated by high-grade lava-like and rheomorphic ignimbrites? New observations and lithofacies analysis. Journal of African Earth Sciences, 131, 213-232. doi: 10.1016/j.jafrearsci.2017.03.030.

·       Campbell, S.A., Lenhardt, N., Dippenaar, M., & Götz, A.E. (2016) Geothermal Energy from the Main Karoo Basin (South Africa): An Outcrop Analogue Study of Permian Sandstone Reservoir Formations. Energy Procedia, 97, 186-193.

·       Torres-Alvarado, I.S., Lenhardt, N., Arce, J.L. & Hinderer, M. (2016) Geochemical and isotopic composition of volcanic rocks of the heterogeneous Miocene (~23-19 Ma) Tepoztlán Formation, early Transmexican Volcanic Belt, Mexico. Journal of Volcanology and Geothermal Research, 316, 72-84. doi: 10.1016/j.jvolgeores.2016.02.015.

·       Arce, J.L., Layer, P., Martínez, I., Salinas, J.I., del Consuelo Macías-Romo, M., Morales-Casique, E., Benowitz, J., Escolero, O. & Lenhardt, N. (2015) Geología y estratigrafía del pozo profundo San Lorenzo Tezonco y de sus alrededores, sur de la Cuenca de México. Boletín de la Sociedad Geológica Mexicana, 67, 123-143.

·       Lenhardt, N. & Götz, A.E. (2015) Geothermal reservoir potential of volcaniclastic settings: The Valley of Mexico, Central Mexico. Renewable Energy, 77, 423-429. doi: 10.1016/j.renene.2014.12.034.

·       Lenhardt, N., Peeters, G.-J., Fontijn, K. & Macheyeki, A.S. (2015) The Ituwa Surge Deposits of the Holocene Ngozi Caldera, Mbeya Region, Tanzania. International Journal of Earth Sciences, 104, 749-751. doi: 10.1007/s00531-014-1098-2.

·       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 Bulletin19: 158-161.


CONFERENCES

·       Jolayemi, O.O., Robb, L.J., Lenhardt, N., Bybee, G., Kinnaird, J. & Nex, P. (2019) Volcanological and chemical comparison of rhyolites from different stratigraphic positions of the Rooiberg Group, Bushveld Magmatic Province. Goldschmidt2019, Barcelona, Spain, August 17-22 2019.

·       Jolayemi, O.O., Robb, L.J., Lenhardt, N., Kinnaird, J. & Nex, P. (2019) The Palaeoproterozoic Rooiberg Group, Bushveld Magmatic Province, South Africa: A stratigraphic review. 2019 Igneous and Metamorphic Studies Group (IMSG) meeting, Parys, South Africa, January 13-16 2019. 

·       Chiya, L., Lenhardt, N. & Robb, L.J. (2018) Geochemical characterization of rhyolites, tuffs, and breccias of the upper Schrikkloof Formation north of Modimolle. 2018 Igneous and Metamorphic Studies Group (IMSG) meeting, Cape Town, South Africa, January 14-17 2018.

·       Chiya, L., Lenhardt, N. & Robb, L.J (2018) Geochemical investigation of hydrothermally altered portions of the Schrikkloof Formation, Rooiberg Group, Modimolle, South Africa:  a mass balance approach. 2018 Geocongress, Johannesburg, South Africa, July 18-20.

·       Jolayemi, O., Lenhardt, N., Nex, P., Kinnaird, J. & Robb, L.J. (2018) The role of lithogeochemical variation in the classification of the Palaeoproterozoic Rooiberg Group, South Africa. 2018 Geocongress, Johannesburg, South Africa, July 18-20.

·       Campbell, S.A., Lenhardt N., Dippenaar M.A. & Götz A.E. (2016) Geothermal energy from the Main Karoo Basin (South Africa): Anoutcrop analogue study of Permian sandstone reservoir formations. EGU General Assembly 2016, Vienna, Austria. Geophysical Research Abstracts Vol. 18, EGU2016-115.

·       Campbell S.A., Lenhardt N., Dippenaar M.A. & Götz A.E. (2016) Assessment of the geothermal potential of the Main Karoo Basin (South Africa): An outcrop analogue study of Permian sandstone reservoir formations. 35th International Geological Congress, IGC 2016, Cape Town, South Africa, August 27-September 4 2016. 35th International Geological Congress Abstracts, paper no. 559. 

·       Götz A.E., Lenhardt N. & Ruckwied K. (2016) Thermal alteration of sedimentary organic matter in response to igneous intrusion (Karoo Basin, South Africa) and its implication for shale gas exploration.35th International Geological Congress, IGC 2016, Cape Town, South Africa, August 27-September 4 2016. 35th International Geological Congress Abstracts, paper no. 558. 

·       Hughes, H.S.R., Tanner, D., McDonald, I., Jolayemi, O., Maier, W., Lenhardt, N. & Kinnaird, J. (2016) Goldilocks or Plain Jane? The PGE metallogeny of the Bushveld LIP as recorded by the Rooiberg lavas. 40th Annual Mineral Deposits Studies Group (MDSG) Winter Meeting, Bristol, UK, December 19-21 2016. Programme and Abstracts, p. 51.

·       Lenhardt, N. & Masango, S.M. (2016) Lithofacies analysis of a Palaeoproterozoic (2.06 Ga) silicic large igneous province dominated by lava-like, rheomorphic ignimbrites – the Rooiberg Group, Kaapvaal Craton, South Africa.35th International Geological Congress, IGC 2016, Cape Town, South Africa, August 27-September 4 2016. 35th International Geological Congress Abstracts, paper no. 4737.

·       Lenhardt, N., Lenhardt, S.Z., Bumby, A.J., Ibinoof, M. & Salih, S.A. (2016) Morphological analysis of Holocene scoria cones and maar volcanoes of the alkaline Bayuda Volcanic Field in NE Africa (Sudan): new insights into the structure and evolution of a monogenetic volcanic field. 35th International Geological Congress, IGC 2016, Cape Town, South Africa, August 27-September 4 2016.35th International Geological Congress Abstracts, paper no. 3426. 

·       Campbell, S.A., Lenhardt, N. & Götz, A.E. (2015) Energy resource analysis of Permian Karoo deposits: An outcrop analogue study on the Ecca Pass section (Eastern Cape Province, South Africa). XVIII International Congress on the Carboniferous and Permian, ICCP 2015, Kazan, Russia.

·       Lenhardt, N. & Götz, A.E. (2015) Geothermal Energy from Deep Sedimentary Basins: The Valley of Mexico (Central Mexico). Geophysical Research Abstracts, Vol. 17: EGU2015-2433, Abstracts of the Contributions of the EGU General Assembly; Vienna.

  • Peeters, G.-J., Lenhardt, N., Fontijn, K. & Macheyeki, A.S. (2015) The influence of a shallow water body on eruption mechanisms: Case study of the Ngozi Caldera, Rungwe Volcanic Province, Tanzania. 26th IUGG General Assembly 2015, Prague, Czech Republic, June 22-July 2, 2015.

·       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 Magazine77(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.- 23rdColloquium 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, 6thannual 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/ 18thMeeting of Sedimentologists.


AFFILIATIONS AND MEMBERSHIPS

  • CCC: (IAVCEI) Commission on Collapse Calderas
  • DGGV: Deutsche Geologische Gesellschaft – Geologische Vereinigung (German Geological Society)
  • GSA: Geological Society of America
  • GSAf: Geological Society of Africa
  • 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

 

Published by Matthys Dippenaar

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