People at Fort Hoofddijk

Tanja Zegers
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Dr. T.E. Zegers
Paleomagnetic Laboratory
Fort Hoofddijk
Faculty of Earth Sciences, Utrecht University
Department of Earth Sciences, 
Utrecht University 
Budapestlaan 17, 3584 CD Utrecht 
The Netherlands 


Other jobs/activities


Teaching of Tanja Zegers

Planetology: an introduction (GEO3-1327, 7.5 ects)
General introductory course to planetary sciences with emphasis on rocky planets and moons and comparative planetology. Hands-on labs numerical modelling of planetary evolution and geological remote sensing techniques with Mars data.

Earth and the Moon, one of the first images taken by Mars Express HRSC camera, 
on its way to Mars in June 2003
MSc projects

Mirjam van Kan (2004)
Geologic evolution of the Gusev crater region, Mars
Now at: Dept. of Petrology, Faculty of Earth and Life Sciences, Free University, Amsterdam

Ingrid Cnossen (2005) 
The habitat of early life: Solar X-ray and UV radiation at Earth’s surface 4-3.5 Gyr ago 
Now at: Radio and Space Plasma Physics Group, University of Leicester (UK)
Jelmer Oosthoek (2007) 
Geological mapping and structural analysis of Aram Chaos, Mars 
Now at: Dutch Geological Survey – TNO

John de Haan (2008)
Geological traverse mapping on Mars, using image and hyperspectral data

Floris van Lieshout (2009)
3D mapping of the Martian N-polar cap using Sharad and MARSIS radar data

Wouter Poos (2010)
Mapping Aureum Chaos (Mars).

Aram Chaos region (Mars), fracture density map
(from: MSc research project of Jelmer Oosthoek)

Research of Tanja Zegers
Comparative planetary evolution and factors influencing planetary habitability

Focus on Early Earth and Mars:

Early Earth
• Conditions of life in the Archean.
• When did plate tectonic processes start and how did they develop  ?
• How did the first continental crust form on Earth
• Paleomagnetic reconstructions of Archean terrains.

• Geological and structural mapping and analysis of Martian terrain.
• Early Mars compared to early Earth, conditions for life in early planetary times.
• Development of instruments, technology and methods for planetary exploration

Universal interests and tools
• Structural field geology in 4D (3D space + time)
• Hydrothermal alteration and mineral deposits
• The role of magnetism in planetary evolution
• Paleomagnetism and rockmagnetism as a tracer for past geological processes and reconstructions
• Geochronology

DelFly in flight in the ESTEC rover testbed

publications Other activities of Tanja Zegers
  • National Platform for Planetary Research - Member of the NPP core group

  • ESF programme Archean Environment: the habitat of early life – Steering committee member
  • Archean Environment: the habitat of early life
  • International Space Science Institute - PI of International Team

  • "Interior Layered Deposits: What do they tell us about Mars Evolution?"

  • EUROPLANET - JRA1 coordinator of Support to Future Exploration Missions

  • in particular landing site characterization and selection.

  • is a website created for, and maintained by, the planetary community with an interest in landing site characterization and selection.

Other interesting links:

ESA Planetary science Archive

HRSC view – Mars image data, including high resolution HRSC DTMs

HRSC image gallery


Mars Robotic Exploration

European Space policy

publications Publications of Tanja Zegers
in press
  • Biggin, A.J., de Wit, M.J., Langereis, C.G., Zegers, T.E., Voûte, S., Dekkers, M.J. and Drost, K. (2011). Palaeomagnetism of Archaean rocks of the Onverwacht Group, Barberton Greenstone Belt (southern Africa): evidence for a stable and potentially reversing geomagnetic field at ca. 3.5 Ga. Earth and Planetary Science Letters, in press   
  • Schumacher, S., & Zegers, T. E. (2010). Aram Chaos and its constraints on the surface heat flux of Mars. Icarus,  in press 
  • Fueten, F., Racher, H., Stesky, R., MacKinnon, P., Hauber, E., McGuire, P. C., et al. (2010). Structural analysis of interior layered deposits in northern Coprates Chasma,  Mars. Earth and Planetary Science Letters, 294, 343-356. 
  • Parker, M.V.K., Zegers, T., Kneissl, T., Ivanov, B., Foing, B., & Neukum, G. (2010). 3D structure of the Gusev Crater region. Earth and Planetary Science Letters, 294, 411-423. 
  • Zegers, T. E., Oosthoek, J. H. P., Rossi, A. P., Blom, J. K., & Schumacher, S. (2010). Melt and collapse of buried water ice: An alternative hypothesis for the formation of chaotic terrains on Mars. Earth and Planetary Science Letters, 297, 496-504. 
  • Pischel, R., & Zegers, T. (2009). Mars express science planning and operations. European Space Agency (Special Publication), SP 1291, 249-256. 
  • Fueten, F., Stesky, R., MacKinnon, P., Hauber, E., Zegers, T., Gwinner, K., et al. (2008). Stratigraphy and structure of interior layered deposits in west Candor Chasma, Mars, from High Resolution Stereo Camera (HRSC) stereo imagery and derived elevations. Journal of Geophysical Research E: Planets, 113(10) , art. E10008 
  • Rossi, A. P., Neukum, G., Pondrelli, M., van Gasselt, S., Zegers, T., Hauber, E., et al. (2008). Large-scale spring deposits on Mars ? Journal of Geophysical Research E: Planets, 113(8), art. E08016
  • Cnossen, I, Sanz-Forcada, J., Favata, F., Witasse, O., Zegers, T., Arnold, N. (2007). Habitat of early life: Solar X-ray and UV radiation at Earth’s surface 4–3.5 billion years ago. J. Geophys. Res. 112, doi:10.1029/2006JE002784. 
  • Fueten, F., Stesky, R., MacKinnon, P., Hauber, E., Gwinner, K., Scholten, F., Zegers, T. (2006). A structural study of an interior layered deposit in south western Candor Chasma, Valles Marineris, Mars, using high resolution stereo camera data from Mars Express, Geophys. Res. Lett, 33,  doi: 10.1029/2005GL025035 
  • Zegers, T.E. and Blom J.C. (2006). De geologie van Mars aan de hand van orbiterinstrumenten, Gea, 39, 30-34.
  • Greeley, R., Foing B.H., McSween H., Neukum, G., Pinet, P., van Kan, M., Werner, S.C., Williams, D., Zegers, T.E. and The Mars Express HRSC Team (2005) Fluid lava flows in Gusev Crater, Mars, J. Geophys. Res. 110, doi: 10.1029/2005JE002401
  • Zegers, T.E., Conan, Y.G., and Foing, B. (2004). Noachian Martian highlands; the habitat of ancient life ?, In: Harris, R.A. (Ed.), Proceedings of the 3rd European Workshop on Exo/Astrobiology, ‘Mars: The search for life’, Madrid, Spain (ESA SP-545, March 2004).
  • Zegers, T.E. (2004). Granite formation and emplacement as indicators of Archaean tectonic processes, In: Condie, K.C., and Eriksson, P. (Eds.), Tempos and events in Precambrian time, Amsterdam, Elsevier. 
  • Strik, G., Blake, T.S., Zegers, T.E., White, S.H. and Langereis, C.G. (2003). Palaeomagnetism of flood basalts in the Pilbara Craton, Western Australia: late Archaean continental drift and the oldest known reversal of the geomagnetic field, J. Geophys. Res., 108(B12), 2551, doi:10.1029/2003JB002475 
  • Zegers, T.E., Dekkers, M.J. and Bailly, S. (2003). Late Carboniferous to Permian remagnetization of Devonian limestones in the Ardennes: Role of temperature, fluids and deformation. J. Geophys. Res.Vol. 108, No. B7, 2357, doi: 10.1029/2002JB002213 
  • Kloppenburg, A. White, S.H. and Zegers, T.E. (2002). Erratum to "Structural evolution of the Warrawoona Greenstone Belt and adjoining granitoid complexes, Pilbara Craton, Australia: implications for Archaean tectonic processes"; [Precambrian Res. 112 (2001) 107-147], Precambrian Res., 116,165-166.   [PDF]
  • Zegers, T.E., Barley, M.E., Groves, D.I., McNaughton, N.J. and White, S.H. (2002). Oldest gold: Deformation and hydrothermal alteration in the Early Archean Shear zone-hosted Bamboo Creek Deposit, Pilbara, Western Australia, Economic Geology, 97, 757-773.
  • Zegers, T.E. and Van Keken, P.E. (2001). Mid Archean continent formation by crustal delamination, Geology, 29, 1083-1086.   [PDF]
  • Zegers, T.E., Nelson, D.R., Wijbrans, J.R. and White, S.H. (2001). SHRIMP U-Pb zircon dating of Archean core complex formation and pancratonic strike-slip deformation in the East Pilbara Granite-Greenstone Terrain, Tectonics, 20, 883-908.   [PDF]
  • Kloppenburg, A. White, S.H. and Zegers, T.E. (2001). Structural evolution of the Warrawoona Greenstone Belt and adjoining granitoid complexes, Pilbara Craton, Australia: implications for Archaean tectonic processes, Precambrian Res., 112, 107-147.    [PDF]
  • Zegers, T.E., Wijbrans, J.R. and White, S.H. (1999). 40Ar/39Ar age constraints on tectonothermal events in the Shaw Area of the eastern Pilbara granite-greenstone terrain (W. Australia): 700 Ma of Archean tectonic evolution, Tectonophysics, 311, 45-81   [PDF]
  • Zegers, T.E., de Keijzer, M., Passchier, C.W. and White, S.H. (1998). The Mulgandinnah Shear Zone; an Archean  crustal scale shear zone, Pilbara Craton, Western Australia. (Special Issue on Pilbara Craton), Precambrian Res., 88, 233-247. [PDF]
  • Zegers, T.E., de Wit, M.J., Dann, J. and White, S.H. (1998). Vaalbara, Earth's oldest assembled continent ? A combined structural, geochronologic and paleomagnetic test, Terra Nova, 10, 250-259.   [PDF]
  • Zegers, T.E., Wijbrans, J., Nelson, D. and White, S.H. (1998). 40Ar/39Ar and U-Pb dating in the eastern Pilbara: temporal constraints on structural and metamorphic events between 3.5 and 2.8 Ga, Geologie en Mijnbouw (extended abstract), 76, 353-355.
  • White, S.H., Zegers, T.E., de Keijzer, M. and Dirks, P. (1998). Tectonic evolution of the eastern Pilbara, Australia, Geologie en Mijnbouw (extended abstract),74, 343-347.
  • Zegers, T.E., White, S.H., De Keijzer, M. and Dirks, P. (1996). Extensional structures during deposition of the 3460 Ma Warrawoona Group in the eastern Pilbara Craton, Western Australia. Precambrian Res., 80, 89-105. [PDF]
  • Zegers, T.E. (1996). Structural, kinematic and metallogenic evolution of selected domains of the Pilbara granitoid-greenstone terrain; implications for mid archean tectonic regimes. (PhD thesis, Utrecht University) Geologica Ultraiectina, 146, 208 pp.