Imperial College London

Dr Cédric M. John

Faculty of EngineeringDepartment of Earth Science & Engineering

Reader in Carbonate Systems and Carbonate Reservoirs



+44 (0)20 7594 6461cedric.john Website




2.36BRoyal School of MinesSouth Kensington Campus





I am a Reader at Imperial College London, mostly working on carbonate systems, either in the context of oil and gas reservoirs, or for blue sky research.

My main interests include:

  • Clumped isotope geochemistry for carbonate paleo-thermometry, notably in the context of carbonate diagenesis
  • Numerical methods and programming, such as forward modelling of stratigraphy or development of software for geochemistry
  • Application of neural networks and machine learning for geological applications, for instance, image recognition to automatically extract information from core and thin sections.

The information presented here is just a brief summary. If you are interested in more information, for instance if you want to work with me, visit the my carbonate research group website:


  • 2018-current: Reader in carbonate systems and carbonate reservoirs, Department of Earth Science and Engineering, Imperial College London, UK.
  • 2013-2018: Senior Lecturer, Department of Earth Science and Engineering, Imperial College London, UK.
  • 2008-2013: Lecturer, Department of Earth Science and Engineering, Imperial College London, UK.
  • 2005-2008: Staff scientist, Integrated Ocean Drilling Program, Texas A&M University, College Station, TX.
  • 2004-2005: Postdoctoral fellow, Department of Earth Sciences, University of California, Santa Cruz, CA.
  • 2003 : Ph.D. (Dr. Rer. Nat.), magna cum laude, University of Potsdam, Germany.

Research Interests

  • Forward modeling of sedimentary processes to constrain the architecture of carbonate systems and the distribution of different facies 
  • Use of machine learning, notably neural network, for automatic feature extraction from unstructured geological data (for instance, image recognition of facies in cores)
  • Clumped isotope geochemistry and thermal history of carbonate, notably applied to carbonate diagenesis
  • Continental margin sediment and shallow-water carbonates. notably linked to field research


Selected Publications

Journal Articles

John CM, Bowen D, 2016, Community software for challenging isotope analysis: first applications of ‘Easotope’ to clumped isotopes, Rapid Communications in Mass Spectrometry, Vol:30, ISSN:0951-4198, Pages:2285-2300

Quesnel B, Boulvais P, Gautier P, et al., 2016, Paired stable isotopes (O, C) and clumped isotope thermometry of magnesite and silica veins in the New Caledonia Peridotite Nappe, Geochimica Et Cosmochimica Acta, Vol:183, ISSN:1872-9533, Pages:234-249

John CM, Bohaty SM, Zachos JC, et al., 2008, North American continental margin records of the Paleocene-Eocene thermal maximum: Implications for global carbon and hydrological cycling, Paleoceanography, Vol:23, ISSN:0883-8305

Sluijs A, Brinkhuis H, Schouten S, et al., 2007, Environmental precursors to rapid light carbon injection at the Palaeocene/Eocene boundary, Nature, Vol:450, ISSN:0028-0836, Pages:1218-U5

John CM, Karner GD, Mutti M, 2004, delta O-18 and Marion Plateau backstripping: Combining two approaches to constrain late middle Miocene eustatic amplitude, Geology, Vol:32, ISSN:0091-7613, Pages:829-832


Zachos JC, Bohaty SM, John CM, et al., 2007, The Palaeocene-Eocene carbon isotope excursion: constraints from individual shell planktonic foraminifer records, ROYAL SOCIETY, Pages:1829-1842

More Publications